Stabilized circuit of high output power transistor for microwave and milliwave

摘要

An amplifier is comprised of a GaAsFET transistor connected between input matching circuit and output matching circuit for effecting amplification in microwave band and milliwave band. A filter circuit is interposed between the input matching circuit and a gate electrode of the transistor so as to selectively reduce an input impedance at 1/2 frequency of the operation frequency to thereby stabilize the operation of the transistor.