Patent ID: 9293836
Filing Date: 2016-03-22
CPC Classification: H01Q

Claim Text:
1. An antenna apparatus comprising: a reflector including a concave curved surface for reflecting a radio wave, a rear surface positioned on a back side of the concave curved surface, a radio axis of the radio wave reflected by the concave curved surface, and a focal position of the concave curve; a radiator arranged in the focal position of the concave curved surface of the reflector and configured to perform at least one of transmission of the radio wave of two linearly polarized waves toward the concave curved surface of the reflector and reception of the radio wave from the concave curved surface, the two linearly polarized waves being crossed orthogonally to each other; and a structural unit configured to support the radiator at the focal position, wherein a radiation space is defined between the concave curved surface of the reflector and the radiator, two linear polarization planes are defined by two linearly polarized waves on the concave curved surface, and the structural unit includes a main body provided with first and second waveguides protruding from the rear surface of the reflector into the radiation space at two positions on the concave curved surface of the reflector, the two positions being apart from the two linear polarization planes in both sides of one of the two linear polarization planes and being symmetric with each other, and the first and second waveguides extending along the radio axis to be in parallel to the radio axis to an outside of the radiation space and having extending end portions connected to the radiator.