Millimeter wave oscillator with enhanced dielectric coupler
AssigneeThe United States of America as represented by the Secretary of the Army
InventorsEdmund E. Malecki, Harold Jacobs
Life of this patent
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Abstract
A low cost arrangement for a millimeter wave solid state diode oscillator, hich obviates precise machining and uses a dielectric transmission line associated with a resonant cavity. Coupling and impedance matching are greatly facilitated by a conductive stripe structure on the end of the dielectric transmission line, extending into the resonant cavity of the solid state oscillator. Fine tuning is provided by a mechanical slide screw. Two layers of shielding surrounding the resonant cavity are provided by a convenient package suitable for various applications of the millimeter wave oscillator wherein leakage radiation is not permitted.
Claims12
An oscillator comprising an active device capable of producing wave energy, a resonant cavity-formed around said device and including a waveguide, a dielectric transmission medium extending from a portion of said resonant cavity for delivering wave energy to said waveguide, and means mounted on a surface of said dielectric transmission medium for enhancing the coupling of radio frequency energy from said cavity into said dielectric transmission medium to facilitate power transfer and impedance matching between said resonant cavity and said dielectric transmission medium to increase the output power delivered in a first direction to said waveguide, said means for enhancing the coupling including a plurality of parallel metallic stripes spaced apart on said dielectric medium and electrically insulated from each other and displaced therealong in said first direction.
A source of radio frequency energy comprising a resonant cavity, a biased solid state diode in said resonant cavity, said cavity being formed between a ground plane connected to one terminal of the diode and a resonant disc electrically connected to the other terminal of the diode and physically displaced therefrom, means for extracting power from the resonant cavity including an elongated dielectric transmission medium partially occupying the cavity, said means having a plurality of spaced conductive stripes at one end electrically insulated from one another and mounted transverse to the longitudinal dimensions of the elongated medium, said stripes serving as transformers to match the impedance of the diode and resonant cavity to the dielectric medium thereby enhancing power transfer between said diode and said transmission medium.
Dependencies are inferred from the claim text.