Ku-band 지구국 중계기를 위한 12W SSPA에 관한 연구

This paper presents the development of a SSPA operating at Ku-band(14-14.5GHz) in order to replace TWTA used in the terrestrial transponder of a satellite communication. The driving stage of SSPA　uses internally matched 2W, 4W, 8W FET and the power stage is coupled wite two internally matched 8W FET by branch-line combiner. The SSPA is fabricated with both the RF circui and the bias circuitry operating temperature compensation, regulation and sequence on a aluminum housing. The SSPA testing results implemented in this way show 24.8±1dB small-signal gain, 41dBm P1dB power, a typical two tone C/IM3, -33dBc with single carrier backed off 6dB from P1dB, and gain stability over temperature(-30~50) ±1dB.