Dielectric filter with variable central frequency

Details Dielectric filter with variable central frequency Dielectric filter with variable central frequency

1985-05-23

1987-12-22

Gensler, Paul

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333235, H01P 120

Patent

active

047149060

ABSTRACT:
A dielectric filter with variable central frequency is provided comprising at least one dielectric resonator formed from a dielectric ceramic body covered with electrodes as well as electromagnetic input and output means for coupling the signal to and from the filter. According to the invention, the filter further comprises a variable capacity connected between the electrodes of the resonator, in a capacitive zone of said resonator, for continuously varying the central frequency of said filter.

REFERENCES:
patent: 3747032 (1973-07-01), Hall et al.
patent: 3766494 (1973-10-01), Anbe et al.
patent: 3889214 (1975-06-01), Petitjean et al.
patent: 4179673 (1979-12-01), Nishikauo et al.
patent: 4477786 (1984-10-01), Tamura et al.
patent: 4568895 (1986-02-01), Reed
Uwano, Tomoki, "Ceramic-Filled Resonator Cuts Cost of Radio Telephone Filters", Electronics; Jul. 14, 1983; pp. 129-131.
D'Albaret, Bertrand; "A New Generation of UHF Filters from 300 MHz to Some Ghz", Using Dielectric Resonaters.

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