A 1 Watt 28 GHz Band Amplifier Using Clustered FETs

The clustered FET operating at Ka-band, in which four FET cells with 800 µm gate width are combined by the new 4-way monolithic combiner, has been developed. The amplifier using these clustered FETs has been demonstrated with more than 1 watt power output with 6 dB associated gain over 27.6 - 29.3 GHz.