Drop-in magnetically tunable microstrip bandpass filter

Details Drop-in magnetically tunable microstrip bandpass filter Drop-in magnetically tunable microstrip bandpass filter

1991-01-04

1992-03-31

LaRoche, Eugene R.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333 34, H01P 1217

Patent

active

051011824

ABSTRACT:
A tunable bandpass filter comprises a flat ferrite body having first and ond spaced, coextensive microstrip conductive lines on its upper surface. A winding encircles the ferrite and conductive lines so that a variable d-c current in the winding varies the magnetic permeability of the ferrite and thus the center frequency of the filter.

REFERENCES:
patent: 3458837 (1969-07-01), Ngo
patent: 3539953 (1970-11-01), Jones
patent: 3986149 (1976-10-01), Harris et al.
patent: 4020429 (1977-04-01), Bickley

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