Patent ID: 6801102
Filing Date: 2004-10-05
Classification: H01P,H03F,H03H

Abstract:
A tunable bandwidth filter having a substantially fixed frequency comprising:(a) an input locus for receiving input signals to the filter; said input locus being coupled with at least one conductive member; (b) an output locus for presenting output signals from the filter; said output locus being coupled with said at least one conductive member; (c) a plurality of fixed resonator units; said plurality of resonator units being coupled with said at least one conductive member; and (d) at least one tunable dielectric varactor unit; each respective tunable dielectric varactor unit of said at least one tunable dielectric varactor unit being coupled with said at least one conductive member at a respective intermediate locus; each said respective intermediate locus being situated between a respective pair of said plurality of resonator units; each respective tunable dielectric varactor unit of said at least one tunable dielectric varactor unit comprising a substrate, a layer of voltage tunable dielectric material established in a first area on said substrate, a first electrode structure for receiving an electrical signal established in a second area on said first area, and a second electrode structure for receiving an electrical signal established in a third area on said first area; said second area and said third area being separated by a gap; said voltage tunable dielectric material being a paraelectric material having an operating temperature greater than its Curie temperature.