CA-SAC004 AUBURN GARFIELD 583

FEDERAL COMMUNICATIONS COMMISSION (FCC)
COMPLIANCE STUDY ON
TELECOMMUNICATION FACILITY
Prepared for:
Site No.: CA-SAC004
AUBURN GARFIELD
5831 ROSEBUD LANE
SACRAMENTO, CA
95841
MAY 18/07, REV. 0
CA-SAC004 Auburn Garfield
May 18, 2007, Rev. 0
Page 1
SITE DESCRIPTION:
Carrier:
Site Address:
Type of Service:
Sectors:
Antenna Type:
Number of Antennas:
Frequencies (GHz):
Maximum Power:
Antenna Height:
Clearwire wireless broadband
5831 Rosebud Lane, Sacramento, CA 95841
MMDS (Multichannel Multipoint Distribution Service)
0°, 120°, 240°
Kathrein 840 10058
3
2.5 – 2.7 (directional)
40 W ERP (per sector)
120’± (Radiation center AGL)
Table 1. Clearwire RF summary
There are multiple telecommunication facilities co-locating with various types of antennas on an
existing 320’ guy tower at the above address. Clearwire is proposing to install three directional
antennas on the tower at 120’ above ground level. Each antenna will have a horizontal beam width
of 87°. One equipment cabinet will be installed inside one of the equipment rooms in an adjacent
building beside the tower. Access to the compound and the antennas is restricted to authorized
personnel.
Figure 1. Facility and surrounding area
CA-SAC004 Auburn Garfield
May 18, 2007, Rev. 0
Page 2
Clearwire also proposes to install 3 point-to-point microwave antennas below the directional
antennas. The RF power outside the main beam of these microwave antennas is negligible, and the
RF exposure contribution at ground level from the microwave dishes is insignificant.
The RF summary for the existing broadcast, paging, mobile radio, and wireless communications
facilities on the tower is summarized in Table 2.
Carrier:
Service:
Elevations:
KSSJ
FM 94.7 MHz
318’
XM
satellite radio 2.34 GHz
250’
Sirius
satellite radio
235’
Metrocall
Paging 930 MHz
230’
Arch
Paging 930 MHz
230’
American Mobile
Mobile radio 450 MHz
210’
American Med. Response
Mobile radio 150 MHz
180’
US Customs
Mobile radio 450 MHz
180’
Weblink Wireless
Paging 930 MHz
180’
Nextel Communications
ESMR 850 MHz
170’
MetroPCS
CDMA 1900 MHz
140’
Verizon Wireless
CDMA, EVDO 850, 1900 MHz
110’
Nextel Sprint
CDMA 1900 MHz
100’
SureWest
CDMA 1900 MHz
90’
Table 2. Existing communications facilities RF summary
Max. ERP
25 kW
1 kW
1 kW
0.5 kW
0.5 kW
0.5 kW
0.5 kW
0.5 kW
0.5 kW
0.5 kW
0.5 kW
0.5 / 0.5 kW
0.5 kW
0.5 kW
PROTOCOL:
This study, and the calculations performed therein, is based on OET Bulletin 651 which adopts
ANSI C95.1-1992 and NCRP standards. In particular, equation 10 from section 2 of the guideline
is used as a model (in conjunction with known antenna radiation patterns) for calculating the
power density at different points of interest. This information will be used to judge the RF
exposure level incident upon the general population, and any employee present in the area. It
should be noted that ground reflection of RF waves has been taken into account.
ENVIRONMENTAL EVALUATION:
According to Table 2 in Appendix A of Bulletin 65, an MDS facility is subject to routine
environmental evaluation if the height above ground level to the lowest point on a non-building
mounted antenna is less than 10 m, and the total power of all channels in a given sector is in
excess of 1000 W ERP. The height above ground level to the lowest point of the antenna in
question is 118’± (36 m); therefore, this facility is exempt from routine environmental evaluation.
FCC’S MAXIMUM PERMISSIBLE EXPOSURE (MPE) LIMIT:
In order to evaluate the RF exposure level, the power densities at different locations of interest
have been examined. Equation 10 from Bulletin 65 is reproduced here as equation 1:
1
Cleveland, Robert F, et al. Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency
Electromagnetic Fields. OET Bulletin 65, Edition 97-01, August 1997.
