07. Section 300

SECTION 300
Section 300 Content Consideration
This section contains examples of nearly every type of antenna and transducer used in not only the EMC arena but
also other disciplines. When choosing your antenna be aware that they need to be supported by some form of mount
which can be found in section 800. Even if you have your own mounts do check that the coupling interface is
compatible. This can also mean checking to make sure that your antenna can be swung through ninety degrees for a
polarisation change without the elements striking some part of the mount. Having decided on whether you require an
antenna to just receive or transmit or do both, then read the full description and specification of that antenna on our
web site or in the main catalogue/CD. In the description of each antenna we describe the type of mount interface. If
you have no (or unreliable) coaxial cables, we provide a comprehensive list of varying lengths & appropriate types &
adaptors in Section 700. Most are supplied with calibration data for insertion loss. Generally, the end user need only
be concerned about loss when working above 30MHz as a rule.
Section 300 is broken down into five subsections. The first of these is Low Frequency Magnetic Field covering from
DC up to 30MHz. Many of the devices in this sub section will have the capability of handling a certain amount of
injected power and then radiate mainly for immunity and shielding effectiveness testing. These types are likely to
have an impedance matching switch to reduce the mismatch from the 50ȍ o/p Z of the power amplifier to the very
low i/p Z of the loop. All loop antennas are clearly described as to whether they can be used to transmit or not. Of the
receiving group you have the choice between active and passive loops. Be aware of the orientation of the loop to give
a maximum. Although all magnetic readings are read as a voltage across the 50ȍ i/p of a receiver, the antenna factor
will convert this to amps per metre. Generally, all loops are shielded against the electric component by enclosing the
conducting loop within an all-metal shield. This ensures that it is just the magnetic component of the radiated energy
that is responsible for producing an output voltage. Due to the relatively long wavelengths in this band, and hence
your distance from the source, the 377 Ohm relationship to the “E” field will not hold true and you may have to
measure the “E” field separately with a high impedance rod. However, the magnetic component of an EM field is a
fairly steady component to work with being somewhat unaffected by moving conducting (non ferrous) bodies in the
vicinity. In both the LF magnetic as well as the electric group, sets of transmit & receive antennas can be hired as a
single item.
The Low frequency Electric Field similarly covers the range DC to 30MHz. The DC coverage is provided by the 2ft
Crawford Cell which has a useful range up to 300MHz, otherwise most devices are in the form of 41 inch whip rods
and parallel elements. Again, decide if you are going to transmit or receive. If receiving, decide on whether the
antenna is to be active which has the effect of reducing the antenna loss factor to a few dBs or whether it is necessary
to have straight coupling via a matching balun. Be aware of the overload problem of active antennas and some baluns.
Very few of the antennas will have a full bandwidth from 10kHz through to 30MHz, generally they are switched at
about 5MHz. This unfortunately prevents an automatic program making a full uninterrupted sweep as the antenna
would have to be switched mid-way. If a series of readings are being taken over different terrains or locations then use
a ground-plane (counterpoise). This can be attached to the base of the rod. The RVR-25A/30 series were designed for
the EMC-30 receiver and have a coupling cable to the receiver which switches the matching baluns by octaves.
However, they can still be used independently and switched manually to cover the ten octave bands. There is no
polarisation change to make with 41 inch rod antennas, they are all operated in the vertical position.
The HF-VHF sub-section deals basically with biconicals but also embraces the combination of Biconicals & Log
Periodics known as “Bilogs”. The frequency embraces 26MHz-3GHz. Be aware of power handling capabilities and
mounting fixtures. Although all devices in this range are passive some are specifically for transmitting & others for
receiving. Included in this group and the microwave group are sets of two antennas of the same type which can be
hired under a single item number making it more economical. Generally, all the antenna factors supplied in the
handbooks are for a 3 metres range over a conducting ground plane. Some of the “bilogs” have a set of 3 metre free
space figures for FAR’s. See individual specifications for more details. All the bicons come with collapsible elements
which assist in packaging and shipping. A similar sub-section VHF-UHF contains mostly dipole sets covering up
1GHz.
Finally, the UHF-Microwave sub-section. This embraces frequencies from 200MHz upwards, the section houses all
the Log Periodics, Double Ridge Guide and horn antennas. When selecting microwave antennas you may well need to
hire the appropriate length of microwave cable otherwise losses will be considerable. A selection of microwave
adaptors are also available (Section 700). In previous years we offered a group of “Site Attenuation” antennas with the
appropriate calibration data. This has unfortunately been withdrawn as we could no longer rely on the maintenance of
the UKAS calibration after unverifiable usage & carriage. However, under section 900 we now offer this service using
the RSM procedure involving scanning the NPL groundplane and transferring this to your site for comparison.
Included with this section is an “E” Field “sniffer” with a range from 10kHz to 1GHz. This is used for finding leaks
around shielded doors & I/O panels.
SECTION 300 “AT A GLANCE”
Sub Section: Low Frequency Magnetic Field
302
303
304
305
305A
306
307
308
309
309A
310
311
312
313
314
315
316
317
318
319
EMCO 7604
Magnetic Field Pick-up Coil 20Hz-500kHz
ALP-10/11
Magnetic Receiving Loop 20Hz-50kHz
ALP-70
Magnetic Receiving Loop 10kHz-30MHz
EMCO 6507
Active Receiving Loop 1kHz-30MHz
EMCO 6507-RM Remote Status Monitor (for Item 305)
EMCO 6509
Passive Transmitting Loop 1kHz-30MHz
EMCO 6505
Antenna Set of Tx and Rx Loops 1kHz-30MHz
EM ALR-25/30 Octave Switched Passive Loop (Rx only) 10kHz-30MHz
EMCO 6502
Active Receive Loop 10kHz-30MHz
6502-RM
Remote Status Monitor (for Item 309)
EMCO 7603
Magnetic Field Generating Coil 20Hz-50kHz
EMCO 6512
Passive Loop 10kHz-30MHz. Mainly receive, max i/p 20W
EM-6402
Helmholtz Coil 2ft Diameter 2mT @ 50Hz
EM-6403-2
Helmholtz Coil 3ft Diameter 1.2mT @50Hz
EMCO 6404
Helmholtz Coil. 4ft. Diameter
EM-MFA/B/C One of three hand-held “Sniffer” Coils
EM-MFA/B/C Set of all three hand-held “Sniffer” Coils
SOLAR 9229-1 Loop Sensor (receiving) 30Hz – 100kHz
EM-6874
Generating Loop. 20Hz-100kHz. 0.3m dia. 20A max.
EMCH/CG-1
Mag Generating Coil for Def. Std. RS-01 Used with item 955
Sub Section: Low Frequency Electric Field
320
321
322
322A
323
324
325
325A
326
327
329
£555
£745
£750
£2343
£190
£1920
£4163
£2980
£2520
£190
£416
£1298
£2562
£3718
£9862
£415
£1100
£400
£550
£380
Insurance Value
EMCO 5102
Crawford (TEM) Cell 60cm DC-300MHz
PMA-11
Passive 82” Monopole Antenna 20Hz-50kHz
EMCO 3301B Active Rod Antenna Rx only 1kHz-30MHz
EMCO 3301-RM Remote Status Monitor (for Item 322)
EMCO 3303
Passive Rod Antenna1 for Tx but can Rx as well. 1kHz-30MHz
EMCO 3305
Set of both Tx and Rx Rods
EM RVR-25A Octave Switchable Rod Antenna 10kHz-30MHz
EM GPA-30/25 Groundplane (Counterpoise) 2ft square for Item 325
EMCO 3107B Parallel Element 500 Watt max i/p 10kHz-30MHz
AR AT3000
Parallel Element 1kWatt max i/p 10kHz-30MHz
EM PEF-10
VLF Active Dipole Rx only 20Hz-50kHz (designed for Item 106)
Sub Section: HF-VHF Antennas
336
337
338
339
340
341
342
342A
343
344
345
346
347
348
349
Insurance Value
£5798
£1245
£2426
£190
£1672
£4098
£2177
£110
£2837
£3110
£1450
Insurance Value
Chase CBL 6143A Bilog Antenna. 30MHz-3GHz 100 Watt i/p
Electro-Metrics
Bilog Model EM-6917B. 26MHz-3GHz 1kwatt i/p
Electro-Metrics
Bicon Model EM-6912A. 20MHz-300MHz 50 watt i/p
EMCO 3104/3109 Bicon Shielding Test set ( items 340 + 342)
EMCO 3104P
Bicon Antenna 30MHz-300MHz. 50W i/p max
EMCO 3108P
Bicon Antenna 30MHz-300MHz. 300W i/p max
EMCO 3109
Bicon Antenna 20MHz-300MHz. 1kW i/p max
Model XP
Bicon Extended Elements (for item 342)
EMCO 3110P
Bicon Antenna 30MHz-300MHz. Receive only !!!
EMCO 3142
Biconilog Antenna 26MHz-2GHz. Tx &Rx
Chase CBL 6111
Bilog Antenna 30MHZ – 1GHz 300Watts i/p power
EMCO 3141 “T”
High Gain Frame Bilog Ant. 26MHz-2GHz. 300 watt
Schwarzbeck VUBA 9117/9135 Miniature Bicon. 30MHz – 1GHz. 10Watts i/p
Chase CBL 6141A “X” Wing Bilog Antenna. 80MHz-2GHz 300Watt i/p
Schwarzbeck VUBA 9116/9139 Miniature Bicon. 150MHz –1.2GHz. 10Watts i/p
£3100
£2546
£1488
£4290
£1840
£2360
£2450
£772
£1712
£2963
£2750
£3198
£1200
£3100
£1100
SECTION 300 “AT A GLANCE” Continued
Sub Section: VHF-UHF Antennas
Insurance Value
350
350A
352
353
356
EMCO 3121C
EMCO 3121C
EM-TDA-25
EM-TDS-25
EM-BDA-25
Dipole Set 28MHz-1GHz Rx only
Dipole Set 28MHz-1GHz Rx only (Double Set)
Dipole Set 25MHz-200MHz (Double Set)
Tuneable Dipole Set 200MHz-1GHz (Double Set)
Broadband Dipole 20MHz-200MHz (Double Set)
£2428
£4856
£1555
£1645
£970
Sub Section: UHF- Microwave Antennas
Insurance Value
364
364A
365
366
367
368
369
370
370A
371
371A
372
373
375
375A
377
377A
379
381
382
384
385
385A
387
388
389
390
390A
392
392A
394
396
397
397A
399
EM-6969
EM-6969
R&S HE200
EMC-1010I
EM 7020
EM 7021
EM 7022
EMCO 3146
EMCO 3146
EMCO 3146A
EMCO 3146A
EMCO 3101
EMCO 3102
EMCO 3115
EMCO 3115
EMCO 3116
EMCO 3116
EMCO 3147
EMCO 3160-7
EMCO 3160-8
EMCO 3148
EM-6952
EM-6952
EM-3161-01
EM-3161-02
EM-3161-03
EM-3160-09
EM-3160-09
EM-3160-10
EM-3160-10
PEF-25
3121- B4 Set
SBA-9113
SBA-9113
SBA-9112
Horn Antenna. 6GHz-18GHz. (set of 2) 50 Watts
Horn Antenna. 6GHz-18GHz. ( Set of 2 )
Handheld D/F Antenna Kit 200kHz-3GHz
Standard Gain Horn 1-2GHz 200Watt
Horn Antenna 1-2.5GHz. 200 Watt (Supplement to item 387)
Horn Antenna 2-5GHz. 200 Watt. (Supplement to item 388)
Horn Antenna 4-10GHz. 200 Watt (Supplement to item 389)
Log Periodic 200MHz-1GHz 1kWatt i/p
Double set of the above antennas (item 370)
Log Periodic 300MHz-1GHz 1kWatt i/p
Double set of the above antennas (item 371)
Log Con Spiral 200MHz-1GHz
Log Con Spiral 1GHz-10GHz 50 Watt
Double Ridged Guide 1GHz-18GHz 300Watt
Double set of Item 375
Double Ridged Guide 18GHz-40GHz
Double set of Item 377
Log Periodic Antenna 200MHz-5GHz Watts-See full description
Horn Antenna 8.2GHz-12.4GHz (Set of two) 250 Watt
Horn Antenna 12.4GHz-18GHz (Set of two) 200Watt
Log Periodic 200MHz-2GHz. 1kWatt
Log Periodic 1GHz-18GHz i/p power 5 Watts only
Double set of Item 385
Octave Horn. 1-2 GHz. 550Watt i/p power
Octave Horn. 2-4 GHz. 250Watt i/p power
Octave Horn. 4-8 GHz. 250Watt i/p power
Standard gain Horn. 18GHz-26.5GHz. 50 Watts i/p power
Standard gain Horn. (Set of Two units)
Standard gain Horn. 26.5GHz –40GHz. 10 Watts i/p power
Standard gain Horn. (Set of Two units)
Electrostatic Field Probe “E” Field Sniffer 10kHz-1GHz
Two 500MHz-1GHz telescopic dipoles (shielding test set)
Schwarzbeck. Miniature Bicon. 0.5GHz-3GHz 20W i/p pwr.
