Substrate integration circular polarization double-frequency band antenna

The utility model discloses a substrate integration circular polarization double-frequency band antenna which is composed of a dielectric substrate, the upper and lower surfaces of which are coated with metal pasters. The dielectric substrate is in a T-shaped structure. The circumference, except the upper bottom edge, of the dielectric substrate is provided with equal-interval equal-radius first metallization through holes. The first metallization through holes run through the upper and lower metal pasters and form substrate integrated waveguide. The upper half portion and the lower half portion of the dielectric substrate are provided with a first X-shaped slit and a second X-shaped slit in the upper metal paster respectively. The circumferences of the two X-shaped slits are respectively provided with second metallization through holes. The substrate integration circular polarization double-frequency band antenna has the advantages of being capable of performing circular polarized radiation in two working fr