US Singles 2 (Page 1)

TRAK Microwave
Loads And Terminations
Conduction Cooled Load
with Thermal Switch, 10 W Avg.
Convection Cooled Load,
200 KW Peak, 10 W Avg.
Introduction
TNC Load,
90 W CW
TRAK Microwave supplies an extensive range of waveguide and coaxial high
reliability load and termination products for military, space and commercial
applications. For over 20 years, TRAK’s termination products were exclusively used
in the design of TRAK’s ferrite isolators and passive microwave combiners.
Today, TRAK specializes in unique solutions and full design services of load and
terminations directly to customers. TRAK’s load and terminations offer optimized
performance using only the most reliable design and assembly techniques
available. These products are qualified to operate in the most rigorous
environments including deep space probes, linear accelerators, strategic radars
and medical body scanners.
Capabilities
TRAK has an extensive array of capabilities required to design and manufacture
loads and terminations.
3-D Modeling/ Finite Element Analysis
Convection Cooled Termination,
20 W Avg.
Static Stress
Dynamic/Modal
High Power RF Testing: High power sources are available from 1 to 18 GHz.
Several examples are listed below:
950 to 2300 MHz, 150W CW
2900 to 3100 MHz, 700kW Peak, 700W average
8500 to 9600 MHz, 150kW Peak, 150W average
8000 to 18000 MHz, 400W average
Thin Film Load,
90 W CW
8000 to 20000 MHz, 20W CW
TVAC facilities test down to 1e-5 Torr (–55 to +125 C)
EMC Radiated Emissions from 1 GHz to 30 GHz
Water Testing
Pressure to 20 Bar Gauge
Water Chilling (+4 to +60 C)
Coaxial Load,
10 W Avg.
Wedge Load,
60 W CW
Coaxial Load,
2 W Avg.
Finned Load,
150 W Avg.
Space Applications
For space applications, paramount importance is placed on the reliability of the
components and sub-assemblies that together form the payload systems. This
also is true for the high power RF systems where redundancy networks are not
always possible. TRAK high power terminations are used on high power RF
source or combiner networks, for example, SSPA output stages, TWTA and OMUX
applications, where features such as mass and performance are equally necessary.
WR340 Load
100 W Avg.
TRAK can provide an up-to-date program heritage list and operating parameters on a
wide range of load types and operating frequencies.
Military Applications
The majority of the terminations supplied by TRAK into military systems are for radar
applications. Terminations are designed to handle fault, as in the load on an isolator,
or planned incident power conditions, as in a dummy transmit load. The
combinations of high incident power and typical military operating environments
result in designs that are required to operate reliably under extreme conditions for
extended periods of time under worst-case conditions.
WR75 Thin Film Load
A wide range of cooling options are available including conduction, convection and
water-cooling features, which are designed based on system limitations and customer
preferences to ensure reliable operation.
TRAK’s proprietary thin film load technique is used extensively in military applications
where the lower mass and cooler operating temperatures are key benefits.
Commercial Applications
TRAK supplies terminations for civilian ATC, medical oncology and industrial
processing. These markets require the same qualities in their products as the space
and military markets and consequently, TRAK is well positioned to supply the types of
product required.
Water Cooled Load,
1000 W Avg.
Convection Cooled Thin Film Load,
60 W Avg.
Coaxial Load,
2 W Avg.
Waveguide Design
When defining high power components, TRAK closely works with
its customers to fully characterize the design parameters, while
giving equal consideration to electrical performance, mechanical
and environmental constraints. Often compromises have to be
made. These are evaluated, weighted and reviewed with the
customer to arrive at the optimal design solution.
Conduction, Convection and Liquid Cooled
WG Loads
Once operating parameters are established in concert with the
customer’s design team and policies, TRAK executes the design
such that each termination operates at the lowest possible
temperature within its physical and mounting limitations.
To arrive at optimal solutions, TRAK makes extensive use of FEA
and 3-D modeling tools to ensure mechanical and thermal integrity
while under transient and steady state loading conditions.
