Multifunction chip set for T/R module receive path

Design and test results are presented for multifunction MMICs (monolithic microwave integrated circuits) for C-band transmit receive (T/R) modules. This small signal chip set contains the entire receive path (five stages of amplification and ten passive devices) in just three chips. These ICs, fabricated with the multifunctional self-aligned gate. (MSAG) process, demonstrate a high level of integration, excellent performance, and a good yield. The variable-gain low-noise amplifier has 30+or-1-dB gain and a 2.5-dB noise figure, the phase shifter/SPDT switch has 8+or-1-dB loss, and the buffer amplifier has 6.5+or-0.2-dB gain and a 3.5-dB noise figure. The average yield for these circuits was 40% or better.<
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