Double Set of above type Antenna, item 397.
Schwarzbeck. Miniature Bicon.3GHz-18GHz 10Wmax i/p pwr
£2900
£2900
£2870
£1460
£1544
£735
£860
£1650
£3300
£1536
£3072
£1815
£1743
£2846
5692
£2783
£5566
£3342
£2000
£1690
£2196
£1215
£2430
£2650
£2780
£1400
£1120
£2240
£1120
£2240
£466
£870
£810
£1620
£1355
SECTION 300 “In Detail”
ELECTROMAGNETIC TRANSDUCERS-RADIATED
Sub Section: LOW FREQUENCY MAGNETIC FIELD
ITEM 302
EMCO7604 Magnetic Field Pick-Up Coil. 20Hz-500kHz.
Used for measuring magnetic emissions to specification limits in MIL-STD461, 462, 463 and now in other specifications and standards. It is generally
used connected to an EMI receiver covering the required frequency range.
Not for transmitting. Typical compatible receivers would be items:
105;120;121;116
Specifications:
Electrical
Useful Freq Range:
Conversion Factor:
Coil Diameter:
Winding:
Resistance:
Inductance:
Connector:
20Hz to >500kHz
Refer to handbook
13.3cm
36 turns of 7-41 Litz.
10ȍ, nominal
340 PH, nominal
BNC female
Mechanical
Case Dimensions 27cm x 22cm x 7.5cm
(LxWxH):
Case Weight:
0.6kg
ITEM 303
ALP-10/11 Receiving Loop - 20Hz-50kHz.
This loop antenna is used to obtain magnetic field measurements from
20Hz-50kHz. It has a balanced Faraday shield that reduces its response to
electric fields to a minimum thus enabling only the magnetic component
of a composite field to be measured. The loop should be connected into
50ohm measuring instruments such as the EMC-11/R&S-ESS Series
interference receivers (Items 104/121). The loop is not for transmitting
This item can be either mounted on a tripod (Section 800) via a threaded
hole in the base plate (1/4UNC) or used as a bench-top accessory.
Specifications:
Electrical
Frequency Range (Calibrated): 20Hz-50kHz
Impedance:
Calibration for use into 50:
Output Connector:
BNC
Mechanical
Outside Diameter: 25” (63.5cm)
Height:
27” (69.5cm)
Weight:
1.1lbs (0.5kg)
Case Dimensions 68cm x 77cm x 18cm
(LxWxH):
Case Weight incl. Item: 13.2kg
ITEM 304
EM-6879 or ALP-70 Receiving Loop - 10kHz-30MHz. This antenna has
been designed and calibrated to obtain magnetic field measurements from
10kHz-30MHz in a 50ȍ system. The loop antenna may be used with any
spectrum analyser or receiver (Section 100). A balanced Faraday shield
ensures a response only to the magnetic component of any field. This is a
receiving antenna only, not for transmitting. It will encompass the LF
radiated test required on some of the commercial specs.
Specifications:
Electrical
Frequency Range: 10kHz-30MHz
Impedance: Calibration for use into 50:
Signal Output Connector: BNC
Mechanical
Outside Diameter: (63.5cm) 25”
Height: (68.58cm) 27”
Weight: (0.5kg) 1.1lbs
Case Dimensions:68cm x 77cm x 18cm
(LxWxH)
Case Weight including Item: 13.2kg
ITEM 305
EMCO 6507 Active Loop Antenna 1kHz-30MHz - Receiving only.
Battery powered. This broadband active loop antenna has been designed to
perform Shielding Effectiveness Measurements operating in the frequency
range of 1kHz to 30MHz to MIL-STD285 and NSA 65-6 Specifications.
Designed for use with most 50: input receivers it includes an RF
preamplifier. The antenna is powered by a rechargeable battery and comes
with a battery charger. It can easily be mounted on a standard tripod (¼
UNC receptor) or the NCTM-90 (Item 807). The antenna also supports an
“overload” LED when an i/p signal exceeds the 1dB compression level of
10v/m. This can be remotely observed with item 305A. Sensitivity Typical:
11dB(mA/m) @10kHz, -29dB(mA/m) @ 1MHz With a 200Hz
Bandwidth/Average Detector Function.
Specifications:
Electrical
Frequency Range (Calibrated): 1kHz-30MHz
Dynamic Range: 78dB@10kHz,118dB@1MHz
1dB Compression Point: 10V/m
Output Impedance:
50ohm
Connector:
Type BNC
Mechanical:
Loop Size:
30.4cm (12”)
Power: 2 x 6 volt rechargeable
sealed lead-acid battery cells
Re-charge time:
8 hours
Overall Height:
35.6cm (14”)
Weight:
1.8kg (4lbs)
Case Dimensions: 25cm x 43cm x 49cm
Case Weight including Item:
6.6kg
ITEM 305A
EMCO Model 6507-RM Remote Status Monitor.
This item can only be ordered as an accessory to the main Item
305. It comprises a 10 metre length of fibre optic with a small
attachment plate which screws onto the antenna over the
display lights which indicate power “ON” and more
importantly “SATURATION” or overload. The fibre optic
cable is then terminated onto a small angled bracket which is
labelled as per the antenna. Typically used in a chamber testing
environment where the operator can not enter but needs to
verify remotely the antenna status.
Mechanical kit comprises
Customised plastic case. 10 metres of fibre optic. One
attachment bracket. One display bracket. A small posidrive to
attach bracket to antenna.
ITEM 306
EMCO 6509 Passive Loop - 1kHz-30MHz – Transmitting
EMCO model 6509 is a 12 inch diameter band-switched matching
passive loop antenna used for transmitting and operates in the frequency
range of 1kHz to 30MHz. Although just a single wired loop it is fed
from a tapped transformer providing the optimum power matching to a
50ȍ signal source. It can be used with item 305 or item 308 to form the
Shielding Effectiveness Test Set. It can be used also as a simple radiator
for general immunity transmission. This antenna comes in a customised
transportation case. The loop is not screened against “E” field. Note:
Do not switch ranges whilst RF power is being applied.
Specifications:
Electrical
Frequency Range:
1kHz-30MHz
Input Impedance:
Nominal 50ohms
Maximum Input Power: 1kW
Range Switching:
Band 1 0.001 - 0.06MHz
Band 2 0.06 - 0.4MHz
Band 3 0.4 - 1.0MHz
Band 4 1.0 - 30.0MHz
Antenna Factor: See Handbook
(Magnetic and Electric)
Mechanical
Loop Size:
30.4cm (12”)
Weight:
1.35kg (3lbs)
Overall Height: 47.8cm (18.75”)
Weight with Case: 7.1kg
Case Dimensions (LxWxH):
56cm x 43cm x 17cm
ITEM 307
EMCO 6505 - Antenna Set of Tx/Rx Loops 10kHz-30MHz
This set comprises the EMCO model 6509 Tx loop & The ALR30M (item 308) a ten band receiving loop. Originally the above
named set consisted of the EMCO 6509 (Item 306) transmitting
loop and the EMCO model 6507 (Item 305) broadband active
receiving loop. However, in many cases an inactive loop is
preferred as it reduces danger of compression or overload. These
antennae are used for MIL-STD 285 or IEEE-299 Shielding
Effectiveness. For individual data see (Items 305/306/308)
.Picture shows Tx loop with item 308 (in blue).
Don’t forget that a remote status monitor is available (Item 305A)
for the active loop (if preferred) if you are testing remotely and
fear overload.
Specifications:
See Items 305 & 306 / 308 for specification. The above antennae
are provided in one single case dimensions :64cm x 50cm x 30cm.
ITEM 308
EM ALR-25/30 - Switchable Passive Loop 10kHz-30MHz - Rx only
Originally configured for MIL-STD testing. The ALR30 remote loop
antenna transforms magnetic field components by ten passive matching
circuits from 9kHz-30MHz and has been designed for use with the
Electro-Metrics EMC-30 GPIB controlled receiver and other 50ȍ input
systems. It covers the same octave ranges as the ten matching bands of
the EMC30 Rx. The matching network switches automatically via TTL
when the 7 metres length ACC-25A/30 control cable connects to the Rx.
The antenna can also be used independently with a BCU-25 battery unit
which screws into the unit allowing band switching via a front panel
rotary switch. Please specify how you wish to use the antenna.
The use of tuned matching transformers increases the sensitivity of the
loop whilst reducing the risk of overload across the band. A Thru-Wall Filter (AWF-75) is available for a
more permanent set-up where the ACC-25A/30 control cable has to pass through into a chamber. The
control cable then comes in two lengths.
Specifications:
Electrical:
Frequency Range: 10kHz-30MHz
No of Bands:
10 in octaves
Impedance:
50ȍ Calibration
Output Connector: BNC/N
Mechanical:
Outside Diameter: 43cm (17”)
Height:
51cm (20”)
Weight:
3kg (6.5lbs)
Case weight incl. Item: 12kg
Case Dimensions: 2cm x 29cm x 64cm
ITEM 309
EMCO 6502 Active Loop - Rx only 10kHz-30MHz
This 25” broadband antenna operates in a frequency range of 10kHz to
30MHz and was designed to perform Magnetic Field Emissions Testing - 3
metre VDE0871 Limit A and B. An RF pre-amplifier is built into the base.
The antenna is designed to be used with a 50ohm input receiver and
performs approximately with a 10dB antenna factor. A battery powered
antenna which comes with a battery charger for recharging (batteries
provided should give power to amplifier for approx. 16 hours). The antenna
is easily mounted on to a standard tripod with a ¼ unc stud. The loop is
screened against the electric field. There is no band switching.
Specifications:
Electrical:
Frequency Range: 10kHz-30MHz
Dynamic Range:
85dB at 10kHz, 125dB at 1MHz
(200Hz Bandwidth avrg detector function)
Sensitivity: -1dB(mA/m) at 10kHz
-42dB(mA/m) at 1MHz
(200Hz Bandwidth avrg detector function)
1dB Compression Point: 5V/m
Output Impedance:
50:
Connector:
BNC female
Power: Two 6v rechargeable
sealed lead acid cells.
Mechanical:
Loop Size:
60cm (23.6”)
Loop Weight: 2.04kg (4.5lbs)
Overall Height: 67.3cm (26.5”)
ITEM 309A
EMCO Model 6502-RM - Remote Status Monitor
This item can only be ordered as an accessory to the main Item 309. It comprises of a 10 metre length of
fibre optic with a small attachment plate which screws onto the antenna over the display lights which
indicate power “ON” and more importantly “SATURATION” or overload. The fibre optic cable is then
terminated onto a small angled bracket which is labelled as per the antenna. Typically used in a chamber
testing environment where the operator can not enter but needs to verify remotely the antenna status.
Mechanical kit comprises
Customised plastic case. 10 metres of fibre optic. One
attachment bracket. One display bracket. A small
posidrive to attach bracket to antenna.
ITEM 310
EMCO Model 7603 - Magnetic Field Generating Coil 20Hz-50kHz
This magnetic field generating coil is used in Magnetic Susceptibility Tests for qualifying equipment to
specification MIL-STD-461D & 462D. method RS01. It is built in rigorous conformance with the
description in that specification and is made of Delrin. When RS01 is being performed, a 1ȍ, 100W
resistor should be connected in series to monitor current by a
suitable meter. (item 267B). However, some aspects of Mil.Std.
462D require a monitoring loop to actually confirm the strength of
the magnetic field at a specific point. This monitoring loop can be
found under item 317. See inset photo.
Specifications:
Electrical:
Coil: 10 turns of No 16 SWG wound
on a non- conducting Delrin form.
