A 2 Watt GaAs TX/RX Module with Integral Control Circuitry, for S-Band Phased Array Radars

This paper describes measured results for a TX/RX module operating in S-band over a 20% bandwidth. The module contains 8 GaAs devices, 5 of which are MMICS . The module has an integral thick film hybrid control circuit containing custom silicon ICs. Transmit powers of 2.0 watts are reported together with receive gains of >=20 dB and noise figures of <=4.0 dB. The module has very accurate 4-bit phase shifting in both TX and RX modes.