Dielectric resonator capable of varying resonant frequency

摘要

A dielectric resonator capable of adjusting a resonance frequency, reducing occurrence of a mode jump if it is applied to an oscillator and being manufactured at a low cost. The dielectric resonator has a pair of upper and lower opposing conductive plates (211, 212); a dielectric substrate (3) disposed between the conductive plates (211, 212); a first electrode (1) formed on one surface of the dielectric substrate (3), the first electrode (1) having a first opening (4); a second electrode (2) formed on another surface of the dielectric substrate (3), the second electrode having a second opening (5) corresponding to the first opening (4) so that a resonator is formed by a portion of the dielectric substrate (3) disposed between the first and second openings (4, 5); and a variable capacitor (70, 71; 90a, 90b) located in a portion of the dielectric substrate (3) in which an applied electromagnetic field is confined in and around the resonator. <IMAGE>