Useful Frequency Range: 20Hz-50kHz
Self-Resonant Frequency: >100kHz
Maximum Current: 10 amps short time,
5 amps continuously
Coil Constant: 5 x 10-5 Tesla/amp at
5cm from wire turns
1 Tesla = 1 Weber/sq. meter = 104 gauss
Mechanical:
2 female banana jacks spaced:
Nominal Coil Diameter:
Thickness of Coil:
Weight:
0.75” apart
12cm (4.75”)
0.3cm
0.45kg
ITEM 311
EMCO 6512 Passive Loop 10kHz-30MHz - Tx & Rx
EMCO Model 6512 passive loop is designed for Emissions and Immunity
Testing and can be used as a transmitting or receiving antenna. A better
performance due to the coil size without the overload menace when
receiving. Screened against the “E” field.
Specifications:
Electrical:
Frequency Range: 10kHz-30MHz - usable bandwidth
Output Impedance: Varies depending on frequency
Antenna Factor:
See handbook
Connector:
Female BNC Connector
Max i/p power:
20 Watt
Mechanical:
Size:
56cm (22”) Loop dia. 3” x 5” base
Weight: Approximately 1.6kg
Tripod Mounting: A ¼ UNC hole is provided
on base for Tripod mounting
Case Dimensions (LxWxH): 70cm x 80cm x
18cm
Case Weight:
22kg
ITEM 312
Model 6402 - Helmholtz Coil System
Model 6402 Helmholtz coil system has twin 0.6 metre (2ft) diameter
coils in a Helmholtz configuration and normally used as a Magnetic
Field Immunity Test System or simply a low frequency magnetic field
calibrator. A magnetic field is produced by two coils that is essentially
homogenous throughout the volume between the face of the coils and
one-third diameter of the coils at it’s centre. The coils are supported
by a non-metallic framework. A rotating, height-adjustable pedestal is
capable of holding articles weighing up to 15kg. The Coil has been
initially calibrated at the NPL in terms of uT/amp at 50Hz. For the end
user’s convenience NPL have also quoted a figure of uTesla per
millivolt as measured across an installed shunt resistor with
measuring terminal placed at the base of the Helmholtz. This was
done at 60Hz and 2kHz. Typical examples of field using the crown LF
amplifier can be seen on the graph below where the Crown amplifier
(item 402) is hard driven with 3.1vrms input. At 1kHz, a field of 195
microTesla is achievable with the amplifier supplying 1.4amperes (hard driven). Built in on the base is the
feed connector with 1ȍ resistor for current verification. Also a 4m amplifier o/p supply lead. The device can
arrive disassembled or assembled.
Specifications:
Electrical:
Coil Factor: 141.86 uTesla/ampere
Homogeneity: r 2% within a 25cm cube
Coil Impedance: Approx. 0.5ohms DC;
Inductance: 7.47millihenrys
Self Resonance: 26kHz
Max I Input: 15 amps continuous
** 1 gauss = 100μT = 160dBμT
= 80 Amps/metre
Mechanical:
Diameter:
0.35m (2’)
Weight:
approximately 10kg (23lbs).
ITEM 313
Model 6403 - Helmholtz Coil System
Model 6403 Helmholtz coil system has 2 x 0.9 metre (3ft)diameter coils in a
Helmholtz configuration and may be used as a Magnetic Field Immunity Test
System or calibrator. A magnetic field is produced by the coil that is essentially
homogenous throughout the volume of a one-third metre cube in its centre. The
coils are supported by a non-metallic, non-magnetic framework. At the centre of
the assembly base, a rotatable, height-adjustable pedestal is capable of holding
test articles weighing up to 34kg (75 lbs). The Coil has been calibrated at the
NPL in terms of uT per ampere at 50Hz .
For the end user’s convenience NPL have
also quoted a figure of uTesla per millivolt as measured across an
installed shunt resistor with measuring terminal placed at the base of
the Helmholtz. This was done at 60Hz and 2kHz. With this particular
model, at 60Hz and a drive of 8.8 amperes, a field of 1.0 milliTesla
was achieved. At 1kHz a field of 57.3 u/T with 560 milliamperes was
achieved. Note: Amplifier used was Crown (item 402) hard driven with
3.1vrms i/p drive. Specifications:
Electrical:
Coil Factor: 118.71 uT/ ampere **Homogeneity: r 5% within a 30cm cube. Inductanc: 18.4 millihenrys
Coil Impedance: Approx. 2.5ohms DC;
Self Resonance: 18kHz.Max Current i/p:15 amps continuous. 1gauss =100μT=160dBμT=80 Amps/metre
Mechanical:
Diameter:
0.9 metre (3’) Weight: approximately 24kg (53lb)
ITEM 314
Model 6404 - Helmholtz Coil System
EMCO Model 6404 Helmholtz coil system has 2 x 1.2 metre diameter coils
in Helmholtz configuration and may be used as a Magnetic Field Immunity
Test System or a low frequency magnetic field calibrator. A magnetic field
is produced by the coil that is essentially homogenous throughout the
volume of a one-third metre cube in it’s centre. The coils are supported by a
non-metallic, non-magnetic framework. At the centre of the assembly base,
a rotatable, height-adjustable pedestal is capable of holding test articles
weighing up to 34kg (75 pounds). The Coil has been calibrated at the NPL in
terms of uT per ampere at 50Hz. A graph below indicates the sort of mag
fields achievable when driven by our Techron Amp (item 400) with the
maximum 3.1vrms drive to the amp. Device normally arrives dismantled with
a bespoke box containing all delrin assembly rods & screws. Included also is the coil feed cable with
current monitoring resistor on the base.
Specifications:
Electrical:
Coil Factor:
82.51 uTesla/ampere
Homogeneity: r 10% within a 40cm cube
Coil Impedance: approximately 2.5ohmsDC;
Inductance:
45 millihenrys
Self Resonance: 43kHz
Max Current I/p: 20 amperes continuous
** 1 gauss = 100μT = 160dBμT
80 Amps/metre
Mechanical:
Diameter: 1.22 metre (mean Coil dia 48”)
Weight: approximately 56kg (165lbs)
ITEM 315
Magnetic Field Probes (Sniffers)
(Single Units)
A set of three loop probes covering the frequency range 10kHz-230MHz
designed to search for RF magnetic leaks especially in cabinets and
shielded enclosures. They are rubber covered and colour coded for easy
frequency identification. This particular item number (315) refers to the
hire of a single loop. Available also as a set of three (Item 316). Please
specify which model you require.
Frequency Range: MFA-25 (red) - 10kHz to 520kHz
MFB-25 (white) - 480kHz to 25MHz
MFC-25 (blue) - 22MHz to 230MHz
Output Connector:BNC Weight:
0.49kgDimensions: 240mm x 90mm (loop) x 30mm(handle dia).
ITEM 316
Magnetic Field Probes (Sniffers)
(Set of 3)
A set of three loop probes covering the frequency range 10kHz230MHz designed to search for RF magnetic leaks especially in
cabinets and shielded enclosures. They are rubber covered and colour
coded for easy identification. This particular item number (316) refers
to the hire of all three loops. NOTE: The electrostatic probe which
covers the “E field” element in field detection can be found in (Item
394).
Frequency Range: MFA-25 (red) - 10kHz to 520kHz
MFB-25 (white) - 480kHz to 25MHz
MFC-25 (blue) - 22MHz to 230MHz
Output Connector: BNC
Weight:
0.49kg
Dimensions:
240mm x 90mm (loop) x 30mm (handle dia)
ITEM 317
Solar Model 9229-1 – Loop Sensor 30Hz-100kHz
Generally used in conjunction with item 310 the EMCO 7603
Mag Generating coil (or equivalent Solar 9230). The design is
in compliance with MIL.Std. 461D and 462D. Method RS-101.
Specification for Radiation Susceptibility Testing. (magnetic
Field) A manual accompanies this sensor coil explaining its
use and configuration with item 310 the EMCO 7603 ( shown
inset). The manual shows how to generate magnetic fields at
various distances along the EMCO 7603 loop axis. It can
essentially confirm the field produced from any device where
calculation by number of turns, current and distance is
unreliable. The device comes with a plastic screw extender to
fix the correct distance from the generating coil. This can be
seen on the inset photo.
Specifications:
Electrical:
Loop Diameter: 4cm
Loop area :12.56 square cm.
Connector: BNC
ITEM 318
EM-6874 – VLF Magnetic Field Generating Loop 20Hz – 100kHz
The EM –6874 Loop is mainly used for uncalibrated substitution
measurements of Shielding Effectiveness as described by Mil.Std. 285,
IEEE Std. 299, and NSA65-6. It comprises a radiating element of a single
turn 0.3m diameter electrostatically shielded. Field strength generated is
directly proportional to current in loop. See specification below.
The antenna impedance is seen as a 600nH coil in series with a resistance
of 2 ȍ. The coil can take up to 20 amperes rms. The recommended drive
amplifiers for this loop are items 400 or 402.
Specifications: 1 Tesla = 1 Weber/sq.meter = 104 gauss
Electrical:
Coil: 1 turn of No 10 wire shielded.
Field Strength generated: = 2.7mA/metre/Amp (approx)
Mechanical:
Connector N.
Nominal Coil Diameter: 33cm (11.5”) Weight: 0.45kg
ITEM 319
EMCH Model CG-1 Magnetic Field Generating Coil 20Hz-50kHz
This magnetic field generating coil is used in Magnetic
Susceptibility Tests for qualifying equipment to specification
Def.Stan. Method RS01. It is built in conformance with the
description in that specification and is made of Delrin. When
RS01 is being performed, a 1ȍ, 100W resistor should be
connected in series to monitor current by a suitable meter. (item
267B). However, some aspects of Mil.Std. 462D require a
monitoring loop to actually confirm the strength of the magnetic
field at a specific point. This monitoring loop can be found
under item 317.
Specifications:
Electrical:
Coil: 20 turns of No 16 SWG wound
on a non- conducting Delrin form.
Useful Frequency Range: 20Hz-50kHz
Self-Resonant Frequency: >100kHz
Maximum Current: 10 amps short time,
5 amps continuously
Coil Constant: 5 x 10-5 Tesla/A at 5cm from wire turns.
Mechanical: 2 female banana jacks spaced: 0.75” apart. Nominal Coil Diameter: 12cm (4.75”)
Thickness of Coil: 0.3cm, Weight: 0.45kg. 1 Tesla = 1 Weber/sq. meter = 104 gauss
Sub Section: LOW FREQUENCY ELECTRIC FIELD
ITEM 320
EMCO 5102 TEM Cell - DC to 300MHz
The 5102 Transverse Electromagnetic (Crawford) Cell is a 2ft large rectangular transmission line end
tapered 24” (60cm) to a coaxial line. Normally, one end is terminated in a precision 50ȍ RF load ( of
sufficient wattage) whilst the voltage at the feed end is accurately determined over the usable frequency
range. The cell is also a shielded enclosure providing electrical isolation for various tests. Both the upper
and lower halves may be used to obtain accurate field readings by dividing the rms voltage on the septum
by the septum to floor distance in metres. A principal function of the TEM cell serves as a calibration
source for field intensity. Hence, field strength meters can be placed inside (if size permits) to check
readings. The cell of course can be used as a simple small chamber for straight immunity work.
Construction: The cell is constructed of aluminum. The body and door are .125” aluminum sheet and the
septum is .190” aluminum sheet. The taper to cable connection (transition B) is machined aluminum.
Dielectric support rods are 1” (2.5cm) Delrin. Septum to surface distance is 12”. Hence, EUT size: 4” sq.
ideally. A connector pack with two plugs & leads is provided to power up devices within the cell. Other
access holes are provided about 30mm in diameter.
Specifications:
Electrical:
Frequency Range: DC-300MHz
Electrical Rating: 6 Amps, 120/250 VAC RMS,
50-60Hz Single Phase for electrical outlets
and power line filters)
Mechanical
Size: 71cm x 135cm x 64cm
(24” wide x 53” Long x 25” High)
Weight: 16kg (35lbs)
Septum Weight Capacity: 11.4kg (25lbs)
End Connectors: “N” f.
ITEM 321
PMA-11 - Passive Monopole Antenna 20Hz-50kHz
This low frequency antenna is used to obtain electric field
measurements from 20Hz to 50kHz and was especially designed for
Power Line Measurement Testing. PMA-11 is used in conjunction with
the EMC-11 (item 104) and other low frequency receivers. The PMA11 gives measurements of AF noise emanations from DC power lines
and other environments of high LF “E” field signals. The MIL
standards are IEEE Std. 368-1977- Section 9, Probe Wire Method and
IEEE Std. 644-1979. This antenna can be mounted on a tripod and
comes with a counterpoise and handbook. The graph below shows the
AF Vs Freq and the darker upper line matches the performance when terminated at the i/p of a 50 ȍ
measuring receiver.
