Distributed-constant filter

Details Distributed-constant filter Distributed-constant filter

1989-01-05

1990-02-13

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333202, 333223, 333226, H01P 1202

Patent

active

049010441

ABSTRACT:
A quarter-wave distributed-constant dielectric filter or resonator having a ceramic body which typically is composed principally of barium titanate. The ceramic filter body has one or more resonance holes extending therethrough. A conductive covering of silver or the like on the filter body has a portion formed on the surface defining each resonance hole. Mounted in each resonance hole is a prefabricated capacitor having a first terminal extending from within the resonance hole. The second terminal is electrically coupled to the conductive covering on the surface of the resonance hole. The capacitance of the capacitor or capacitors can be known before they are mounted to the filter body, so that the filter is readily manufacturable to exact electrical characteristics desired.

REFERENCES:
patent: 4398164 (1983-08-01), Nishikawa et al.
patent: 4464640 (1984-08-01), Nishikawa et al.
patent: 4730174 (1988-03-01), Nishikawa et al.

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