Complete simplified homing system for aircraft

Claim 1

A MICROWAVE RECEIVER FOR HOMING ON A GIVEN TRANSMITTER RADIATING AN AMPLITUDE MODULATED, POLARIXED SIGNAL, SAID RECEIVER HAVING AN AXIS OF DIRECTIVITY AND PROVIDING INFORMATION AS TO THE ANGULAR ERROR BETWEEN SAID AXIS OF DIRECTIVITY AND SAID TRANSMITTER IN THE PLANE OF AT LEAST ONE OF THE ELECTRIC AND MAGNETIC FIELD COMPONENTS OF SAID SIGNAL, AND RECEIVER COMPRISING: A SINGLE APERTURE MICROWAVE ANTENNA OF SUFFICIENT SIZE TO SUSTAIN HIGHER ORDER MODES, SAID ANTENNA BEING SYMMENTRICAL ABOUT SAID AXIS OF DIRECTIVITY WHEREBY BOTH SYMMENTRICAL AND UNSYMMETRICAL MODE ENERGY ARE EXCITED THEREIN UPON ILLUMINATION THEREOF BY SAID SIGNAL WHEN SAID PLANE OF SAID COMPONENT IS UNSYMMETRICAL ABOUT SAID AXIS OF DIRECTIVITY WHEREAS ONLY SYMMETRICAL MODE ENERGY IS EXCITED THEREIN UPON ILLUMINATION THEREOF BY SAID SIGNAL WHEN SAID PLANE OF SAID COMPONENT IS SYMMENTRICAL ABOUT SAID AXIS OF DIRECTIVITY; DETECTOR MEANS COUPLED TO SAID ANTENNA FOR DETECTING THE MODULATION COMPONENTS OF SAID SYMMETRICAL AND SAID UNSYMMETRICAL MODE ENERGY;