Coupling orthogonal polarizations in a common square waveguide with modes in individual waveguides

Claim 1

A SIGNAL COUPLER COMPRISING A HORN WITH A FIRST END OPENING AND A SECOND END OPENING OPPOSITE THERETO, WALL AREAS JOINING SAID OPENINGS, AND A CENTRAL PYRAMIDAL CORE WITHIN SAID HORN COACTABLE WITH SAID WALL AREAS FOR SMOOTHLY TRANSFORMING THE IMPEDANCE BETWEEN SAID OPENINGS, THE BASE OF SAID CORE BEING POSITIONED AT SAID FIRST OPENING, THE SIDES OF SAID CORE EXTENDING SUBSTANTIALLY THE ENTIRE DISTANCE BETWEEN SAID FIRST AND SECOND OPENINGS, AND COACTING WITH SAID WALL AREAS TO DEFINE A PLURALITY OF PAIRS OF WAVE PASSAGES SUBSTANTIALLY 90* APART FOR FIRST AND SECOND INDEPENDENT WAVE SIGNALS, FIRST AND SECOND GUIDE MEANS FOR COUPLING SAID FIRST AND SECOND INDEPENDENT WAVE SIGNALS TO SAID FIRST OPENING ABOUT THE BASE OF SAID CORE; EACH OF SAID GUIDE MEANS INCLUDING A PAIR OF OPENINGS FOR COUPLING INTO THEIR RESPECTIVE PAIR OF SAID WAVE PASSAGES, WITH THE WAVE ENERGY THEREIN BEING PROPAGATED SUBSTANTIALLY PARALLEL TO THE LONGITUDINAL AXIS OF SAID HORN, THE PAIR OF OPENINGS OF SAID FIRST SIGNAL COUPLER RESPECTIVELY LOCATED INTERMEDIATE OPPOSED FIRST AND THIRD BASE EDGE SURFACES OF SAID PYRAMIDAL CORE AND THE ADJACENT INNER WALL SURFACES OF SAID HORN; THE PAIR OF OPENINGS OF SAID SECOND SIGNAL COUPLER RESPECTIVELY LOCATED INTERMEDIATE OPPOSED SECOND AND FOURTH BASE EDGE SURFACES OF SAID PYRAMIDAL CORE AND THE ADJACENT INNER WALL SURFACES OF SAID HORN, SAID SECOND AND FOURTH BASE EDGE SURFACES PERPENDICULAR TO SAID FIRST AND THIRD BASE EDGE SURFACES AND EXTENDING THEREBETWEEN TO DEFINE A SQUARE ENCLOSED AREA WHEREIN THE BASE OF SAID PYRAMIDAL CORE IS CONTAINED, SAID PASSAGES MERGING TOWARDS THE APEX OF SAID PYRAMIDAL CORE, WHEREBY THE TWO WAVE SIGNALS ARE COMBINED AT THE CORE APEX LOCATED AT THE SECOND OPENING.