Dielectric filter

Details Dielectric filter Dielectric filter

1997-02-13

1998-11-24

Ham, Seungsook

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333206, H01P 1202, H01P 1205

Patent

active

058413316

ABSTRACT:
Resonance holes whose inner surfaces are covered with an inner conductor (or other inner conductor structures) are formed in a dielectric block such that the resonance holes extend between two opposing end faces. The outer surface of the dielectric block is covered with an outer conductor. Input/output electrodes are formed out of part of the outer conductor at predetermined locations on the surface of the dielectric block. A slot is formed near one end face of the dielectric block so that the inner conductors are separated by the slot into isolated parts. By means of the slot, an electrically open end of each resonator is formed at a location spaced inward from the physical end face. Thus it is possible to produce a low-cost high-performance dielectric filter in which an electrically open end is formed with high accuracy at a location spaced inward from the physical end face of a dielectric block.

REFERENCES:
patent: 4668925 (1987-05-01), Towatari et al.
patent: 4757284 (1988-07-01), Ueno
patent: 4890079 (1989-12-01), Sasaki
patent: 5329687 (1994-07-01), Scott et al.
patent: 5572174 (1996-11-01), Kitaichi et al.
patent: 5642084 (1997-06-01), Matsumoto et al.

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