Bidirectional coupling between waveguides via two nonreciprocal gyromagnetic coupling rods

Claim 1

AN ELECTROMAGNETIC DEVICE COMPRISING A MAIN RECTANGULAR WAVEGUIDING STRUCTURE FOR PROPAGATING AN ELECTROMAGNETIC WAVE; AN AUXILIARY RECTANGULAR WAVEGUIDING STRUCTURE HAVING A BROAD SIDE OF SAID MAIN WAVE GUIDING AT AN ANGLE WITH A BROAD SIDE DISPOSED ADJACENT TO AND STRUCTURE; FIRST AND SECOND THIN ELONGATED FERRITE RODS DISPOSED TRANSVERSELY THROUGH MATCHING APERTURES OF SAID ADJACENT BROAD SIDES ALONG A DIAGONAL OF THE COEXTENSIVE AREAS THEREOF TO EXTEND INTO BOTH OF SAID WAVEGUIDING STRUCTURES, SAID FIRST AND SECOND FERRITE RODS BEING SPACED ON OPPOSITE SIDES OF THE MID-POINT OF SAID DIAGONAL; AND MEANS FOR PRODUCING PARALLEL MAGNETIC FIELDS IN THE SAME DIRECTION LENGTHWISE THROUGH SAID FIRST AND SECOND FERRITE RODS, THEREBY TO EFFECT BI-DIRECTIONAL COUPLING BETWEEN SAID MAIN AND AUXILIARY WAVEGUIDES AT FREQUENCIES CORRESPONDING TO GYRO-RESONANCE IN SAID FIRST AND SECOND FERRITE RODS.