Title :
50 W class multi-port amplifier for multi-beam satellite communications
Author_Institution :
NTT Radio Commun. Syst. Lab., Kanagawa, Japan
Abstract :
The design of a multiport amplifier (MPA) composed of an array of high-power amplifiers (HPAs), a power divider, and a power combiner and suitable for onboard transponder application in a multibeam mobile satellite communications system is reported. Allowable gain and phase deviations for the multiple HPAs have been clarified by an analytical design method that takes account of a nonuniformity of HPA characteristics. A 2.5-GHz-band, 50-W-class experimental MPA composed of eight HPAs, whose gain deviation was within +or-0.3 dB and whose phase deviation was within +or-8 degrees , is presented. The MPA exhibits excellent performance.<>
Keywords :
microwave amplifiers; mobile communication systems; multiport networks; power amplifiers; satellite relay systems; solid-state microwave circuits; ultra-high-frequency amplifiers; 2.5 GHz; 50 W; UHF; design method; high-power amplifiers; multi-beam satellite communications; multi-port amplifier; multibeam mobile satellite communications system; multiport amplifier; onboard transponder application; power combiner; power divider; Degradation; Design methodology; High power amplifiers; Interference; Microstrip; Power combiners; Power dividers; Power generation; Satellite communication; Transponders;
Conference_Titel :
Microwave Symposium Digest, 1989., IEEE MTT-S International
Conference_Location :
Long Beach, CA, USA
DOI :
10.1109/MWSYM.1989.38961
