Dielectric filter and dielectric duplexer

Details Dielectric filter and dielectric duplexer Dielectric filter and dielectric duplexer

1998-12-16

2000-12-19

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

207127, 207134, H01P 120, H01P 308, H01P 512

Patent

active

061632376

ABSTRACT:
The invention provides a dielectric filter, comprising: a dielectric block having substantially rectangular shape, said dielectric block including a first and a second opposed to each other and a third and a fourth opposed to each other and extending between said first and second surfaces; a plurality of through holes extending between said first and second surfaces; an inner conductor provided on an inner surface of said through holes except for a non-conductive portion, said non-conductive portion being disposed on said inner surface of said through holes in the vicinity of said first surface of said dielectric block; an outer conductor provided on said third and fourth surfaces of said dielectric block; and a line conductor provided on said first surface of said dielectric block, a part of said outer conductor provided on said third surface of said dielectric block and a part of said outer conductor provided on said fourth surface of said dielectric block being connected to each other via said line conductor; thereby a plurality of resonators comprising a combination of a TEM mode resonator and a TE mode resonator, and a combination of a TEM mode resonator or a TM mode resonator being provided.

REFERENCES:
patent: 4757288 (1988-07-01), West
patent: 5537082 (1996-07-01), Tada et al.
patent: 5929725 (1999-07-01), Toda et al.
Patent Abstracts of Japan, vol. 13, No. 155 (E-743), Apr. 14, 1989 & JP 63 312701 A (Murata Mfg Co Ltd) Dec. 21, 1988, abstract.
European Search Report dated Mar. 31, 1999.

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