Abstract
Design and test results for small-signal multifunction MMICs (monolithic microwave integrated circuits) for C-band transmit/receive (T/R) modules are presented. This chip set includes the entire receive path and a portion of the transmit path (seven stages of amplification and 11 passive circuits) in just four chips. These ICs, fabricated with the multifunction 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 2.5 dB noise figure, the phase shifter SPDT (single-pole double-throw) switch has 8+or-1 dB loss, the T/R buffer amplifier has 6.5+or-0.2 gain and 3.5 dB noise figure, and the variable gain buffer amplifier has 8.5+or-0.5 dB gain and 2.5 dB noise figure. >
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