Dielectric filter having tunable resonating portions

Details Dielectric filter having tunable resonating portions Dielectric filter having tunable resonating portions

1997-03-14

1999-12-07

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333207, H01P 1205

Patent

active

059990708

ABSTRACT:
A block type dielectric filter including a dielectric block and a plurality of through holes wherein a resonance frequency at individual resonating portions can be set at a specific value even when the dielectric filter is miniaturized. The resonance frequencies can be varied at the individual resonating portions simply by creating a slight change in a coupling factor. The plurality of through holes are provided extending from one surface of the dielectric block toward an opposite surface. The surfaces except for an open end surface are clad with a conductive material layer and a groove is provided on the open end surface between a set of adjacent through holes. The groove is provided offset toward a through hole by an offset quantity.

REFERENCES:
patent: 4464640 (1984-08-01), Nishikawa et al.
patent: 4733208 (1988-03-01), Ishikawa et al.
patent: 4806889 (1989-02-01), Nakano et al.
patent: 5208566 (1993-05-01), Kenoun et al.

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