Title :
Operation of solid state-power amplifiers at cryogenic temperatures
Author :
Johnson, J.H. ; D´Anna, P.E.
Author_Institution :
Microwave Modules & Devices Inc., Mountain View, CA, USA
Abstract :
A novel approach is presented for cooling lightweight transistor amplifier modules for high-power operation. The feasibility of fabricating UHF CW (continuous wave) power amplifiers with weight-to-power output ratios of the order of 0.2 gm/W and power output approaching 2 kW (CW) is demonstrated. 1800 W (CW) at 425 MHz was obtained from a four-transistor amplifier that weighed 13 oz. Amplifier design and construction are detailed, and module performance is discussed.<>
Keywords :
cryogenics; microwave amplifiers; power amplifiers; 2 kW; 425 MHz; UHF CW; cryogenic temperatures; four-transistor amplifier; high-power operation; lightweight transistor amplifier modules; power output; solid state-power amplifiers; weight-to-power output ratios; Circuit testing; Cooling; Cryogenics; Fabrication; High power amplifiers; Operational amplifiers; Packaging; Pulse amplifiers; Solids; Temperature;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38858
