Dual-gate GaAs FET switches

A set of multi-pole, multi-throw switch devices consisting of dual-gate GaAs FET's is described. Included are single-pole, single-throw (SPST), double-pole, double-throw (DPDT), and single-pole four-throw (SP4T) switches. Device fabrication and measurement techniques are discussed. The device models for these switches were derived based on an equivalent circuit of a duff-gate FET. The devices were found to have substantial gain in X-band and low Ku-band.