CA-SAC004 Auburn Garfield
May 18, 2007, Rev. 0
Page 3
S=
Where:
S=
ERP =
R=
F=
33.4 F 2 ERP
R2
(1)
Power density [µW/cm2]
Effective radiated power [W]
Distance [m]
Relative field factor (relative numeric gain)
Scenario 1: Near the compound
The RF exposure level of a six-foot tall person standing close to the facility is evaluated. For the
worst-case scenario, we assume that the person is standing on the rooftop of the adjacent building,
and the antennas of all carriers are transmitting the maximum number of channels at the same
time, with each channel at its maximum power level. In addition, the azimuths of all directional
antennas are assumed to be similar. Please refer to appendix A for the calculations. The
maximum cumulative power densities for a location close to the facility are summarized in Table
3.
F2
R (m) S (µW/cm²) (from eq. 1)
-15(0.03)
31.71
0.0425
-20(0.01)
92.07
0.9850
-20(0.01)
71.34
0.0656
-20(0.01)
66.77
0.0749
-20(0.01)
65.24
0.0392
-15(0.03)
65.24
0.1256
-20(0.01)
50.00
0.0668
-20(0.01)
50.00
0.0668
-20(0.01)
50.00
0.0668
-20(0.01)
50.00
0.0668
-18(0.016)
46.95
0.1212
-20(0.01)
37.80
0.1169
-20(0.01)
28.66
0.2033
-20(0.01)
28.66
0.2033
-20(0.01)
25.61
0.2546
-20(0.01)
22.56
0.3281
Total
Table 3. Worst-case predicted power density values near facility.
Service
clearwire
KSSJ
XM
Sirius
Metrocall
Arch
A. Mobile
A.M.R.
US Customs
Weblink Wireless
Nextel
MetroPCS
Verizon 850 MHz
Verizon 1900 MHz
Sprint
SureWest
Max. ERP
40 W
25000 W
1000 W
1000 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
MPE %
0.0043
0.4925
0.0066
0.0075
0.0063
0.0203
0.0223
0.0334
0.0223
0.0108
0.0209
0.0117
0.0351
0.0203
0.0255
0.0328
0.7726
The Maximum Permissible Exposure (MPE) limit is 1000 µW/cm² for 1900 MHz and 2500 MHz
facilities, 625 µW/cm² for 937 MHz facilities, 580 µW/cm² for 860 MHz facilities, 300 µW/cm²
for 450 MHz facilities, and 200 µW/cm² for 150 MHz facilities2. The maximum cumulative power
density for the proposed clearwire antennas and the existing antennas is calculated to be 0.77% of
the MPE limit.
2
Ibid., page 67.
CA-SAC004 Auburn Garfield
May 18, 2007, Rev. 0
Page 4
Scenario 2: Nearest Residential Building
The compound is located in an industrial/commercial area. There are also low density residential
buildings on the west side of the compound. The RF exposure level on the nearest residential
building rooftop is evaluated. Please refer to scenario 2 in appendix A for the analysis. We
assume again, all antennas within a sector are transmitting with maximum power level and the
antennas of each carrier have similar azimuths. In addition, we assume the building is within the
antenna beam paths. The maximum cumulative power density for the proposed clearwire antennas
and the existing antennas is calculated to be 1.17% of the MPE limit, as shown in Table 4.
Service
clearwire
KSSJ
XM
Sirius
Metrocall
Arch
A. Mobile
A.M.R.
US Customs
Weblink Wireless
Nextel
MetroPCS
Verizon 850 MHz
Verizon 1900 MHz
Sprint
SureWest
Max. ERP
40 W
25000 W
1000 W
1000 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
500 W
F2
R (m)
S (µW/cm²) (from eq. 1)
0(1)
194.67
0.0353
-10(0.1)
213.00
1.8405
-10(0.1)
204.89
0.0796
-10(0.1)
203.35
0.0808
-10(0.1)
202.85
0.0406
-13(0.05) 202.85
0.0203
-10(0.1)
198.48
0.0424
-3(0.5)
198.48
0.2124
-10(0.1)
198.48
0.0424
-10(0.1)
198.48
0.0424
-10(0.1)
197.73
0.0427
-15(0.03) 195.76
0.0139
-5(0.3)
194.20
0.1339
-5(0.3)
194.20
0.1339
-5(0.3)
193.77
0.1405
-5(0.3)
193.39
0.1411
Total
Table 4. Worst-case predicted power density values for scenario 2.