Specifications:
Electrical:
Frequency Range: 20Hz-50kHz
Maximum E-Field: 150kV/m @ 60Hz
Output Impedance: Matched to 50ȍ
Connector:
BNC
Mechanical:
Ant Rod length: (82”)
Weight:
3.1kg (6.7lbs)
Diameter Plate Element: 20cm (7.9”)
Base size: 30.5cm x 30.5cm x 7.6cm
(LxWxH):
ITEM 322
EMCO 3301B Active Rod Antenna 1kHz-30MHz - Rx only
EMCO model 3301 rod is designed to measure the “E” field in a single
band over the prescribed frequency range. With its companion transmitting
rod, the 3303 (Item 323), it sees most work in performing Chamber
Shielding Tests to MIL-STD-285 and NSA 65-6.The antenna factor 3dB
roll-off points are 175Hz and 35MHz. Between 250Hz and 20MHz, the
antenna factor is flat within +-1dB. To help prevent saturation at the low
frequency end, the lower 3dB point is switch-selectable at 170Hz; 1.9kHz
or 22kHz. Saturation will not occur below a field strength of 0.7V/m
resulting in an extremely wide dynamic range of 115dB nominal at midband. Internal attenuators of 10 and 30dB provide the ability to increase the upper limit of the antenna to
22V/m. A saturation indicator alerts the user should overload occur. The mechanics of the antenna consist
of an adjustable rod, a 24” x 24” counterpoise. A high input impedance amplifier built into the base and a
battery charger charging sealed lead acid batteries.
Specifications:
Electrical:
Frequency Range: 1kHz-30MHz
Output Impedance: 50ȍ
Input Impedance: >20 Mȍ, 100 kȍ
(depending on the low frequency
Megohm or roll off selected)
Batteries: 2 x 6 volt batteries provided
needs recharging after 10 hours
Battery Charger: Supplied with unit.
Size (LxWxH): 12cm x 8.8cm x 19cm.
Tripod/Counterpoise mountable.
Weight:
1.8kg
The counterpoise is screwed to unit and rod height set up to 104cm
Case Dimensions (LxWxH): 74cm x 41cm x 19cm
Rod Height: 51cm to 127cm.
ITEM 322A
EMCO Model 3301-RM - Remote Status Monitor
This item can only be ordered as an accessory to the main Item
322. It comprises a 10 metre length of fibre optic with a small
attachment plate which screws onto the antenna over the display
lights indicating power “ON” and more importantly
“SATURATION” or overload. The fibre optic cable is then
terminated onto a small angled bracket which is labeled as per
the antenna. Typically used in a Chamber Testing Environment
where the operator cannot enter but needs to verify remotely the
antenna battery condition and overload status.
Mechanical kit comprises
Customised plastic case. 10 metres of fibre optic. One
attachment bracket. One display bracket.
A small posidrive to attach bracket to antenna.
ITEM 323
EMCO Model 3303 Passive Rod. Tx & Rx - 1kHz-30MHz
This is 41” passive rod antenna and has been basically designed for
transmitting but can also be used for receiving. It is a broadband E-field
monopole with a two switched position matching transformer to present
some impedance to the drive amplifier whilst driving a high impedance
rod. It operates within a frequency range of 1kHz-30MHz. The rod,
constructed in stainless steel, is adjustable from 20” to 41”. You may
choose the frequency band by manually rotating the band switch that is
located at the base of the antenna.
Caution: Be certain to reduce amplifier power to zero watts before
band switching.
Specifications:
Electrical:
Frequency Range: 1kHz-30MHz
Maximum Wattage:1kW
Input Impedance: 50:
Band switched:
Band 1. .001-5MHz
Band 2. 5-30MHz
Connector:
Female type N
Mechanical:
Rod Height:
104cm (41”)
Base width:
7.6cm x 7.6cm x 15cm
Weight:
1.3kg (2.8lb)
Case Dimensions (LxWxH):
67cm x 40cm x 12cm
ITEM 324
EMCO Model 3305 Set of Tx/Rx Rods (Items 322 and 325)
This set of transmitting and receiving rods comprise the items (322
and 325) Combined, this antenna set is used to measure to MILSTD-285 and NSA 65-6 Shielding Effectiveness (“E” field). The
model RVR-25/30 has been substituted in place of the EMCO 3301B
which would require constant
attention to the overload situation.
With the RVR-25 there is no
amplifier to saturate instead there is
a 10 position band switch enabling
a form of tuning to provide the best
impedance
conversion
whilst
discriminating against frequencies
outside the passband.
ITEM 325
EM-RVR-25A Switchable Rod. 10kHz-30MHz - Rx only
Originally configured for MIL-STD testing. The RVR25A remote 41”
rod antenna transforms the electric field component through ten passive
transformer matching circuits from 10kHz-30MHz in octaves. It has
been designed for use with either the EMC-30 GPIB controlled receiver
or the manual EMC-25 version (Section 100) plus of course other 50ȍ
input receivers. It matches the same octave ranges as the ten matching
bands of the EMC30/25 Receivers. The matching network switches
automatically via TTL when the 8 metres length ACC-25A/30 control
cable is connected to the Rx.
The antenna can also be used independently with a BCU-25 battery unit
which screws into the antenna base allowing band switching via a front
panel rotary switch. Please specify how you wish to use the antenna.
The use of tuned matching transformers increases the sensitivity of the
loop whilst reducing the risk of overload across the band. A Thru-Wall
Filter (AWF-75) is available for a more permanent set-up where the ACC-25A/30 control cable has to pass
through into a chamber. The control cable then comes in two lengths. NOTE: If you need a groundplane
with the antenna, then order (Item 325A) below with it.
Specifications:
Electrical
Frequency Range: 10kHz-30Mz
Antenna Length: 104cm (41”)
Impedance:
50:
Antenna Factor: 70dB @10kHz
falling to 25dB @ 30MHz.
Mechanical:
Weight:
3.4kg (71/2lbs)
Mounting Thread: 5/8” UNC
Output Connector: BNC
Case Dimensions: 23cm x 62cm x 26cm
Case Weight incl. Item: 7.5kg
ITEM 325A
EM GPA-30 Groundplane for RVR-25/30A (item 325)
This is a 2ft square ribbed aluminum plate which can be attached to the
RVR main box with captivated screws. The calibration figures in the
handbook refer to the antenna with a “counterpoise” connected. Some
forms of testing require the counterpoise to be connected. Relative
measurements can be made without it.
Case Dimensions: 8cm x 68cm x 68cm. Case Weight: 6.5kg
ITEM 326
EMCO 3107B Parallel Element. 10kHz-30MHz 500W Maximum
This broadband antenna is used for Radiated Immunity Testing to MIL-STD-462 and DoD Specifications
(RS03) at a frequency range of 10kHz-30MHz and generates E-fields. The “E” field runs between the
elements. The device contains two transformer baluns to allow the operation of frequencies over 10kHz30MHz. Band 1. is 10kHz-5MHz and Band 2 is from 5MHz-30MHz.
A manual band switch is located at the front of the unit, allowing switchover of transformers at the
crossover frequency. The 3107 is very portable and comes supplied with a clamp mount and rod enabling
horizontal mounting over a table. A tripod (Item 800) may be needed to complete the mounting procedure.
Specifications:
Electrical:
Band One:
10kHz-5MHz
Band Two:
5MHz-30MHz
Input Impedance:
50:
Maximum Power:
500 Watts
Connector:
Type N
Mechanical:
Length:
184cm (72.5”)
Height:
5cm (2”)
Width Element Separation 61cm (24”)
Weight:
5kg (12lbs)
Case Dimensions:
68cm x 40cm x 38cm
Case Weight:
24.5kg
ITEM 327
Model AR AT3000 Parallel Element. 10kHz-30MHz. 1000W Maximum
The AR AT3000 is a wideband E-field generator from Amplifer Research Corp.. To terminate RF driver
power it uses low-inductance, high power internal load resistors. Incorporated into this instrument is a
broadband matching transformer but with no band switching. The “E” field runs between the elements. The
AT3000 is very portable and comes delivered with a clamp mount and extender rod to allow horizontal
mounting over a table for example. A tripod (Item 800) should be considered to complete the mounting
procedure. Very similar to item 326 but handling more power.
Specifications:
Electrical:
Frequency Range:
10kHz-30MHz
Input Impedance:
50:
Max Power Capability:
1000 Watts
Connector: Initially a “C” connector for high power
but adapted down to “N” for general use.
Weight:
16kg
Mechanical:
Length:
188cm (72.5”)
Width:
72cm (28”)
Case Weight:
27kg
Case (LxWxH):
84cm x 43cm x 34cm
Element Separation:
61cm (24”)
ITEM 329
Model PEF-10 LF Active Dipole - 20Hz - 50kHz . Rx only
Model PEF-10 is used to obtain radiated E-field measurements for use with the EMC-11 receiver Items104
and has a frequency range of 20Hz-50kHz. Suitable for compliance testing to
MIL-E-STD 8884 and NSA65-6. This antenna is connected to a high impedance differential amplifier.
The low impedance output of the amplifier is applied to the EMC-11 receiver via a multi-conducting 25’
cable. The receiver supplies power, grounding and calibration signal inputs to the PEF-10. This antenna
and receiver arrangement was part of the MIL-STD-462 requirement but has since done some interesting
work in measuring the ELF transmissions strengths from Rugby and cross correlating with the magnetic
loop in the far field.
Specifications:
Electrical:
Frequency Range:
20Hz-50kHz
Impedance:
50:
Output Connector:
15 pin male
Antenna Factor:
23dB(flat)
Mechanical:
Length Antenna Assembly:
89.4cm (35.2”)
Width Dipole Tip to Tip:
91.4cm (36”)
Cable Length:
7.6cm (25’)
Weight:
2.7kg (6lbs)
Sub Section: HF - VHF ANTENNAE
Schaffner CBL 6143A Bilog Antenna. 30MHz-3GHz.
ITEM 336
300Watt i/p
Another well constructed example of the combination of the
folded “X wing” and the logarithmic sections to produce the
familiar “Bilog” arrangement covering 30MHz to 3GHz. The
folded X wing reduces coupling to the chamber floor or
ceiling when in vertically polarized configuration. The
extended frequency range is useful also in the receiving mode
with good symmetry and a reasonable Antenna Factor at the
higher frequencies. See chart. A popular model amongst test
houses in recent years but take a look at item 337 its
competitor. Don’t forget to order a sturdy form of mount.
Specifications:
Electrical:
Frequency Range:
Impedance:
Output Connector:
Antenna Factor:
VSWR:
30MHz-3GHz
50:
N female
See chart right
Average 2:1
Mechanical:
Dimensions: Tip to balun end 153cm
Width of X wing:
40cm
Height of X wing:
122cm
Weight (approx):
4.2kg
ITEM 337
Electro-Metrics Bilog model EM-6917B. 26MHz-3GHz. 1kWatt i/p
The EM-6917B Biconilog Periodic Antenna combines the standard log
periodic and biconical elements to produce the customary hybrid
operating from 30MHz-3GHz for “E” field measurement and the
transmission of fields within EN61000-4-3 spectrum. It appeared about
the same time as item 336 form Schaffner. Although not calibrated
below 30MHz it will nevertheless perform down to 26MHz satisfying
the requirement on some of the older immunity specs. It is linearly
polarized permitting independent assessment of both H & V parameters
in measurement. The model hired under item 337 is actually the 6917B2 version which has collapsible cone
elements which cover the 26MHz-200MHz
portion of the spectrum. The device will need
a sturdy platform or support so unless the customer has a tripod already they are
advised to visit section 800 & select perhaps items 800 or 801. Included within
the packing box is a 0.8M rod for attachment to the tripod enabling the frame to
swing vertically without interfering with the metal elements.
Specifications:
Electrical:
Frequency Range:
Impedance:
Output Connector:
Antenna Factor:
20Hz-50kHz
50: nominal
N female
12-33dB
Mechanical:
Length Antenna Assembly: 1.53m (60”)
Width elements tip to tip: 1.02m (max)
Bicon cage tip to tip:
1.6m
Weight (assembled):
4.4kg (9.8lb)
Box dimensions: 1.32m x 1.2m x .25m
boxed weight: 30kgm
ITEM 338
Electro-Metrics Biconical Antenna EM-6912A. 20MHz-300MHz. 50w i/p
A generic bicon balun working over the prescribed range & power
handling. This balun has been modified to accept a range of 3 smaller
cages to address specific requirements for NSA using the RSM procedure
but more importantly as a transmitter in shielding tests where space is
seriously hampered, e.g. within vehicles where space is critical.
