Low loss, fast switching, tunable filter circuit

Details Low loss, fast switching, tunable filter circuit Low loss, fast switching, tunable filter circuit

1992-08-14

1994-04-12

Gensler, Paul

Communications: directive radio wave systems and devices (e.g.,

Determining direction

With frequency or phase steering

333174, 333205, 333235, G01S 1300

Patent

active

053029585

ABSTRACT:
A low loss, fast switching, electronically tunable filter circuit which is microstrip compatible is obtained through the use of a resonant ring structure having two couplers, a low noise amplifier and a variable phase shifter. The tunable filter may advantageously be used in the receive channel of a transmit/receive module for phased arrays wherein the resonant frequency of the ring can be tuned anywhere in the operating frequency range so as to increase the dynamic range of the receiver.

REFERENCES:
patent: 3074033 (1963-01-01), Smith
patent: 4121182 (1978-10-01), Makimoto et al.
patent: 4450417 (1984-05-01), Folkmann
patent: 4724441 (1988-02-01), Fithian et al.
patent: 4758800 (1988-07-01), DiBiase et al.

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