US 5,184,098 A · Switchable dual mode directional filter system

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.

Claims10

Dependent claims

A switchable mode directional filter system comprising:

a first filter and a second filer;
an input waveguide defining a first input port and a second input port;
an output waveguide defining a first output port and a second output port;
input coupling means for coupling an input electromagnetic signal from said input waveguide into each of said filters;
output coupling means for coupling signals outputted by said filters into said output waveguide;
and
means operatively associated with at least one of said filters for switching the output signal between said first and second output ports.

4 more elements

Dependencies are inferred from the claim text.

Switchable dual mode directional filter system

Life of this patent

Switchable dual mode directional filter system

Life of this patent

Abstract

Claims10