Developemet of C-Band High Integration & High Efficiency Space-Borne T/R Module

As the hardcore of phased array antennas, the development of highly reliable TIR module for satellite SAR application becomes the research sticking point. Due to satellite In SAR application, the TIR module is required for high - efficiency, low-loss, low-mass, high amplitude and phase stability and high reliability. In this paper, a C-band Dual-channels T/R Module based on GaN high power MMIC and GaAs high-integrated multifunctional MMIC with multichip module (MCM) packing technics is introduced, which realizes the integration of microwave signal amplification, TIR control, digital amplitude and phase control, high voltage modulation. Compared with GaAs technics, the power amplifier based on GaN MMIC has higher output power and higher power added efficiency, accordingly decreases the total heat loss consumedly of SAR system. The T/R module channel provides over 41.5dBm output power, 29dB receive gain and 2.8dB noise figure, over 37% power added efficiency, weight only 35g, the size is 64mm×39.6mm×7mm, with high-efficiency and low-loss, miniaturization and low-mass, high reliability.