Dielectric resonator electromagnetic wave filter

Details Dielectric resonator electromagnetic wave filter Dielectric resonator electromagnetic wave filter

1987-09-04

1989-03-07

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

3332191, 333234, 333235, H01P 1201, H01P 710

Patent

active

048109843

ABSTRACT:
A dielectric resonance electromagnetic filter for selection of a resonance frequency of a high frequency electromagnetic wave having the dielectric resonator attached directly to the shield. The filter is tunable using a tuning cylinder which moves through a cavity in the center of the resonator.
The tuning cylinder is hollow and is designed to expand thermally during heatup to counter thermal changes in the resonance frequency. The tuning cylinder may be metal or dielectric material or may have sections of both materials.
A shield geometry has been described which enables filter clusters to occupy a minimum volume.

REFERENCES:
patent: 2716222 (1955-08-01), Smullin
patent: 3311839 (1967-03-01), Rutulis
patent: 4050040 (1977-09-01), Fincke et al.
patent: 4241322 (1980-12-01), Johnson et al.
patent: 4423397 (1983-12-01), Nishikawa et al.
patent: 4524481 (1985-06-01), Kivi
patent: 4613838 (1986-09-01), Wada et al.
patent: 4639699 (1987-01-01), Nishikawa et al.
patent: 4646038 (1987-02-01), Wanat
patent: 4661790 (1987-04-01), Gannon et al.
patent: 4667172 (1987-05-01), Longshore et al.

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