Varactor tuning apparatus for a strip transmission line device
AssigneeRCA Corporation
InventorWalter Richard Curtice
Life of this patent
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Abstract
A varactor tuning apparatus for tuning a strip transmission line radio frequency device, wherein the device having predetermined operating characteristics includes an active element such as an avalanche diode and a resonant conductive strip section. The tuning apparatus comprises a separate varactor circuit having a varactor mounted on a dielectric substrate including a resonant conductive strip. The varactor circuit is RF coupled to the strip transmission line of the device to provide for tuning the device by varying the reactance of the strip transmission line by electrically changing the capacitance of the varactor.
Claims17
In a negative-resistance radio frequency device of the type wherein an active solid-state element is included in a strip transmission line, said strip transmission line having a resonant conductive strip section, said device having predetermined operating characteristics wherein the improvement comprises a separate varactor circuit for tuning said device, said varactor circuit including means to indirectly couple said varactor circuit to said strip transmission line, and a varactor mounted on a dielectric substrate, said dielectric substrate having a ground plane and a resonant conductive strip, means, including said indirectly coupled means, for RF coupling said varactor circuit to said strip transmission line of said device, and means for tuning said device by electrically varying the capacitance of said varactor and varying thereby the reactance of said strip transmission line of said device.
Dependencies are inferred from the claim text.