US 3,967,218 AGranted

Edge-guided wave directional combiner

AssigneeThe United States of America as represented by the Secretary of the Army

InventorJoseph W. McGowan

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Abstract

An edge-guided mode microstrip device having a pair of input ports and a mon output port, with two separate ferrite substrates each having a microstrip conductor electrically connected between a respective input port and the common output port. Both microstrip conductors additionally each have a conductive or inner edge spanned by a resistive film which acts as a resistive load. The other or outside conductive edge of each of the conductors includes an exponentially tapered segment which when a predetermined biasing magnetic field is applied transversely relative to the field of the substrates, causes input microwave energy at the two input ports to travel along the respective exponentially tapered edges and combine at the common output port. Any reflective energy returning from the output port will travel along the inner edges and be absorbed in the resistive load.

Claims11

Dependent claims

An edge-guided mode microwave transmission device, comprising in combination:

a ground plane;
ferromagnetic substrate means of a predetermined thickness located on said ground plane;
at least two mutually separated stripline conductors of substantially like conductor patterns formed on said substrate means, each pattern having a pair of conductive edges, one edge of which includes at least one tapered edge segment adapted to effect energy transfer therealong for a predetermined biasing magnetic field;
means providing a biasing magnetic field of a predetermined magnitude and which is applied transverse to said ground plane;
resistive load means commonly applied over a predetermined length of the other conductive edge of said at least two conductors;
a first signal port coupled to one end of one of said two conductors;
a second signal port coupled to a like end of the other of said two conductors;
and
a third signal port commonly coupled to the opposite end of said two conductors.

6 more elements

Dependencies are inferred from the claim text.