Ladder-type ceramic filter

Details Ladder-type ceramic filter Ladder-type ceramic filter

1988-07-19

1989-06-20

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333190, H03H 958

Patent

active

048412643

ABSTRACT:
A ladder-type ceramic filter is formed of a plurality of series and parallel resonators arranged in series and in parallel between the input and output terminals. In this filter, a series resonator on the side of the input terminal has a resonant frequency lower than those of other series resonators and an antiresonant frequency higher than those of other series resonators. Further, a parallel resonator on the side of the output terminal has a resonant frequency lower than those of other parallel resonators and an antiresonant frequency higher than those of other parallel resonators.

REFERENCES:
patent: 1795204 (1931-03-01), Espenschied
patent: 1921035 (1931-09-01), Mason
patent: 4651109 (1987-03-01), Inoue

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