Band selectable tunable bandpass filter

Details Band selectable tunable bandpass filter Band selectable tunable bandpass filter

1982-05-25

1984-06-26

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Frequency domain filters utilizing only lumped parameters

333177, 333185, 333202, H03H 709, H01P 1208

Patent

active

044568959

ABSTRACT:
A two resonator bandpass filter that is tunable is disclosed with each resonator consisting of three series connected inductors and a tuning capacitors. The inductors comprising each resonator are contained in a common enclosure isolated from each other by a ground shield having a fixed aperture opening for electromagnetic coupling between the two resonators. Shorting plugs are used as the bandswitching techniques for switching the bands of the resonators. Variable capacitors in each of the resonator's circuit provide for tuning of each band to a desired frequency.

REFERENCES:
patent: 2872649 (1959-02-01), Boothe
patent: 3903487 (1975-09-01), Maier
patent: 3959746 (1976-05-01), Straw
patent: 4153887 (1979-05-01), Poppa
patent: 4365221 (1982-12-01), Vizmuller

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