Circular polarization cassegrain antenna

Claim 1

A CIRCULAR POLARIZATION ANTENNA COMPRISING A PRIMARY FEED SOURCE EMITTING CIRCULARLY POLARIZED WAVES OF ELECTROMAGNETIC ENERGY HAVING A FIRST SENSE OF POLARIZATION, A SUB-REFLECTOR DISPOSED TO RECEIVE SAID WAVES EMITTED FROM SAID SOURCE, SAID SUB-REFLETOR INCLUDING A SURFACE REFLECTIVE TO LINEARLY POLARIZED WAVES POLARIZED IN A FIRST PLANE AND TRANSPARENT TO LINEARLY POLARIZED WAVES POLARIZED IN A SECOND PLANE ROTATED 90* FROM SAID FIRST PLANE, SAID SUB-REFLECTOR INCLUDING POLARIZATION CONVERSION GRIDS DISPOSED ON OPPOSITE SIDES OF SAID SURFACE FOR CONVERTING CIRCULARLY POLARIZED WAVES HAVING SAID FIRST AND SECOND SENSES OF POLARIZATION TO LINEARLY POLARIZED WAVES POLARIZED IN SAID FIRST AND SECOND PLANES RESPECTIVELY AND CONVERTING LINEARLY POLARIZED WAVES POLARIZED IN SAID FIRST AND SECOND PLANES TO CIRCULARLY POLARIZED WAVES HAVING SAID FIRST AND SECOND SENSES OF POLARIZATION RESPECTIVELY, SAID A FLAT PLATE MAIN REFLECTOR TRANSPIERCED BY SAID FEED SOURCE AND DISPOSED TO RECEIVE AND RE-REFLECT WAVES REFLECTED FROM SAID SUB-REFLECTOR, SAID MAIN REFLECTOR INVERTING THE SENSE OF POLARIZATION OF CIRCULARLY POLARIZED WAVES INCIDENT THEREON WHEREBY A PORTION OF THE RADIATED ELECTROMAGNETIC ENERGY IS REFLECTED FROM SAID MAIN REFLECTOR DIRECTLY INTO SPACE AS CIRCULARLY POLARIZED WAVES HAVING SAID SECOND SENSE OF POLARIZATION AND THE REMAINDER OF SAID ENERGY IN REFLECTED FROM SAID MAIN REFLECTOR THROUGH SAID SUB-REFLECTOR INTO SPACE AS CIRCULARLY POLARIZED WAVES HAVING SAID SECOND SENSE OF POLARIZATION.