Circularly polarized antenna unit and antenna three-dimensional array thereof

The circularly polarized antenna unit comprises a high-frequency dielectric plate, a radiation patch arranged at the center of the first surface of the high-frequency dielectric plate, an antenna reflection aluminum plate arranged at the second surface of the high-frequency dielectric plate, and an SMA connector arranged at the center of the second surface of the antenna reflection aluminum plate. The invention also discloses an antenna three-dimensional array, which comprises a support frame, a circularly polarized antenna unit and a switching layer. Wherein the supporting frame comprises a top face and a plurality of supporting beams, the top face is a plane, the supporting beams are distributed around the top face in an equiaxial mode, each supporting beam is of a multi-section bent structure, the first section is connected to the edge of the top face, the Nth section is connected to the mounting flange, and in the first section to the (N-1) th section, normal vectors of all the sections do not intersect.