Essentially it can be ordered with one or more of three cage sizes . Photo to
right shows the EM-6912A balun with the middle size BC-M (Biconical
Cage-Middle) attached. All sizes appear in the specific cage photo namely,
BC-S; BC-M and BC-L.
From L to R the BC-S; BC-M & BC-L
Dimensions of cages to balun are:BC-S: 53cm (tip to tip). Diameter: 18cm
BC-M: 67cm Diameter: 25cm
BC-L: 88cm Diameter: 36.5cm
The standard biconical has a tip to tip of 1.3m with a diameter of 52cm.
At the lowest frequency of operation ( 30MHz) the smallest cage is about 8-10 dB down on a standard cage
but as the frequency rises toward the 300MHz end the difference becomes minimal. However, the useful
range with the smallest cage is toward the 1 GigaHertz end. The disadvantage is in the linearity of gain
over the range. However again, if spot frequencies are chosen where shielding is concerned, prudent
selection of frequencies can ensure an adequate dynamic range with just 50 watt feeding the balun.
ITEM 339
EMCO 3104/3109 Shielding Test Set. 30MHz - 300MHz
The box comprises the EMCO 3104 Bicon
antenna which can absorb 50 watt before
saturation or damage. This is used as the
receiving antenna normally placed outside the
shielding surface to be tested. A set of collapsible
cages identical with those of the transmit balun
are included. The transmit balun is that of either
the EMCO 3109 or as seen in the photo the 3108.
Both baluns are virtually identical in their size
and RF performance although the 3109 can
handle 1kWatt of input power whereas the 3108
is limited to 300 Watt. But both input powers are
more than adequate to provide the necessary
dynamic measuring ranges.
Where internal transmitting space is critical take
a look at item 338 although power handling is
somewhat reduced.
ITEM 340
EMCO 3104C Biconical Antenna 20MHz-300MHz 50 watts i/p maximum
The EMCO 3104P biconical antenna is excellently designed for simplicity
and is a good alternative to dipole antennas where elements would have to
be adjusted each time a new frequency is measured. It is extremely
lightweight and easy to handle. It comes with portable elements which can
be stowed easily when not in use. The antenna can take 50Watts i/p and so
can be used for low level field generation.
Manufactured to conform to MIL-STD-461 and other
standards and illustrated in Drawing ES-F-201286, this
antenna has had an extensive role on commercial test
sites testing to
EN55022.This antenna is often used for shielding
effectiveness testing as the balun will not overload
with higher than normal signal strengths as experienced in shielding work.
NOTE: The P after the model number denotes that a collapsible antenna cage has
been fitted instead of the fixed cage. This is for ease of transportation. The portable elements are
shown below.
Specifications:
Electrical:
Frequency Range: 20MHz-200MHz
Impedance:
50:
Power Input Capability: 50Watts continuous
100Watts short term
Connector: Type N female
Mechanical:
Weight:
2.7kg
Depth:
81cm (32.0”)
Diameter:
53cm (21”)
Case Size (LxWxD): 70cm x 53cm x 14cm
Case Weight: 6.4kg
ITEM 341
EMCO 3108P Biconical Antenna 30MHz-300MHz
EMCO model 3108 is a medium powered biconical broadband antenna
operating within a frequency range of 30-300MHz and in accordance with
DoD and Military EMI Specifications. This antenna is really for usage in
Radiated Immunity with an ability to handle 300Watts of i/p power but
Radiated Emissions tests can also be performed. It is lightweight and
portable. The elements are constructed from tack welded aluminium rods
and the 4 to 1 balun network is made of PTFE thermoplastic material with a
modified line transformer for improved impedance matching. The item
comes in a customised case which includes a flat extender mount 310 which
provides separation from a tripod (Item 800) top allowing 90 degree rotation
without hitting the legs. Extended elements (Item 342A) can be ordered with
this antenna as an option to improve transmission transfer in the 26HHz 70MHz region of operation.
NOTE: The P after the model number denotes that a collapsible antenna cage has been fitted instead of
the fixed cage. This is for ease of transportation.
Specifications:
Electrical:
Frequency Range:
30MHz-300MHz
Impedance matched to: 50:
Input Power:
300 Watts
Short Term Peak Pwr: 500 Watts
Connector:
Type N.f
Mechanical:
Length:
131.6cm (51.8”)
Diameter:
52cm (20.5”)
Weight:
2.7kg (6lb)
Case (LxWxH): 128cm x 71cm x 49cm
Case Weight + Item:
5.9kg
ITEM 342
EMCO 3109P Biconical Antenna - 20MHz-300MHz 1kW power input.
EMCO model 3109 is a high field biconical antenna and generates
high levels of EM fields. Radiated Immunity as per EN61000-4-3
is achieved using the 3109 because of its ability to handle high
power levels over a broadband. The unit uses a modified
Guanella balun for impedance transformation and matching. Very
easy to assemble and store. A customised case contains a
mounting jig to give a radial polarisation option. Your will need a
sturdy tripod (Item 800) for this antenna as seen.
NOTE: If difficulty is experienced in achieving field strength at low frequency end of test, then (Item
342A) a set of extended lengths of elements is available.
Specifications:
Electrical
Frequency Range: 20-300MHz
Input Impedance: 50:
Power i/p continuous: 2kW
Connector:
N female
Mechanical:
Length:
133cm (52.5”)
Diameter: 52cm (20.5”)
Weight: 3.2kg (7lbs)
Case: 70cm x 52cm x 21cm. Case Weight: 7kg
ITEM 342A
Model XP (Part No 103032B) Bicon Element Extenders
An extended version of the portable biconical elements is available for the
EMCO 3108 “high field” (Item 341) and the EMCO 3109 “ high
power”(Item 342) and EMCO 3108 (item 341) bicons. These folding
elements are twice as long as the standard elements. This extra length helps
to generate a higher field for the same power input at the low frequency
end of operation or a reduction of 25% power can be realised for the same
field. This could save considerably on amplifier costs. This item is an
option for the two previous items. Photo to right shows the standard bicon
sitting under the extended model.
Do consider the necessary extra height in the form of mounting. A tripod
with an extender element from section 800. Typically (Items 809 or 810)
as well as the tripod or stand.
Mechanical:
Diameter (when spread):
76cm Width:
122cm each set
Weight:
1.8kg each set.
ITEM 343
EMCO 3110P Biconical Antenna 30MHz-300MHz
Rx only
Model 3110P is a high performance receiving antenna only. The balun,
feedline, and element housing give the 3110P response curves that are almost
linear, making it ideal for swept measurements. It uses an unbalanced-tobalanced txfm with ferrites along the feedline to eliminate any V-to-H changes
with polarisation.
NOTE: The P after the model number denotes that a collapsible antenna
cage is used instead of the fixed cage. This is for ease of transport. The
portable elements are shown in the description of the Model 3104, (Item
340).
Specifications:
Electric
Frequency Range:
30-300MHz
Impedance matched to: 50:
Connector:
Type “N”.
Generic Antenna.F.
See table to right
Mechanical
Assembled Length: 132.1cm (52.0”)
Element Diameter: 50.8cm (20.0”)
Balun Depth Max:
55.9cm (22.0”)
Power Capability:
See handbook
Weight:
2.7kg (6lb)
Casing Dia (LxWxH): 70 cm x 43cm x15cm
Casing Weight:
5.5kg
ITEM 344
EMCO 3142 Biconilog Antenna 26MHz-2GHz - 300 Watt
Model 3142 biconilog is a hybrid linearly polarised antenna and
makes measurements from 26MHz to 2GHz in one sweep. The
biconilog comprises a Log Periodic Dipole Array (LPDA) and a
single “bow-tie” antenna. This usual design effectively couples
the LP and biconical frequency ranges. Ideally suitable for
EN61000-4-3 Immunity Testing and ANSI C63.4, FCC-18 plus
EN 55022 for Emissions Testing. The antennas mounting bracket
will fit on to a number of adaptors. The NCTM-155 (Item 806)
can be used to set a transmission height of 1.55 metres. The
AMB-9208/E is used for attaching to a 2” sq. mast boom in the
receive mode. Antenna factors, gain, calibration data and method
of operation is included with each antenna. Please advise which
mount you require. A generic antenna factor chart is shown
below for this design of antenna at 3m spacing.
Specifications:
Electrical:
Frequency Range: 26MHz-2GHz
Impedance:
50ȍ
Max Continuous Power: 300W
Antenna Factor: See chart to right
Connector:
Type N female
Mechanical:
Length:
75.0cm (29.5”)
Width:
135.0cm (53.1”)
Boom Depth: 90.0cm (35.4”)
:
Weight:
4.0kg (8.8lb)
Case Dimensions: 138cm x 119cm x 21cm
Case Weight incl. Item: 31kg
ITEM 345
Chase CBL6111 Bilog Antenna 30MHz-1GHz 300 Watt
The Chase CBL6111 can be used for emission and immunity
measurements in a frequency range of 30MHz to 1GHz. This antenna
eliminates a time-consuming antenna changeover throughout testing.
With a unique matching network it can allow powers of 130W to be
transmitted in immunity testing with fields of 3V/m modulated. Suitable
for internal and external use. This is a medium weight but very robust
antenna and can be mounted on tripods and manual/automatic masts.
Specifications:
Electrical
Frequency Range:
Antenna Factor:
Impedance:
Continuous max i/p:
30MHz-1GHz
See chart to right, 3m
50:
150Watt
Mechanical
Size (LxWxH):
142cm x 139cm x 10cm
Case Size (LxWxH): 154cm x 86cm x 20cm
Case Weight inc. Item: 30kg
ITEM 346
EMCO 3141 ”T” HIGH GAIN FRAME BILOG 26MHz-2GHz 300W
Model 3141T biconilog is a hybrid linearly polarised
antenna and takes measurements from 26MHz to 2GHz
in one sweep. The biconilog comprises a Log Periodic
Dipole Array (LPDA) and a single
“bow-tie” antenna with a “HIGH GAIN FRAME”
attached to each bow tie. This frame design effectively
exhibits a 5.5dB average improvement between 26 and
60MHz (just where it’s needed). Ideally suitable for
EN61000-4-3 Immunity Testing and with “FRAMES”
removed it behaves the same as a 3142 (Item 344)
handling all Emission Testing. The antenna mounting
bracket will fit on to a number of adaptors. The NCTM155 (Item 806) can be used to set a transmission height of
1.55 metres. Similarly, the 6-TR heavy duty will oblige (Item 805). The AMB-9208/E is used for attaching
to a 2 inch sq. mast boom in the receive mode (without frames). Antenna factors, gain, calibration data and
method of operation is included with each antenna. Please advise which mount you require.
Specifications:
Electrical
Frequency Range:
26MHz-2GHz.
Impedance:
50:
Continuous max i/p:
600Watt-up-to-60MHz,
and 1kW above 60MHz.
Antenna Factor: In handbook or refer to item 344
Mechanical
Width:
Weight:
Depth:
Adapter:
Height:
137cm
6.7kg
132cm
“N” female
76cm
ITEM 347
Schwarzbeck VUBA 9117/9135 Miniature Bicon Antenna 30MHz-1GHz 10 Watt
The calibrated biconical test antenna 9117 is equipped with the largest
cone elements that permit operation up to 1GHz (length tip-to-tip
450mm). With a gain maximum at 230MHz it corresponds roughly to a
tuned dipole. At 60MHz and 1GHz the AF is roughly 33dB/m. As a
calibration device it will have a fixed phase centre
and be omni-directional in the vertical plane. The
device is used by us for the NSTL & NSA test for
FARs & OATS. This item and a bilog form the
antenna combination required for typically 7m x 4m
x 3m chambers. The calibration figures supplied are
over GP and at a distance of 3 metres. When used as
part of a calibration device a 10dB pad is recommended to prevent mismatch.
Specifications:
Electrical
Frequency Range:
30MHz-1GHz
Antenna Factor:
See chart right.
Impedance:
50:
Continuous max i/p:
10Watt
Mechnical
Balun Length: 516mm
Balun Dia:
22mm
Size LxWxH: Cage tip to tip: 445mm
Cage diameter: 183mm
Case Dimensions (LxWxH):71cm x 31cm x
25cm
Case Weight inc.Item: 15kg
ITEM 348
Chase CBL6141A “X WING” Bilog Antenna 80MHz-2GHz 300 Watt
The Chase CBL6141A can be used for
emission and immunity measurements
in a frequency range of 80MHz to
2GHz. This antenna eliminates a timeconsuming
antenna
changeover
throughout testing. With a unique
matching network it can allow powers
of 150W to be transmitted in immunity
testing with fields of 10V/m. Suitable for internal and external use.
