Resonant frequency compensated dielectric filter

Details Resonant frequency compensated dielectric filter Resonant frequency compensated dielectric filter

1997-10-17

1999-08-31

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333207, H01P 1205

Patent

active

059458950

ABSTRACT:
In a dielectric filter comprising a dielectric ceramic block which is provided with three or more than three resonators juxtaposed and a pair of input/output pads formed on the peripheral surface of the dielectric ceramic block, arranged opposite to each other at locations close to a short-circuiting end surface of the dielectric ceramic block and facing the respective outermost resonators and electrically connected to the respective outermost resonators by way of respective connecting conductive paths, the effect of lowering the resonant frequency of the outermost resonators by the input/output pads can be offset by arranging a strip-shaped electrode-free zone extending from the edge of the opening of the central resonator in the direction perpendicular to the longer edges of the short-circuiting end surface.

REFERENCES:
patent: 4464640 (1984-08-01), Nishikawa et al.
patent: 4745379 (1988-05-01), West et al.
patent: 4987393 (1991-01-01), Yorita et al.
patent: 5525946 (1996-06-01), Tsujiguchi et al.
patent: 5528207 (1996-06-01), Ito
patent: 5642084 (1997-06-01), Matsumoto et al.

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