MPE %
0.0035
0.9203
0.0080
0.0081
0.0065
0.0033
0.0141
0.1062
0.0141
0.0068
0.0074
0.0014
0.0241
0.0140
0.0141
0.0141
1.1660
As indicated in both scenarios, the power density contribution from clearwire is less than 1% of
the cumulative total of all carriers. There is a relatively low level of RF energy directed either
above or below the horizontal plane of the antennas, and there are no locations in the surrounding
areas near the compound that will have RF exposure levels close to the MPE limit.
Conclusion:
Under “worst-case” conditions, the calculations shown above predict that the maximum possible
RF exposure will not exceed 1.17% of the MPE limit. There will be less RF exposure on the
ground level or on nearby buildings as a person moves away from the site. Therefore, the
proposed Clearwire antennas will comply with the general population/uncontrolled limit.
APPENDIX A
SCENARIO 1 NEAR FACILITY
Angle = 90 degrees Building Height = 10 feet
Carrier
Person = 6 feet
Height (feet) Distance (feet) R (feet)
clearwire
KSSJ
XM
Sirius
Metrocall 930
Arch
A. Mobile
A. Med. Response
US Customs
Weblink
Nextel
MetroPCS
Verizon 850
Verizon 1900
Sprint
SureWest
104
302
234
219
214
214
164
164
164
164
154
124
94
94
84
74
Carrier
F^2 (dB)
clearwire
KSSJ
XM
Sirius
Metrocall 930
Arch
A. Mobile
A. Med. Response
US Customs
Weblink
Nextel
MetroPCS
Verizon 850
Verizon 1900
Sprint
SureWest
-15
-20
-20
-20
-20
-15
-20
-20
-20
-20
-18
-20
-20
-20
-20
-20
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0.032
0.01
0.01
0.01
0.01
0.032
0.01
0.01
0.01
0.01
0.016
0.01
0.01
0.01
0.01
0.01
R (meters)
Angle (degrees)
104
302
234
219
214
214
164
164
164
164
154
124
94
94
84
74
31.71
92.07
71.34
66.77
65.24
65.24
50
50
50
50
46.95
37.8
28.66
28.66
25.61
22.56
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
90
Max. ERP
S
MPE (%)
40
25000
1000
1000
500
500
500
500
500
500
500
500
500
500
500
500
0.0425
0.985
0.0656
0.0749
0.0392
0.1256
0.0668
0.0668
0.0668
0.0668
0.1212
0.1169
0.2033
0.2033
0.2546
0.3281
0.0043
0.4925
0.0066
0.0075
0.0063
0.0203
0.0223
0.0334
0.0223
0.0108
0.0209
0.0117
0.0351
0.0203
0.0255
0.0328
S total
0.7726
SCENARIO 2 NEAREST RESIDENTIAL BUILDING
Distance = 630 feet Building Height = 10 feet
Carrier
Person = 6 feet
Height (feet) Distance (feet) R (feet)
clearwire
KSSJ
XM
Sirius
Metrocall 930
Arch
A. Mobile
A. Med. Response
US Customs
Weblink
Nextel
MetroPCS
Verizon 850
Verizon 1900
Sprint
SureWest
104
302
234
219
214
214
164
164
164
164
154
124
94
94
84
74
Carrier
F^2 (dB)
clearwire
KSSJ
XM
Sirius
Metrocall 930
Arch
A. Mobile
A. Med. Response
US Customs
Weblink
Nextel
MetroPCS
Verizon 850
Verizon 1900
Sprint
SureWest
0
-10
-10
-10
-10
-13
-10
-3
-10
-10
-10
-15
-5
-5
-5
-5
630
630
630
630
630
630
630
630
630
630
630
630
630
630
630
630
1
0.1
0.1
0.1
0.1
0.05
0.1
0.501
0.1
0.1
0.1
0.032
0.316
0.316
0.316
0.316
R (meters)
Angle (degrees)
638.53
698.64
672.05
666.98
665.35
665.35
651
651
651
651
648.55
642.09
636.97
636.97
635.58
634.33
194.67
213
204.89
203.35
202.85
202.85
198.48
198.48
198.48
198.48
197.73
195.76
194.2
194.2
193.77
193.39
9.37
25.61
20.38
19.17
18.76
18.76
14.59
14.59
14.59
14.59
13.74
11.13
8.49
8.49
7.59
6.7
Max. ERP
S
MPE (%)
40
25000
1000
1000
500
500
500
500
500
500
500
500
500
500
500
500
0.0353
1.8405
0.0796
0.0808
0.0406
0.0203
0.0424
0.2124
0.0424
0.0424
0.0427
0.0139
0.1399
0.1399
0.1405
0.1411
0.0035
0.9203
0.008
0.0081
0.0065
0.0033
0.0141
0.1062
0.0141
0.0068
0.0074
0.0014
0.0241
0.014
0.0141
0.0141
S total
1.166
840 10057
840 10058
87° Panel Antenna
2496–2690 MHz
Kathrein Scala’s X-polarized adjustable electrical downtilt antennas
offer the carrier the ability to tailor sites for optimum performance.
