GaAs FET Applications for Injection-Locked Oscillators and Self-Oscillating Mixers

Injection-locked oscillators (ILO´s) using GaAs FET´s are described experimentally and theoretically, showing that a wider locking range can be obtained with transmission-type ILO´s than with reffection-type, assuming Q_ext, to the load to be the same in each case. Frequency-stabilized FET oscillators are discused in terms of the advantages gained by terminating the gate port by a 50-Omega load. Functioning as a self-oscillating mixer, the circuit showed a 9.5-dB (DSB) noise figure.