This is a very compact antenna and ideal for FARs of 3 metre widths and 4 metre height. As a receiving
antenna there are calibration figures down to 30MHz although the performance is not as good as standard
Bicons & Bilogs.
Specifications:
Electrical
Frequency
Antenna Factor:
Impedance:
Continuous max i/p:
Range:80MHz-2GHz
See chart left
50:
300Watt
Mechanical
Size (LxWxH): 142cm x 139cm x 10cm
Case Dimensions :154cm x 66cm x 20cm
(LxWxH)
Case Weight inc. Item: 30kg
ITEM 349
Schwarzbeck VUBA 9116/9139 Miniature Bicon Antenna 150MHz-1.2GHz 10 Watt
The calibrated new balun 9117 is used with the 9139 elements with
the smaller cones that permit operation up to 1.2GHz (length
330mm). This now emulates the performance of the UBA 9116
balun, hence the title above. With a gain maximum at 280MHz it
corresponds roughly to a tuned dipole. As a calibration device it will
have a fixed phase centre and be omni-directional
in the vertical plane. The calibration figures
supplied are free field. When used as a calibration
device a 10dB pad is recommended to prevent
mismatch.
Specifications:
Electrical
Frequency Range:
150MHz-1.2GHz
Antenna Factor:
See curve to left.
Impedance:
50:
Continuous max i/p:
10Watt
Mechnical
Balun Length: 516mm
Balun Dia:
22mm
Size LxWxH: Cage tip to tip: 330mm
Cage diameter: 163mm
Case Dimensions
(LxWxH):
67cm x 28cm x 20cm
Case Weight inc.Item: 9kg
Sub Section: VHF-UHF ANTENNAE
ITEM 350
EMCO Model 3121C Dipole Set - 28MHz-1GHz - Rx only
This adjustable dipole antenna system is almost identical to the
optimally matched & compensated balun design engineered by
W. K. Roberts of the FCC Laboratory. It is used to make
precise EMI measurements to meet Military, DoD, VDE,
ANSI C63.4 and EN Specifications. They come in a
transportation case housing all the antenna components and
included is a measuring tape to enable adjustment of the dipole
elements. For operation at lowest frequencies the dipole
elements are constructed from nickel plated brass elements and
four extension rods. The set of elements can be screwed into
the pertinent balun. The baluns can also tolerate 50 Watts
enabling the model to be used in a transmission mode for
example. The antenna factor graph shown concatenates the
curves of all four baluns & their optimum extensions.
Specifications:
Electrical:
Frequencies: DB-1 28-60MHz
DB-2 60-400MHz
DB-3 140-400MHz
DB-4 400-1000MHz
Impedance: Matched to 50ohms
Max Length: 17’
Max Power input: 50Watts
Connector:
Female type N
This kit comprises:
Carrying Case: 66cm x 48cm x 21cm
Weight:
13kg
Ancillary Equipment: 1 x support rod, 4 x baluns (DB1, DB2, DB3, DB4), 4 fixed elements extensions, 2
HF elements (telescopic), 2 MF elements (telescopic), 1 x 5 metre tape measure and a, 1 x HF ruler for
DB4.
ITEM 350A
EMCO Model 3121C Dipole Set - 28MHz-1GHz - Rx only (Double Set)
As for Item 350 but a double item. Typically used for Site Attenuation reading.
ITEM 352
Model EM TDA-25 Dipole Set - 25MHz-200MHz (Double Unit) Tx & Rx
This antenna is designed for operation with any 50: receiver (Section 100). Ideal
for EN55022 Spot Frequency Emission Testing Measurements. The two sets of
telescopic elements plus fixed length extensions are made from stainless steel.
Adjustment dipoles are set by the Frequency Conversion
Scale. The TDA-25 is designed to operate with two
different sized sets of adjustable elements plus fixed
extensions. The smaller set covers 100-200MHz. The
larger set of adjustables covers 45-100MHz. This is then
extended down to 30MHz with a fixed extension. A
handbook provides the AF’s and comprehensively
instructs the end user how to assemble and measure with
the TD-25. Mounting is achieved by the balun arm sitting in an AMT-25 “cup”
which has a 5/8UNC f recess attaching to any number of our devices with a 5/8 UNC stud.
Note: This LF dipole set can be paired up to 1GHz by choosing (Item 353) the TDS-25, which covers
200MHz to 1GHz.
Specifications:
Electrical:
Frequency Range: 25MHz-200MHz
Impedance:
50
Calibrated Freq. Range: 30-200MHz
Connector:
TNC/BNC
Mechanical
Element width: Adjustable
Balun length:
45cm
Case Size (LxWxH): 80cm x 80cm x 17cm
Case Weight incl.item: 14Kgm
ITEM 353
Model EM TDS-25 - Tuneable Dipole Set - 200MHz-1GHz (Double Unit) Tx & Rx
Also designed to be used with any 50ȍ receiver (Section 100). Ideal for EN55022/ FCC/ VDE Spot
Frequency Emission Testing. Tunable dipoles are generally used as
reference antennae. The outputs from other linearly polarised antennae in the
verification/certification process have to be correlated with the results from
the tuned dipole. A handbook provides the AF’s and comprehensively
instructs the end user how to assemble and measure with the TDS. Mounting
is achieved by the balun arm sitting in an AMT-25 “cup” which has a
5/8UNC (f) recess attaching to any number of our devices with a 5/8 UNC
stud.
Note: This UHF dipole set can be paired down to 25MHz by choosing
(item 352) the TDA-25 set which covers 25MHz-200MHz.
Specifications:
Electrical:
Frequency Range:
200MHz-1000MHz
Frequency TDS-25-1: 200MHz-500MHz
Frequency TDS-25-2: 500MHz-1000MHz
Impedance:
Matched to 50:ntenna
Output Connector:
“N”
Mechanical:
Height:
TDS-1 58.4cm (23”)
TDS-2 45.7cm (18”)
Element length:
Adjustable.
Case Size (LxWxH): 107cm x 46cm x 17cm
Case Weight incl.item: 9Kgm
ITEM 356
Model EM BDA-25 - Broadband Dipole 20MHz-200MHz (Double Unit) Tx & Rx
The BDA-25 broadband dipole antenna is another device used for measuring
field strength. It has 3 fixed band tuned screw-on extension elements. Its 2.5cm
diameter elements broaden the response performance, thus avoiding continuous
adjustment to the elements (as with telescopic high Q dipoles). A balun
transformer is included within its structure. The
conversion factor from dBμV to dBμV/metre
ranges from 0dB @ 30MHz to 17dB @
200MHz (but this is only achieved with the full
extension). The manufacturers provide several AF’s relating to the number
of elements used as seen in the chart below. Mounting is achieved by the
balun arm sitting in an AMT-25 “cup” which has a 5/8UNC ‘f’ recess
attaching to any number of our devices with a 5/8 UNC stud.
Specifications:
Electrical:
Frequency Range: 20MHz-200MHz
Impedance:
50:
Antenna Factor: In handbook
Mechanical:
Length Main:
48.0cm (19”) 100-200MHz
Length Extensions:
53.0cm (21”) 45-100MHz
Case Dimensions (LxWxH):107cm x 48cm x 18cm
Case Weight incl item: 12.4 Kgm
Sub Section: UHF-MICROWAVE ANTENNAE
ITEM 364
EM Model 6969 Horn Antenna. 6 -18 GHz. 50Watt continuous i/p power.
The EM-6969 is a fairly wide band horn antennas designed for
use in both Immunity & emissions testing within the above
range of 6GHz-18GHz. Linearly polarised with medium gain
and a nominal VSWR over the stated operating frequency
range. They can be used easily with a fixed antenna factor
over the above range using 33dBs.and a gain of 13-20 dBi
nominal.
The Horn comes with a circular mounting plate with right
angle locating holes. The butterfly wing nut allows it to be
rotated through 90 degree angles. The bracket screws onto a
1/4 UNC thread compatible with our mounts.
Specifications:
Electrical
Frequency Range: 6GHz-18GHz
AF dB(1/m)
33dB/m ave, see curve
VSWR W/feed: 2:1 nominal
Max Cont Power: 50Watts
(700v/m) @ 1 metre
Connector Type: N(f) adapted up from SMA.
Mechanical
Height:
8cm
Width:
11cm
Length:
19.3cm ex bracket.
Weight:
1.0Kgm
ITEM 364A
EM Model 6969 Horn Antenna. 6-18 GHz.
A double set of the Horns from item 363 above. They arrive boxed with
a handbook for each horn with AF’s and gain figures. The “L” bracket
mount is also included.
Case Dimensions: 48cm x 34cm x 16cm.
Case Weight: 3.8Kgm.
ITEM 365
Rohde & Schwarz HE-200 Hand Held Antenna Kit. 200MHz-3GHz
This handy and extremely broadband Active Directional Antenna, the HE200 in conjunction with a variety
of receivers or spectrum analysers from section 100 makes an ideal tool for identifying sources of
unwanted interference. The overall frequency range in this particular version is from 200MHz-3GHz. And
is enables by attaching the appropriate transducer head to the pistol grip.
Specifications:
Electrical
Frequency Range:
200MHz-3GHz
VSWR W/feed:
1.3
Connector Type:
N(f)
Mechanical
Height:
Width:
Depth:
Weight:
40cm
53cm
88cm
8Kgm
ITEM 366
EMC Model 1010 Octave Horn Antenna. 1-2GHz. 200 Watt continuous i/p power.
This model 1010 is a stand-alone microwave octave horn antenna designed
for use in Immunity testing within the frequency range of 1-2GHz.
Linearly polarised, with medium gain, and a nominal VSWR over the
recommended operating frequency range. It can be used easily with a fixed
antenna factor over the range. AF: 25dBs.and a gain of 16.8dBi
mounting is with a 5/8unc skt. on two 90 degree threads
Specifications:
Electrical
Frequency Range:
AF dB(1/m)
VSWR W/feed:
Max Cont Power W:
Connector Type:
1GHz-2GHz
25dBs Ave.
1:2
200Watts
N(f)
Mechanical
Height:
Width:
Depth:
Weight:
24cm
34cm
42cm
3.5Kgm
ITEM 367
EM Model 7020 Horn Antenna. 1-2.5GHz. 200 Watt continuous i/p power.
The EM model 7020 is the first of a set of three octave horn antennas
designed for use in Immunity testing within the frequency range of 12.5GHz. Linearly polarised, with medium gain and a nominal VSWR
over the recommended operating frequency range. They can be used with
a fixed antenna factor over the range. AF: 21dBs.and a gain of 13.3dBi
Specifications:
Electrical
Frequency Range:
AF dB(1/m)
VSWR W/feed:
Max Cont Power W:
(700v/m) @ 1 metre
Connector Type:
Mechanical
Height:
Width:
Length:
Weight:
1GHz-2.5GHz
See Chart at right
2:1.
200Watts
N(f)
40cm
30cm
44.cm
5.4Kgm
ITEM 368
EM Model 7021 Horn Antenna. 2 - 5GHz. 200 Watt continuous i/p power.
The EM model 7021 is the middle of a set of three octave horn
antennas designed for use in Immunity testing within the frequency
range of 2-5GHz. Linearly polarised, with medium gain and a nominal
VSWR over the recommended operating frequency range. They can
be used with a fixed antenna factor over the range. AF: nominally
26dBs.and a gain of 13.3dBi The 26 degree beamwidth in both
polarisation planes is ideally suited to illuminate larger EUTs. These
antennae have a detachable coax-to-waveguide feed, but come fitted
ready to use with precision “N” connector, mounting is with a 5/8unc
skt. on a 90 degrees swivel bracket.
Specifications:
Electrical
Frequency Range:
2GHz-2.5GHz
AF dB(1/m)
26. Ave, see curve
VSWR W/feed:
2:1
Max Cont Power W:
200Watts
(700v/m) @ 1 metre
Connector Type:
N(f)
Mechanical
Height:
Width:
Length:
Weight:
15.7cm
20cm
21cm
1Kgm
ITEM 369
EM Model 7022 Horn Antenna. 4 -10 GHz. 200 Watt continuous i/p power.
