Title :
A 12.5 GHz-band 50 W solid-state power amplifier for future broadcasting satellites
Author :
Mizuno, Hidenori ; Mitsumoto, H. ; Yazawa, N.
Author_Institution :
NHK, Tokyo, Japan
Abstract :
A 50-W solid-state power amplifier (SSPA) utilizing a cylindrical-cavity-type power combiner with low insertion loss and a corporate-type power divider has been designed and fabricated. The isolation between the input ports of the combiner is studied. The output power of the SSPA is more than 50 W over a bandwidth of 12.625+or-0.125 GHz, and its efficiency is more than 21.6% including electronic power conditions (EPCs) (more than 26% excluding the EPCs). The gain is more than 37 dB. A thermal vacuum test was performed, resulting in satisfactory performance.<>
Keywords :
direct broadcasting by satellite; microwave amplifiers; solid-state microwave circuits; transponders; waveguide components; 0.25 GHz; 12.5 GHz; 21.6 percent; 37 dB; 50 W; SHF; SSPA; bandwidth; broadcasting satellites; corporate-type power divider; cylindrical-cavity-type power combiner; efficiency; electronic power conditions; gain; low insertion loss; output power; solid-state power amplifier; thermal vacuum test; transponders; FETs; Power amplifiers; Power combiners; Power dividers; Power generation; Satellite broadcasting; Solid state circuits; TV broadcasting; Testing; Transponders;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99826
