Selectable frequency dielectric filter having a ganged relation

Details Selectable frequency dielectric filter having a ganged relation Selectable frequency dielectric filter having a ganged relation

1994-11-21

1996-05-07

Lee, Benny T.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333134, H01P 1202

Patent

active

055150179

ABSTRACT:
Coupling capacitors are connected between an input end and an output end, a resonator is connected between each of the coupling capacitor and the ground, and a capacitor and a switch are connected between one end of each resonator and the ground. When the capacitor is off, the frequency is set to the resonance frequency of the resonator, and when the switch is turned on, the capacitor is connected parallel to the resonator, so that the resonance frequency is shifted to a lower value, whereby a dielectric filter having multiple frequencies can be obtained.

REFERENCES:
patent: 4162446 (1979-07-01), Cochran
patent: 4186360 (1980-01-01), Ohashi
patent: 4694262 (1987-09-01), Inoue et al.
patent: 4980660 (1990-12-01), Nakamura et al.
patent: 5065120 (1991-11-01), Munn
patent: 5227748 (1993-07-01), Sroka
patent: 5241693 (1993-08-01), Kim et al.
patent: 5387886 (1995-02-01), Takalo et al.
European Search Report dated Mar. 9, 1995.

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