Ganged radio frequency filter

Details Ganged radio frequency filter Ganged radio frequency filter

1975-05-20

1977-08-23

Smith, Alfred E.

Wave transmission lines and networks

Plural channel systems

333 31R, 333 73W, 343 16M, G01S 902, H01P 120

Patent

active

040443183

ABSTRACT:
A three channel electronically tunable filter arrangement for selecting radio frequency signals to be processed in a monopulse receiver is disclosed. Each channel of the disclosed filter arrangement includes an yttrium-iron-garnet (YIG) filter disposed in a common structure so that the resonant frequency of each channel may be controlled by the magnetic field of a single electromagnet. Also disclosed is an alignment method whereby the response of the YIG filter in each channel may be independently adjusted to eliminate any substantial imbalance between channels as the strength of the magnetic field is changed to change the resonant frequencies of such filters.

REFERENCES:
patent: 2649570 (1953-08-01), Radcliffe
patent: 3374436 (1968-03-01), Theiss
patent: 3435346 (1969-03-01), Allen et al.
patent: 3636452 (1972-01-01), Nuding
patent: 3821668 (1974-06-01), Cohen
patent: 3824500 (1974-07-01), Rothenberg

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