Dielectric filter having an inner conductor with two open-circui

Details Dielectric filter having an inner conductor with two open-circui Dielectric filter having an inner conductor with two open-circui

1999-03-02

2000-04-25

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333222, H01P 1202, H01P 704

Patent

active

060549106

ABSTRACT:
A dielectric filter comprising: a dielectric block including a first elongated sub-block and a second elongated sub-block each having a corresponding pair of longitudinally opposing end faces, and an outer surface, said sub-blocks being disposed adjacent one another; a first longitudinally extending through-hole disposed between the first pair of longitudinally opposing end faces of said first sub-block, the first through-hole having two outer ends and an inner surface; a first inner conductor formed on the inner surface of said first through-hole, said first inner conductor having outer ends; an outer conductor formed on the outer surface of said dielectric block but not electrically coupled to the outer ends of the first inner conductor such that the outer ends of the first inner conductor are open-circuited; a first connection conductor through which a predetermined part of the first inner conductor between its outer ends is connected to said outer conductor; a second longitudinally extending through-hole disposed between the second pair of longitudinally opposing end faces of said second sub-block, the second through-hole having two outer ends and an inner surface; a second inner conductor formed on the inner surface of said second through-hole, said second inner conductor being electrically connected to said outer conductor at its outer ends such that they are short-circuited, said inner conductor having a pair of open-circuited inner ends disposed at a predetermined location between its two outer ends, wherein said first and second sub-blocks of said dielectric block are longitudinally shifted relative to one another.

REFERENCES:
patent: 4151494 (1979-04-01), Nishikawa et al.
patent: 5130683 (1992-07-01), Agahi-Kesheh et al.
patent: 5489882 (1996-02-01), Ueno
patent: 5525946 (1996-06-01), Tsujiguchi et al.
patent: 5557246 (1996-09-01), Ishihara et al.
patent: 5712604 (1998-01-01), Tada et al.
Patents Abstracts of Japan--E-1257 Sep. 2, 1992, vol. 16/No. 415.

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