A dielectric-resonator-stabilized, Gallium-Arsenide-FET, negative resistance oscillator operating in the microwave region incorporating an improved form of dielectric resonator whose resonant frequency is tuned by the addition or removal of metal from the surface of a dielectric tuning plate in the resonator,...http://www.google.es/patents/US4639690?utm_source=gb-gplus-sharePatente US4639690 - Tunable, dielectric-resonator-stabilized oscillator and method of tuning same
Tunable, dielectric-resonator-stabilized oscillator and method of tuning same
