Multi-passband dielectric filter construction having filter port

Details Multi-passband dielectric filter construction having filter port Multi-passband dielectric filter construction having filter port

1992-04-30

1993-10-05

Pascal, Robert J.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333134, H01P 1205

Patent

active

052509168

ABSTRACT:
A filter duplexer, such as a filter duplexer for a radio transceiver, of minimum dimensions is disclosed. A first filter portion of the duplexer filter includes resonators of a first geometric configuration, and a second filter circuit portion of the duplexer filter comprises resonators of a second geometric configuration. The geometric configuration of the two filter circuit portions are dissimilar such that relative characteristic admittances of the resonators of the respective filter circuit portions are dissimilar. Because the resonators of the two filter circuit portions are of dissimilar electrical characteristics, a desired frequency response of the duplexer filter may be obtained with similar resonator loading capacitances.

REFERENCES:
patent: 4733208 (1988-03-01), Ishikawa et al.
patent: 4742562 (1988-05-01), Kommrusch
patent: 4879533 (1989-11-01), de Muro et al.
patent: 4954796 (1990-09-01), Green et al.

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