Millimeter wave dual-frequency circularly polarized metasurface antenna based on substrate integrated waveguide feed

The invention discloses a millimeter wave dual-frequency circularly polarized metasurface antenna based on substrate integrated waveguide feed, which comprises a metasurface with part of irregular units and an SIW dual-frequency T-shaped slot antenna, the metasurface with part of irregular units is composed of a first dielectric substrate and a metasurface layer, the metasurface layer is arranged on the front surface of the first dielectric substrate, and the SIW dual-frequency T-shaped slot antenna is arranged on the front surface of the first dielectric substrate. Comprising 13 square units with the same size, and the square units are periodically arranged; the SIW double-frequency T-shaped slot antenna comprises a second dielectric substrate, a first metalized through hole, a second metalized through hole and a third metalized through hole which penetrate through a second upper metal coating, the second dielectric substrate and a second lower metal coating are formed in the second dielectric substrate, and