Dielectric resonator having a resonance region and a cavity adja

Details Dielectric resonator having a resonance region and a cavity adja Dielectric resonator having a resonance region and a cavity adja

1998-05-20

2000-08-15

Bettendorf, Justin P.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

3332191, H01P 710, H01P 120

Patent

active

061042617

ABSTRACT:
The invention provides a dielectric resonator for example in the TE010 mode characterized in that electrodes are formed on both principal surfaces of a dielectric plate in such a manner that influence of spurious waves propagating in a space between the electrodes and a conductive plate is prevented thus preventing the reduction in Qo and degradation in the attenuation characteristic in the frequency ranges outside the passband. The inner diameter of the cavity is selected such that when the cavity is regarded as a waveguide the cutoff frequency of the waveguide becomes higher than the resonant frequency of a resonance region and such that the inner diameter of the cavity is greater than a non-electrode part.

REFERENCES:
patent: 4675631 (1987-06-01), Waggett
patent: 4724403 (1988-02-01), Takayama
patent: 5220300 (1993-06-01), Snyder
Patent Abstracts of Japan, vo. 13, No. 513 (e-847), Nov. 16, 1989 & JP 01 208001 A (Murata Mfg. Co., Ltd.), Aug. 22, 1989, abstract.
European Search Report dated Aug. 28, 1998.

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