Using variable downtilt, only a few models need be procured to
accommodate the needs of widely varying conditions. Remotely
controlled downtilt is available as a retrofitable option.
• 0-10° electrical downtilt range.
10
10
60
20
0n
0n
21
n
30
0n
90n
12
0n
0n
24
90n
0n
0n
21
0n
30
n
33
0n
10
n
30
0n
3
60
20
30
n
30
90n
12
0n
0n
24
90n
12
0n
0n
24
180n
0n
15
0n
15
H-plane
Horizontal pattern
±45°- polarization
10° electrical downtilt
270n
21
0n
270n
0n
0n
10
60
20
21
0n
0n
180n
E-plane
Vertical pattern
±45°- polarization
5° electrical downtilt
0n
180n
15
0n
12
0n
24
15
21
270n
H-plane
Horizontal pattern
±45°- polarization
5° electrical downtilt
0n
n
30
270n
30
60
20
30
3
3
10
60
20
180n
0n
n
30
n
0n
0n
180n
0n
33
10
30
15
0n
0n
E-plane
Vertical pattern
±45°- polarization
0° electrical downtilt
0n
3
12
0n
24
0n
21
90n
15
180n
n
270n
H-plane
Horizontal pattern
±45°- polarization
0° electrical downtilt
33
N or 7/16 DIN female
0° 4° 8° 10°
15 15 15 15 dB (typical)
> -1 dBi to 12° below horizon (typical)
(17 dB below 16 dBi main beam)
Weight 10 lb (4.5 kg)
Dimensions 42 x 6.1 x 2.7 inches
(1067 x 155 x 69 mm)
Equivalent flat plate area 2.5 ft2 (0.23 m2)
Wind survival rating*
120 mph (200 kph)
Shipping dimensions 48 x 6.8 x 3.6 inches
(1220 x 172 x 92 mm)
Shipping weight
13.6 lb (6.2 kg)
Mounting Fixed and tilt-mount options are
available for 2 to 5.7 inch
(50 to 145 mm) OD masts.
See reverse for order information.
*Mechanical design is based on environmental conditions as stipulated in
EIA-222-F (June 1996) and/or ETS 300 019-1-4 which include the static
mechanical load imposed on an antenna by wind at maximum velocity.
See the Engineering Section of the catalog for further details.
12
0n
24
0n
2496–2690 MHz
16 dBi
50 ohms
< 1.5:1
IM3:< -150 dBc
+45° and -45°
>23 dB typical
300 watts (at 50°C)
87 degrees at midband (half power)
7 degrees at midband (half power)
0–10 degrees
60
20
30
90n
33
Frequency range Gain
Impedance VSWR Intermodulation (2x20w)
Polarization Front-to-back ratio Maximum input power H-plane beamwidth E-plane beamwidth Electrical downtilt
continously adjustable
Connector
Sidelobe suppression for
first sidelobe above horizon
Null fill
0n
30
270n
Specifications:
30
30
• Optional remote downtilt control.
n
n
0n
3
30
30
0n
n
30
n
0n
3
30
0n
33
0n
• No moving electrical connections.
33
• DC Grounded metallic parts for impulse suppression.
E-plane
Vertical pattern
±45°- polarization
10° electrical downtilt
10952-A
Kathrein Inc., Scala Division Post Office Box 4580 Medford, OR 97501 (USA) Phone: (541) 779-6500
Email: [email protected] Internet: www.kathrein-scala.com
Fax: (541) 779-3991