GaAs MMIC Power FET Amplifiers at K-Band

K-band monolithic power GaAs FET amplifier modules have been developed. These single-ended modules provide a linear gain of 4.5 dB and out-put power of 27 dBm in the 17.7- to 20.5-GHz band. At 19 GHz, a balanced module has achieved an output power of up to 1.5 W (0.52 W/mm), while a cascaded multistage amplifier has demonstrated a linear power gain of 26.2 dB and output power of 1.33 W. These 1.7- × 1.8-mm MMICs include DC-blocking capacitors and bias networks.