Patent ID: 8334814

Claim:
An antenna for circular polarization, comprising: a) an electrical dipole radiator ( 1 ); b) an electrically conductive base surface ( 2 ) having a front side and a back side, and having an antenna connection location ( 12 ) on said front side, wherein said electrical dipole radiator ( 1 ) is coupled to said electrically conductive base surface ( 2 ) and runs at a distance along said front side of said electrically conductive base surface ( 2 ) and in a plane of symmetry (SE) oriented perpendicular to said electrically conductive base surface ( 2 ), wherein said electrical dipole radiator ( 1 ) is oriented essentially parallel to the electrically conductive base surface ( 2 ), c) a dipole feed line ( 6 ) coupled at a first end to said electrical dipole radiator ( 1 ), said dipole feed line having a dipole connection location ( 8 ) which connects to said electrical dipole radiator ( 1 ), wherein said dipole feed line ( 6 ) runs in the plane of symmetry SE toward the electrically conductive base surface ( 2 ), d) a slot radiator ( 3 ) configured in and coupled to said front side of said electrically conductive base surface ( 2 ), said slot radiator having a longitudinal expanse ( 4 ) along an intersection line between the plane of symmetry SE and said electrically conductive surface ( 2 ), said slot radiator ( 3 ) comprising: i) a plurality of longitudinal edges ( 18 ); ii) at least one slot radiator connection location ( 7 ); iii) a plurality of connection points ( 19 , 25 ) configured to connect said dipole feed line ( 6 ) to said slot radiator, said plurality of connection points ( 19 , 25 ) comprising at least one set of connection points situated at said plurality of longitudinal edges ( 18 ) and lying opposite one another wherein said at least one set of connection points ( 19 ) are disposed in said at least one slot radiator connection location ( 7 ); e) a combining network ( 13 ) comprising a connection between said electrical dipole radiator ( 1 ) having said dipole feed line ( 6 ), said slot radiator ( 3 ), and said antenna connection location ( 12 ); wherein said electrical dipole radiator ( 1 ) and said slot radiator ( 3 ) are tuned to one another in their resonance frequencies, in terms of magnitude and phase, so that circular polarization exists in a remote field at a frequency at which said radiators are tuned to one another.