Dielectric filter

Details Dielectric filter Dielectric filter

1997-10-17

1999-08-10

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333207, H01P 1205

Patent

active

059364912

ABSTRACT:
In a dielectric filter comprising a dielectric ceramic block which is provided with three or more than three resonators arranged in parallel with each other and a pair of input/output pads formed on a lateral side of the dielectric ceramic block, arranged at locations close to the open top of the dielectric ceramic block and facing the respective outer resonators and capacitively coupled to the respective outer resonators, the effective resonant length of the outer resonators is increased by forming extended conductors extending from the respective edges of the openings of the outer resonators to minimize the effect of the input/outputs and make the resonant frequencies of the outer resonators agree with that of the central resonator.

REFERENCES:
patent: 4745379 (1988-05-01), West et al.
patent: 4768003 (1988-08-01), Kawakami et al.
patent: 4855093 (1989-08-01), Matsukura et al.
patent: 4987393 (1991-01-01), Yorita et al.
patent: 5146193 (1992-09-01), Sokola
patent: 5218329 (1993-06-01), Vangala et al.
patent: 5525946 (1996-06-01), Tsujiguchi et la.
Patent Abstracts of Japan, vol. 9, No. 181 (E-331), Jul. 26, 1985 & JP 60 052102 A (OKI Denki Kogyo KK), Mar. 25, 1985.
Patent Abstracts of Japan, vol. 9, No. 318 (E-366), Dec. 13, 1985 & JP 60 152102 A (Murata Seisakusho:KK)), Aug. 10, 1985.

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