High power variable slide RF tuner
AssigneeRaytheon Company
InventorsThomas L. Obert, Kenneth W. Brown, Thomas A. Drake
Life of this patent
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Abstract
A high power slide tuning capacitor (200) integrated into a circuit board adapted to function at RF and microwave frequencies. The capacitor (200) includes a dielectric substrate (26) with a cavity (28) cut into a side of the substrate (26); a ground plane (24) mounted on a bottom surface of the dielectric substrate (26); a microstrip patch (22) mounted on a top surface of the dielectric substrate (26) and positioned above the cavity (28); and a movable dielectric stub (30) which engages the cavity (28) such that a variable length of the stub (30) is positioned beneath the microstrip patch (22). The microstrip patch (22) can be coupled to a desired circuit trace (20), effectively forming a shunt capacitor to ground.
Claims10
A variable capacitor comprising:
- a dielectric substrate with a cavity disposed therein;
- a first conductive surface mounted on a first side of said cavity;
- a second conductive surface mounted on a second side of said cavity, at least partially diametrically opposed to said first conductive surface;
- and
- a dielectric stub adapted for reciprocal motion within said cavity.
A system for providing a variable capacitance comprising:
- a dielectric substrate with a cavity disposed therein;
- a ground plane mounted on a first side of said cavity;
- a microstrip patch mounted on a second side of said cavity, at least partially diametrically opposed to said ground plane;
- a dielectric stub adapted for reciprocal motion within said cavity;
- an electro-mechanical actuatoroperatively coupled to said stub;
- and
- means for providing a control signal to said electro-mechanical actuator whereby said stub is inserted into said cavity to provide a predetermined amount of capacitance.
Dependencies are inferred from the claim text.