Semiconductor microwave oscillator

Claim 1

A SEMICONDUCTOR STRIPLINE OSCILLATOR CIRCUIT OPERABLE AT MICROWAVE FREQUENCIES COMPRISING AT LEAST A PAIR OF SPACED STRIPLINE CONDUCTORS, SAID STRIPLINE CONDUCTORS FORMING A LOW PASS FILTER MEANS AT ONE END PORTION OF SAID OSCILLATOR, SAID ONE END PORTION INCLUDING MEANS FOR APPLYING A BIAS VOLTAGE TO SAID ONE END PORTION OF SAID OSCILLATOR CIRCUIT, SAID LOW PASS FILTER MEANS BEING ADAPTED AND ARRANGED TO PASS D.C. WHILE BLOCKING R.F. ENERGY AT F1, WHERE F1 IS THE OSCILLATOR CIRCUIT OPERATING FREQUENCY A SEMICONDUCTOR DIODE DISPOSED WITHIN SAID OSCILLATOR BETWEEN SAID PAIR OF STRIPLINE CONDUCTORS, SAID SEMICONDUCTOR DIODE BEING OF A TYPE WHICH EXHIBITS AN ELECTRON DRIFT VELOCITY V VS. APPLIED ELECTRIC FIELD E DEPENDENCE WHICH CONTAINS A REGION OF BULK NEGATIVE DIFFERENTIAL MOBILITY, SAID DIODE BODY BEING DISPOSED BETWEEN A PAIR OF SOURCE AND DRAIN ELECTRODES, SAID SOURCE AND DRAIN ELECTRODES BEING IN D.C. COUPLING RELATIONSHIP WITH RESPECT TO SAID PAIR OF STRIPLINE CONDUCTORS, SAID SEMICONDUCTOR DIODE BEING DISPOSED IN A SECTION OF STRIPLINE WHICH IS BOUNDED ON THE BIAS SOURCE END BY SAID LOW-PASS FILTER MEANS AND ON THE R.F. OUTPUT END BY A LUMPED SHUNT CAPACITANCE, SAID OSCILLATOR INCLUDING MEANS FOR EXTRACTING R.F. ENERGY FROM SAID STRIPLINE OSCILLATOR.