Switchable dual mode directional filter system

Details Switchable dual mode directional filter system Switchable dual mode directional filter system

1992-02-10

1993-02-02

Pascal, Robert J.

Wave transmission lines and networks

Coupling networks

Wave filters including long line elements

333110, 333230, H01P 1208

Patent

active

051840987

ABSTRACT:
A switchable dual mode directional filter system includes two identical filters coupled to input and output waveguides at the same plane in phase quadrature. Each waveguide has two ports through which the signal enters and exists. One of the filters has a switching device incorporated therein for selecting the desired output port. One embodiment of the switching device includes a pair of coupling members that extend radially inward within the cavity of the filter toward a central axis. These coupling members define two coupling positions for the system. Solenoids move the two coupling members into and out of the cavity of the filters. Only one coupling member is used at a given time. This switching device is designed to change the polarity of one of the components of the signal wave to change its wave characteristics in the output waveguide. As a result, the desired port of the output waveguide can be selected easily.

REFERENCES:
patent: 2595680 (1952-05-01), Lewis
patent: 4554553 (1985-11-01), Grim
patent: 4780694 (1988-10-01), Kick et al.
patent: 4965868 (1990-10-01), Wong et al.

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