Planar antenna

Claim 1

An antenna of generally planar configuration having an antenna surface for receiving incident microwaves transmitted from a geostatic broadcasting satellite on SHF band, said antenna comprising: a planar radiation circuit of electrically conductive material disposed between and supported by two layers of synthetic resin material, said radiation circuit forming first and second surfaces, said first surface defining said antenna surface, a planar power supply circuit formed of patches of electrically conductive material disposed between and supported by two layers of synthetic resin material, said power supply circuit having a power supply point and forming third and fourth surfaces, said third surface facing said second surface, a planar ground conductor forming a fifth surface facing said fourth surface and defining an electrical ground for said radiation and power supply circuits, and first spacing means for separating said radiation and power supply circuits from one another in a manner forming a first space therebetween, second spacing means separating said power supply circuit and said ground conductor from one another in a manner forming a second space therebetween, said radiation circuit being electromagnetically coupled to said power supply circuit through said first space in response to an antenna-actuating power supply.