Microwave ferromagnetic phase shifter having controllable d. c. magnetization

Claim 1

A FERROMAGNETIC DEVICE FOR APPLYING A CONTROLLABLE PHASE SHIFT TO RF ENERGY PROPAGATING THROUGH SAID DEVICE COMPRISING: (A) A FERROMAGNETIC ELEMENT HAVING A CENTRL BORE, (B) MEANS, INCLUDING A D.C. MAGNETIZING CURRENT CONDUCTOR WOUND THROUGH SAID BORE, FOR SELECTIVELY APPLYING WITHIN SAID ELEMENT A D.C. MAGNETIZATION ORIENTED IN ONE OF TWO OPPOSING DIRECTIONS, (C) A CONDUCTOR HAVING COUPLED THERETO SAID RF ENERGY, SAID CONDUCTOR BEING WOUND ALONG SAID ELEMENT SO AS TO PRODUCE IN RESPONSE TO SAID RF ENERGY A ROTATING RF MAGNETIC FIELD WITHIN SAID ELEMENT DISPOSED IN ORTHOGONAL SPATIAL RELATIONSHIP WITH SAID MAGNETIZATION, SAID RF ENERGY BEING OF SUFFICIENTLY HIGH FREQUENCY CAPABLE OF SUPPORTING INTERACTION BETWEEN SAID RF MAGNETIC FIELD AND PROCESSING ELECTRON SPINS OF SAID FERROMAGNETIC ELEMENT, WHEREBY AN APPLIED D.C. MAGNETIZATION IN ONE DIRECTION PROVIDES AN APPRECIABLE INTERACTION AND THEREBY AND AN APPLIED D.C. OF THE PROPAGATING RF ENERGY AND AN APPLIED D.C. MAGNETIZATION IN A SECOND DIRECTION PROVIDES ESSENTIALLY NON INTERACTION AND THEREBY A SECOND PHASE DELAY OF SAID PROPAGATING RF ENERGY