Patent ID: 6249195
Filing Date: 2001-06-19
Classification: H01P,H04B

Abstract:
A dielectric filter comprising:a plurality of dielectric resonators defined by a dielectric substrate, electrodes formed on mutually opposing surfaces thereof, a plurality of pairs of openings formed in the electrodes on the mutually opposing surfaces and corresponding respectively to the plurality of dielectric resonators, and a conductor disposed spaced away from the dielectric substrate by a specified distance; andinput-output couplings coupled electromagnetically to an input-stage dielectric resonator and an output-stage dielectric resonator, respectively, among the plurality of dielectric resonators;wherein a respective electrode opening corresponding to at least one of the input-stage dielectric resonator and the output-stage dielectric resonator has a polygonal configuration; andwherein at least one of the dielectric resonators other than the input-stage and output-stage dielectric resonators has an electrode opening whose configuration is substantially circular.