The EM model 7021 is the middle of a set of three octave horn
antennas designed for use in Immunity testing within the frequency
range of 2-5GHz. Linearly polarised, with medium gain and a
nominal VSWR over the recommended operating frequency range.
They can be used with a fixed antenna factor over the range. AF:
nominally 32dBs.with a gain of 14.5dBi
The 26 degree beamwidth in both polarisation planes is ideally
suited to illuminate larger EUTs. These antennae have a detachable
coax-to-waveguide feed, but come fitted ready to use with precision
“N”.Mounting is with a 5/8unc skt. on a 90 degree swivel bracket.
Specifications:
Electrical
Frequency Range:
AF dB(1/m)
VSWR W/feed:
Max Cont Power W:
(700v/m) @ 1 metre
Connector Type:
Mechanical
Height:
Width:
Depth:
Weight:
4GHz-8GHz
32dB
2:1
200Watts
N(f)
10.7cm
8.2cm
12.5cm
0.6Kgm
ITEM 370
EMCO 3146 - Log Periodic Antenna - 200MHz-1GHz - 1kW
The 3146 log periodic antenna is a linearly polarised broadband antenna
and designed to be used for EMC Emissions and Immunity Testing. The
broadband antenna is ideally suited to swept measurements. The
attributes of the log periodic are well known and it has seen service in
commercial testing for thirty years or so. This particular model is
lightweight and compact and once calibrated can be relied upon to
maintain its performance. The elements are not so prone to bending as
with the larger biconilogs. Due to their frequency coverage and design
they are naturally directional. They come in a custom fitted case with
handbook and attaching mounts. Check that you can mount the device
effectively.
Specifications:
Electrical
Frequency Range:
Nominal Impedance:
Max. Cont. Power:
200MHz-1GHz
50:
1kW
Mechanical:
Length:
Width:
Depth:
Weight:
75cm (30”)
75cm (30”)
6.4cm (2.5”)
1.8Kgm
ITEM 370A
EMCO 3146 - Log Periodic Antenna - 200MHz-1GHz - 1kW (Set of Two)
ITEM 371
EMCO 3146A Log Periodic Antenna 300MHz-1GHz - 1kW
The model 3146A log-periodic antenna is a linearly
polarised broadband antenna made to operate over the
frequency range of 300MHz-1GHz. The device is suitable
for both Immunity & Emission testing and capable of
handling 1kW of power. Almost identical in design to the
3146 it has traded off some of the lower frequency coverage
but gained a reduction in physical size. It now sees usage for
Shielded Room testing where space is of the essence. This
antenna comes readily assembled and no adjustments are
necessary to its structure. A customised case contains a
handbook, antenna factors and a fixing mount for either a ¼”
UNC or a 5/8UNC. The calibration details are within the
handbook and generically shown to right.
Specifications:
Electrical
Frequency Range:
Nominal Impedance:
Max. Cont. Power:
Peak Power:
Average VSWR:
Connector:
Antenna Factors:
Typical figures below are @10m over a GP.
300MHz-1GHz
50:
1kW
1.3kW
less than 1: 2.5
Type N female
See to right.
Mechanical:
Length:
57.2cm (22.5”)
Max. Width:
48.3cm (19”)
Depth:
18cm (2.5”)
Weight:
1.4kg (3lb)
Case Size:
74cm x 59cm x 12cm Case
Weight incl. Item:
10kg
ITEM 371A
EMCO 3146A Log Periodic Antenna 300MHz-1GHz - 1kW (Set of Two)
ITEM 372
EMCO 3101 Log Conical Spiral Antenna 200MHz-1GHz - 100W Max.
Model 3101 is a circularly polarized conical log-spiral broadband
antenna. The characteristics exhibit a low VSWR with a moderate
gain. This design came from the MIL-STD and SAE arena but
some of its advantages have been utilised commercially. As an
example, it can be used to quickly scan the emission profile in one
sweep as it is equally sensitive in both planes. Similarly with the
immunity. On a similar theme, it can be mounted vertically wrt the
ground and then used as an omni-directional horizontally polarised
antenna for surveillance or survey. 3101’s will receive both
circular and linear polarised waves (the linear is about 3dB down).
Specifications
Electrical:
Frequency Range:
200MHz-1GHz
Impedance:
Nominal 50:
Polarisation:
Circular, left hand
Max. Cont. Power:
100 Watts
Short Term Peak Power:150 Watts
Connector:
Type N female
Antenna Factor:
See chart right. @1m
Mechanical:
Length:
81.3cm (32”)
Diameter:
33cm Max 13”
Weight:
4.5kg (10lbs)
Case Dimensions:
84cm 37cm x 42cm
Case Weight incl. Item: 18kg.
Mounting: GPRB Cup supplied with 5/8unc receptacle. (as shown in photo)
ITEM 373
EMCO 3102 Log Conical Spiral Antenna 1GHz - 10GHz. 50W Max
Model 3102 is very similar to model 3101 (refer to Item 372) but
has a greater frequency range and is smaller in size. The typical
gain, 3dB beamwidth and axial ratio data is shown in the handbook.
The gain data shown was from measurements with two identical
antennas spaced 1.0 metre apart, tip to tip. Construction details are
also the same as Item 372. Typical antenna factors are: 1GHz-25dB
rising to 48dB at 10GHz.
Specifications:
Electrical:
Frequency Range:
1GHz-10GHz
Impedance:
Nominal 50:
Polarisation:
Circular, Left Hand
Input Capability:
50Watts continuous
Power, 100Watts short term peak
Connector:
Precision N (f)
Antenna Factor:
See typical to right
Mechanical:
Length:
Diameter:
Weight:
Case Dimensions
Case Weight incl. Item:
Base Attachment:
38.1cm (15”)
12.7cm (5”) max
3.63kg (8lbs)
57cm x 34cm x 35cm
7kg
1/4unc and 5/8unc.
ITEM 375
EMCO 3115 Double Ridged Guide 1GHz-18GHz - 300W Max
Model 3115 double ridged guide is a linearly polarised broadband
antenna with an excellent gain and good VSWR characteristics. The
frequency range is 1GHz-18GHz. It was designed and built especially
for EMI measurements and specifications in compliance testing. The
antenna is small, very portable and lightweight. Precision machined
from aluminum with side plates of copper clad, gold plate tracking on
epoxy fibreglass (G-10). The 50:, precision high frequency type N
connector is mounted on the base block of the antenna. This connector
can handle considerable power with low losses above 12GHz. A
bracket is provided for the standard tripod mounting in either V or H
polarisation. Full spec in handbook. Bracket Mount is 1/4unc.
Typical antenna factors can be seen to the right hand side on the chart.
Specifications:
Electrical:
Frequency Range:
Impedance:
Max Power Cont.:
Peak Power:
Front to Back Ratio:
Cross Polarisation:
Connector:
1GHz-18GHz
50:
300Watt
500Watt
20dB
20dB min.
Precision N f
Mechanical:
Width:
Height:
Length:
Weight:
Case Dimensions:
24.4cm (9.6”)
15.9cm (6.25”)
27.9cm (11”)
1.8kg (4lbs)
41cm x 44cm x 28cm. Case Weight incl Item:
5kg
ITEM 375A
EMCO 3115 Double Ridged Guide 1GHz - 18GHz . (Set of 2)
ITEM 377
EMCO 3116 - Double Ridged Guide 18GHz - 40GHz.
50W Max
Model 3116 double ridged guide antenna is a linearly polarised
broadband antenna covering the frequency range of 18GHz-40GHz.
Designed and built specifically for Emission and Susceptibility
testing. It is highly portable small and lightweight. The antenna is
precision machined from aluminum. A high frequency 50: type
K(f) connector is mounted on the base block of the antenna. The
gain figures and calibration details may be seen below & in the
handbook. NOTE: From the right angled mount two screws are
loosened allowing 90 degree rotation. See Rosenberger items 748753 for correct coaxial cable usage. Avoid unnecessary coax lengths
as losses can be somewhat considerable at these frequencies.
Specifications:
Electrical
Frequency range:
18GHz-40GHz
Impedance:
50:
Front to Back Ratio: 20dB
Cross Polarisation: 20dB min
Rated i/p Power:
50 Watts
Connector:
Type K(f)
Antenna Factor:
See curve to right.
Mechanical
Width:
13cm (5.2”)
Height:
6cm (2.4”)
Length:
10cm (4”)
Weight:
135gms (4.75ozs)
Case dimensions: (LxWxH): 32cm x 29cm x 11cm. Case Weight: 1.5kg
ITEM 377A
EMCO 3116 - Double Ridged Guide 18GHz - 40GHz. (Set of 2)
These antennae are identical to the one described in Item 377. They are
supplied as a transmit/receive pair for use in setting up specific fields.
Be sure to order the correct length and type of coaxial cable you will use
with the device. Items 748-753.
ITEM 379
EMCO 3147 - Log Periodic Antenna 200MHz-5GHz
80W Max
Model 3147 log periodic dipole antenna is a linearly polarised,
ultra broadband antenna designed to operate over the frequency
range of 200MHz to 5GHz for EMC emission and immunity
measurements. Designed for the latest revision to Part 15 of FCC
rules and regulations. It exhibits high gain, low VSWR and good
beamwidth pattern. Easy to mount, lightweight, polarisation is
easily changeable and excellent for automated measurements.
Specifications:
Electrical
Frequency Range: 200MHz-5GHz
Impedance:
50:
Max I/P power Continuous: 80W @ 1GHz;
40W @ 5GHz
Max Peak Input Power: 100W @ 1GHz;
50W @ 5GHz
VSWR Average: 1.2:1
Connector:
N female
Mechanical
Height:
Width:
Depth:
Weight:
3.1cm
92.0cm
75cm
2kg
ITEM 381
EMCO Model 3160-07 Horn Antennae 8.2GHz - 12.4GHz (Set of 2)
The EMCO models 3160-07 to 3160-08 are examples of a set of
pyramidal standard gain horn antennae designed for use in
Immunity Testing. Linearly polarized, medium gain, half power
beamwidth (equal in both horizontal and vertical planes) and a
very low VSWR over the operating frequency range. They can
be used easily with a fixed antenna factor over the range. Pairs
of antennas are also used in shielding effectiveness tests. Its
performance is precise and predictable through design
parameters. Input and output of the antenna are matched from
50: to 377: respectively. Comparison on measured versus
computed gain and antenna factors of the EMCO horns have
been found to be within r 0.5dB. Therefore, such antennas are
considered to be the standard reference for measurements above
1GHz. As per ANSI C63.4. The 3dB beamwidth in both polarisation planes is very nearly equal at
approximately 30 degrees. These antennae have a detachable coax-to-waveguide feed, but come fitted
ready to use with precision “N”. Mounting is with ¼ UNC receptacle on two brackets at 90 degrees. They
are itemized as a set of two, as seen above.
Specifications:
Electrical
Frequency Range:
AF dB(1/m)
VSWR W/feed:
Max Cont Power:
Connector Type:
Mechanical
Height:
Width:
Length:
Weight:
8.2GHz-12.4GHz
33.50., (17.1dBi)
1.3
250 W (500v/m)
p N(f)
6.26cm
8.06cm
22.6cm
0.43kg
ITEM 382
EMCO Model 3160-08 Horn Antennae 12.4GHz - 18GHz (Set of 2)
The EMCO models 3160-08 follows on from item 381 taking the
frequency on up to 18GHz. As with the 3160-07
the 3 dB
beamwidth in both polarisation planes is very nearly equal at
approximately 30 degrees. These antennae have a detachable coaxto-waveguide feed, but come fitted ready to use with precision “N”.
Mounting is with ¼ UNC receptacle on two brackets at 90 degrees.
Electrical
Frequency Range: 12.4GHz-18GHz. 16.7dBi. AF: 37.1dB.
Impedance: 50:
Max i/p Power: 200 W
Connector: Precision N f
Mechanical
Height: 4.2cm
Width: 5,54cm
Depth: 14cm
Weight: 0.28kg
ITEM 384
EMCO 3148 Log Periodic Antenna 200MHz – 2GHz 1kW
The model 3148 is ideally suited for most types of EMC
testing. Common applications include ANSI C63.4, FCC-15,
FCC-18 and EN55022 Emissions Testing and EN61000-4-3
Immunity Testing. The antenna can withstand a peak power of
1.3kW. It has an average VSWR of 1.2:1. This model is one of
the later EMCO designs addressing the inevitable extension in
upper frequency testing. Check on methods of mounting, (see
Section 800). It comes fitted with a 90 Deg swivel mount
which interfaces with a 15” Delrin rod on an aluminum base
with a 5/8 unc receptacle, as shown here.