Waveguide Technology
High Power terminations are produced using a number of complementary techniques and processes. Some of these
techniques are standard to the industry, but several are proprietary to TRAK. Choice of technique is governed by customer
specification and physical size parameters. When possible, TRAK prefers it’s space qualified proprietary process that offers the
designer a host of distinct advantages.
Wedge versus Thin Film
Carborundum wedge loads are used where the appropriate length of the termination precludes using thin film. Most low
power loads are fabricated using wedges that are epoxied into place. Design of the wedge is dependent on the
frequency, operating power and desired electrical performance
TRAK’s proprietary low mass load technology has demonstrated its ability to operate under the harshest space and military environments. The technology allows combinations of high continuous power at elevated operating temperatures to function with
the utmost reliability, while also offering several added benefits. Where design constraints allow, waveguide terminations are
fabricated adding minimal mass to the basic waveguide structure. TRAK uses a conformal RF load process to coat the
internal waveguide structure. Successive coats are added to conform to the internal structure, thus building up a very thin layer
of RF absorbent material. These coatings are then baked at very high temperatures to form a conformal load that is both low
mass and space qualified.
Thin film loads have key distinct advantages over wedge techniques:
- Approximately 50% lower then traditional wedge designs
Mass
Epoxy Free - Increased reliability and reduced outgassing
Precise Coating - Precise temperature gradient modeling
Faster Thermal Time Constant – Temperature monitoring indicating
absorbed power
RF Probes – Easy intergartion for instantaneous signal monitoring
Structures - Compact and complex fabricated shapes
Duplexer 100 KW Peak, 2 KW Avg.
Water Cooled Load
Coaxial Design
TRAK uses proprietary and third party software to ensure that the
thermal and mechanical designs are optimized and fully capable of
providing operation under the most extreme circumstances. TRAK
makes extensive use of 3D mechanical modeling and finite
element analysis to ensure optimum solutions. In addition,
drawings can be accepted and interchanged with customers so
that the design process is robust and timely. To ensure best design
practices, a checklist of questions and guidance on the options
and trade-offs is provided to all customers.
TRAK loads are all designed with safety and reliability in mind.
Whether the application is intended to be in a satellite, military
or medical enviornment, TRAK products will always meet or
exceed your expectations.
Forced Air Cooled Redundancy Switch and
Load, 10 KW Avg.
Coaxial Technology
TRAK has a broad line of coaxial packaged loads for space and
military applications. These products are designed to meet EMC,
RF, and mechanical requirements. TRAK designs these loads around
commercially available proprietary chip terminations. The termination is modeled within a suitable housing constructed to meet the
mounting, environmental and cooling requirements of the host
system. The housings are generally made from High Conductivity
Oxygen Free Copper (HCOFC), which offers the most efficient
transfer of heat from the chip to the cooling structure.
Finished loads are nickel or silver-plated.
Duplexer 300 KW Peak, 6-5 KW Avg.
Water Cooled Load, 2 KW Avg.
Other examples of coaxial loads can be seen in TRAK’s broad range
of high power coaxial isolators. These loads are designed as part
of the isolator housing, however the techniques may be readily
integrated to offer compact robust stand-alone solutions for
coaxial terminations. TRAK has supplied approximately
4000 high power terminations for space applications.
A full heritage program list is available upon request.
Additional technical information is available from TRAK on load and termination designs and technology.
TRAK ia a unique solutions company while
providing full design service for the supply of
high reliability products.
TRAK Microwave, an ISO 9001 & AS9100 registered company,
designs and manufactures a diverse range of high reliability RF
and microwave integrated assemblies, subsystems,
components and time & frequency systems for defense, space
and commercial applications worldwide.
For more information on TRAK Microwave,
visit our web site at www.trak.com.
Duplexer 250 KW Peak, 4.5 KW Avg.
Water Cooled Load, 500 W
コーンズ ドッドウェル株式会社
第二営業本部 デバイス営業部
東京:03-5774-9978
大阪:06-6532-1012
URL:http://www.cornes-dodwell.co.jp/
Email:[email protected]