Title :
Development of 20 GHz-band on-board power amplifiers
Author :
Makishima, Hideo ; Mita, Nagahisa
Author_Institution :
NTT Radio Commun. Syst. Lab., Kanagawa, Japan
Abstract :
A high-efficiency and lightweight solid-state power amplifier (SSPA) and traveling-wave-tube amplifier (TWTA) for use in a 20-GHz-band satellite transponder have been developed. The SSPA features a compact, highly efficient output power combiner. The output power of the SSPA is 3.3 W with an efficiency of 21% at 18.365 GHz, and it weighs 750 g. The TWTA features a high-efficiency, compact size three-stage collector and high switching frequency power supply. The TWTA delivers an output power of 12 W with 31% efficiency at 20.465 GHz and weighs 1430 g.<>
Keywords :
microwave amplifiers; power amplifiers; satellite relay systems; solid-state microwave circuits; transponders; travelling-wave-tubes; 0.75 kg; 1.43 kg; 12 W; 18.365 GHz; 20 GHz; 20.465 GHz; 21 percent; 3.3 W; 31 percent; SHF; TWT amplifier; TWTA; high switching frequency power supply; lightweight design; output power combiner; power amplifier; satellite transponder; solid-state amplifier; three-stage collector; traveling-wave-tube; Circuits; Energy consumption; FETs; Frequency conversion; High power amplifiers; Power amplifiers; Power generation; Power supplies; Satellite broadcasting; Transponders;
Conference_Titel :
Microwave Symposium Digest, 1991., IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-87942-591-1
DOI :
10.1109/MWSYM.1991.147263
