20 Watt Solid State X-Band Power Amplifier.
Abstract
The original objective of this program was to develop a solid state amplifier capable of delivering 20 watts of power in the 7.9 to 8.4 GHz band with 14 dB gain and a 20 dB dynamic range per USA SATCOMA Technical Guidelines, SCA-2161. This included development of four and eight diode circular cavity combiners, development of a hybrid-coupled driver amplifier, design of a dc power supply, packaging and electrical and environmental testing of the final version of the amplifier. Two amplifiers were to be delivered at the end of the program. During the course of the program, the objectives were changed to build one amplifier with a nominal saturated output power of 10 watts but optimized for use at much lower power levels as a linear TWT driver. The specified maximum operating power level was changed to 1.5 watts over the 7.9 to 8.4 GHz band with 38 to 40 dB gain and a 20 dB dynamic range. AN intermodulation product specification of 30 DBc at 200 mW output was added. The number of stages was increased to eight including two four-diode cavity combiners and two hybrid-coupled pairs of stages. Results of the amplifier development work are discussed including RF and dc circuitry and thermal design.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1976
- Accession Number
- ADA047503
Entities
People
- W. Lockyear
Organizations
- Hughes Aircraft Company