Electrical
Frequency Range: 200MHz-2GHz
Impedance:
50:
Max i/p Power Continuous: 1kW
Max Peak Input Power:
1.3kW
Connector:
N female
Mechanical
Height:
Width:
Depth:
Weight:
6.4cm
85.6cm
73.7cm
2.0kg
ITEM 385
EM 6952 Log Periodic Antenna 1GHz–18GHz (continuous power: 5watt)
The EM-6952 log periodic antenna is a linearly polarised broadband
antenna operating from 1 to 18GHz and can be used as either a
transmitting (low power) or receiving antenna. It comes with a handbook
providing AF; gain dBi and gain numeric. Typical figures show the AF of
25dBs at 1GHz; 44dBs at 10GHz and falling off to 53dBs at 18GHz. Cal
figures are actually shown up to 20GHz. What is special about this log
periodic is its small size. It could be used in Shielding Effectiveness
Testing where space is at a premium although its limited to 5 Watt i/p.
Another role is in Field Uniformity Testing. Unlike the double ridge guide
antennas there is a wider beam width. Average beamwidth is 70 degrees
in the “E” plane and 125 degrees in the “H” plane.
Specifications:
Electrical
Frequency Range: 1GHz-18GHz
Impedance:
50: nominally
Max i/p Power Continuous: 5W
Connector:
pN female
Average VSWR: 3:1
Mechanical
Length:
26cm
Width:
20.3cm
Depth:
3.2cm
Weight:
454gm(1lb)
Mounting:
¼ unc camera.
ITEM 385A
EM 6952 Log Periodic Antenna 1GHz–18GHz (Set of 2)
Same device electrically and mechanically as described in
Item 385 but supplied as a pair. Included with either one or
two of the 6952’s is a 90 degree swivel mount which then
attaches to any mount using a ¼ UNC camera thread. This is
useful for polarization changes without having to unscrew
the bracket.
ITEM 387
EMCO Model 3161-01 Octave Horn Antenna. 1-2GHz. 550Watt continuous i/p power.
The EMCO model 3161-01 is the first of a set of three microwave
octave horn antennas designed for use in Immunity testing within
the frequency range of 1-2GHz. Linearly polarised, with medium
gain, half power beamwidth (equal in both horizontal and vertical
planes) and a nominal VSWR over the recommended operating
frequency range. They can be used easily with a fixed antenna
factor over the range. AF: 17.5dBs.± 2dBs and a gain of 16.7dBi.
(average). An informative handbook is enclosed.
The 26 degree beamwidth in both polarisation planes is ideally
suited to illuminate larger EUTs. These antennae have a detachable
coax-to-waveguide feed, but come fitted ready to use with a
precision “N”connector. Mounting is with a 5/8unc skt. on two brackets at 90 degrees. Take care when
mounting due to weight.
Specifications:
Electrical
Frequency Range:
1GHz-2GHz
AF dB(1/m)
17.5 average
VSWR W/feed:
1.3
Max Cont Power W:
550Watts
(700v/m) @ 1 metre
Connector Type:
N(f)
Mechanical
Height:
40cm
Width:
53cm
Depth/length:
88cm
Weight:
8Kgm
ITEM 388
EMCO Model 3161-02 Octave Horn Antenna. 2- 4GHz. 250Watt continuous i/p power.
The EMCO model 3161-02 is the second of a set of three horn
antennas designed for use in Immunity testing within the
frequency range of 2-4GHz. Linearly polarised with medium
gain half power beamwidth (equal in both horizontal and vertical
planes) and a nominal VSWR over the recommended operating
frequency range. They can be used easily with a fixed antenna
factor over the range. A nominal AF is 22.3dBs. with a gain of
17.5dBi. The 22 degree beamwidth in both polarisation planes is
ideally suited to illuminate larger EUTs. These antennae have a
detachable coax-to-waveguide feed, but come fitted ready to use
with precision “N”. Mounting is with ¼ UNC receptacle on two
brackets at 90 degrees.
Specifications:
Electrical
Frequency Range: 2-4GHz
AF dB(1/m)
22.3dBs
VSWR W/feed: 1.3
Max Cont Power: 250Watts (500v/m) @ 1m
Connector Type: Prec.N(f)
Mechanical
Height:
Width:
Depth:
Weight:
Waveguide:
34.6cm
23.2cm
59.3cm
5Kgm
WR320
ITEM 389
EMCO Model 3161-03 Octave Horn Antenna. 4-8GHz. 250Watt continuous i/p power.
The EMCO model 3161-03 is the third of a set of three horn antennas
designed for use in Immunity testing within the frequency range of 48GHz. Linearly polarised, with medium gain, half power beamwidth
(equal in both horizontal and vertical planes) and a very low VSWR
over the recommended operating frequency range. They can be used
easily with a fixed antenna factor over the range. AF: 28.3dBs and a
gain of 17.5dBi. The 22 degree beamwidth in both polarisation planes
is ideally suited to illuminate larger EUTs. These antennae have a
detachable coax-to-waveguide feed, but come fitted ready to use with
precision “N”. Mounting is with ¼ UNC receptacle on two brackets at
90 degrees as seen in picture.
Specifications:
Electrical
Frequency Range: 4GHz-8GHz
AF dB(1/m)
28.3 See chart to right.
VSWR W/feed: 1:1.3
Max Cont Power: 250Watts (500v/m) @ 1 m
Connector Type: p N(f)
Mechanical
Height:
11.7cm
Width:
17.5cm
Depth/length: 32cm
Weight:
2Kgm
ITEM 390
EMCO Model 3160-09 Standard Horn Antenna. 18GHz – 26.5GHz. 50Watt continuous i/p power.
The EMCO model 3160-09 is a medium gain horn antenna designed
for use in Immunity testing within the frequency range of 1826GHz. They also have a role in shielding effectiveness testing
when used as a pair (item390A). They are linearly polarised, with
medium gain, half power beamwidth (equal in both horizontal and
vertical planes) and a nominal VSWR over the recommended
operating frequency range. They can be used easily with a fixed
antenna factor over the range. The AF is 40.3dB and the gain is
16.8dBi. Both input to output are well matched to 50 : & 377 :
respectively. Comparison of measured to computed gain & AF are
generally well within half a dB and therefore can be considered as a
standard for measurements within their operating bandwidth.
The 27 degree beamwidth in both polarisation planes is ideally
suited to illuminate larger EUTs. These antennae have a detachable
coax-to-waveguide feed, but come fitted ready to use with a “K”(f) connector. Mounting is with ¼ UNC
receptacle on two brackets at 90 degrees. Power handling in its present configuration is limited to 50 Watts.
If the end user can couple direct via the waveguide then the horn can accept up to 10,000 Watts. See
section 700 for coaxial connection. Items 748-753
Specifications:
Electrical
Frequency Range:
AF dB(1/m)
VSWR W/feed:
Max Cont Power W:
(220v/m) @ 1 metre.
Connector Type:
K (f)
Mechanical
Height:
Width:
Depth:
Weight:
2.95 cm
3.84 cm
10.49cm
110 gm
18GHz-26.5GHz
40.3 average
1.3
50Watts
ITEM 390A
EMCO Model 3160-09 Standard Horn Antenna. 18GHz – 26.5GHz.
The same individual specification as for item 390 but
customer receives two 3160-09s. Typical application here
would be for shielding effectiveness where a transmit &
receive antenna are preferably of the same type.
(Set of Two)
ITEM 392
EMCO Model 3160-10 Standard Horn Antenna. 26.5GHz – 40GHz. 10Watt continuous i/p power.
The EMCO model 3160-10 is a medium gain horn antenna designed for use in
Immunity & shielding testing within the frequency range 26.5-40GHz. They
are linearly polarised, with medium gain, half power beamwidth (equal in both
horizontal and vertical planes) and a nominal VSWR over the recommended
operating frequency range. They can be used easily with a fixed antenna factor
over the range of nominally 43.5dBs and with a gain of 17.0dBi. Both input to
output are well matched to 50 : & 377 : respectively. Comparison of
measured to computed gain & AF are generally well within half a dB and
therefore can be considered as a standard for measurements within their
operating bandwidth. The 27 degree beamwidth in both polarisation planes is
ideally suited to illuminate larger EUTs. These antennae have a detachable
coax-to-waveguide feed, but come fitted ready to use with a “K”(f) connector.
Mounting is with ¼ UNC receptacle on two brackets at 90 degrees. . Power
handling in its present configuration is limited to 10 Watts by the waveguide to K adaptor. If the end user
can couple direct via the waveguide then the horn can accept up to 10,000 Watts. Specifications:
Electrical
Frequency Range:
AF dB(1/m)
VSWR W/feed:
Max Cont Power W:
Connector Type:
26.5GHz-40GHz
43.5
1.3
10Watts (100v/m) @ 1 metre
K(f)
Mechanical
Height:
Width:
Depth:
Weight:
2.15cm
2.76cm
8.69cm
60gm
ITEM 392A
EMCO Model 3160-10 Standard Horn Antenna. 26.5GHz – 40GHz.
The same individual specification as for item 392 but customer
receives two 3160-10s. Typical application here would be for
shielding effectiveness where a transmit & receive antenna are
used preferably of the same type.
(Set of Two)
ITEM 394
PEF-25 Electrostatic Field Probe (RF Leakage Sniffer)
An uncalibrated hand-held probe used as a diagnostic tool to locate RF (“E” field) leakage. This device is
usually deployed in locating RF leakage from either a Faraday chamber or some other RF sealed container.
The field strength is usually measured by either a receiver or spectrum analyser and the field strength
observed is due to both the proximity of the device to the leak and of course the amount of leakage. It has
its magnetic counterpart in the “low frequency magnetic” division within this Section, items 315-316.
Specifications:
Frequency Range:
Impedance:
Output connector:
Weight:
Length:
Diameter:
10kHz-1GHz
50ohms nominal
BNC (f) or “N”.
0.22kg
280mm
32mm
ITEM 396
3121-B4 Shielding Test Dipoles. 400MHz-1GHz
This group comprises two modified B4 baluns
working from 400MHz to 1GHz. The maximum
input power is 50 Watts. They can be used to test
shelters & cabinets for shielding effectiveness
where the standard Log Periodic is too large or
unpractical. The shorter Balun is 25cm long whilst
the standard B4 Balun is 35cm long. The connection
interface is “N” (m) on both units. (“N” back-toback adaptors are supplied in the box). There is no
dedicated calibration carried out on these two units
as they are used in a relative testing environment
only.
ITEM 397
Schwarzbeck SBA-9113 miniature biconical antenna. 0.5GHz-3GHz
A linear polarized microwave broadband
antenna. The biconical elements are mounted on
the usual 22mm diameter tubular balun
terminated with a female “N” connector. Length
from tip to tip of the bicon elements is 140mm &
with a cage diameter of just 49mm. Overall balun
length is 56cm. Weight complete is 750gm.
Balun symmetry less than 0.2dB. Isotropic gain
typically –1.5 to +1.5dBi. Antenna factor ranges
from 25—41dB/m. Designed for microwave
investigation work. Can be fed with a maximum
of 20 Watts input power.
Note: Antenna Factor Chart can be viewed as
part of item 397A (Double set of the above)
ITEM 397A
Schwarzbeck SBA-9113 miniature biconical antenna. 0.5GHz-3GHz
Set of Two of the above Antennas.
ITEM 399
Schwarzbeck SBA-9112 miniature biconical antenna 3GHz - 18GHz
A linear polarized microwave broadband antenna. The biconical elements are mounted on the usual 22mm
diameter tubular balun terminated with a female precision “N” connector. Length from tip to tip of the
bicon elements is 140mm & with a cage diameter of just 49mm. Overall balun length is 56cm. Weight
complete is 750gm. Balun symmetry less than 0.2dB. Isotropic gain typically –1.5 to +1.5dBi. Antenna
factor ranges from 43—53dB/m. Designed for microwave investigation work. Can be fed with a maximum
of 10 Watts input power. A typical application of the SBA 9112 would be as a highly linear broadband
nearfield probe by virtue of its small size. The handbook gives extensive detail as to the field pattern as the
frequency rises.
The device has been used extensively within anechoic chambers on work to do with the mobile phone field
pattern characterization.
Balun length: 560mm. Max input Power: 10Watt. Antenna Factor: 43-53dB/m from 4GHz onward.
Element Dia: 9mm. Cone to Cone length: 20mm. Cross polarization rejection: >-20dB.
END OF SECTION 300