Patent ID: 7256661
Filing Date: 2007-08-14
Classification: H01P

Abstract:
1. A multi-channel, non-reciprocal, microstrip, electromagnetic wave propagation apparatus comprising: a first ferromagnetic substrate forming a first energy propagation channel, and having a plurality of RF transmission traces on a first surface and a ground plane on a second surface, one of said traces forming an input port and a different one of said traces forming an output port; a second ferromagnetic substrate forming a second energy propagation channel, and having a plurality of RF transmission traces on a first surface and a ground plane on a second surface, one of said traces on said second substrate forming an input port and a different one of said traces on said second substrate forming an output port; the first and second ferromagnetic substrates placed against one another so that their respective said ground planes are facing one another and in abutting contact; and a magnet disposed against one of said first and second substrates so as to be disposed against said RF transmission traces of said one substrate, to excite a circular, unidirectional magnetic flux field in each of the substrates that limits electromagnetic wave propagation to one direction only in each said energy propagation channel.