Dielectric filter and antenna duplexer

Details Dielectric filter and antenna duplexer Dielectric filter and antenna duplexer

1996-05-30

1998-01-27

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Antenna components

343756, 343873, 333134, H01Q 1502

Patent

active

057126488

ABSTRACT:
A dielectric filter includes a dielectric block on which an external conductor is formed except for areas surrounding input and output terminals, a plurality of resonator holes of the same axial length, and input and output external coupling bores. The resonator holes and input and output external coupling bores are formed substantially in parallel with each other between a pair of opposing end faces of the dielectric block. The resonator holes are provided with internal conductors except for dielectric bases in the vicinity of openings thereof. The internal conductors are connected to the external conductor at the pair of end faces so that resonators having specific resonator lengths are constituted by the positions of open ends thereof formed by the dielectric bases. The input and output external coupling bores are provided with internal conductors. The internal conductors are connected to the external conductor at one end face of the dielectric block and connected to the input and output terminals at the other end face of the dielectric block. Corresponding features are provided in an antenna duplexer.

REFERENCES:
patent: 3155975 (1964-11-01), Chatelain
patent: 5471180 (1995-11-01), Bromer et al.
patent: 5541616 (1996-07-01), Kawahata et al.
patent: 5578975 (1996-11-01), Kazama et al.

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