Circularly polarized wide-beam microstrip antenna with stable phase center

The utility model discloses a circularly polarized wide-beam microstrip antenna with a stable phase center, which comprises a dielectric substrate, and the upper surface and the lower surface of the dielectric substrate are respectively provided with a radiation patch and a grounding plate; a pair of circular grooves with the same radius is hollowed on each of two diagonal lines of the radiation patch, the radiuses of the two pairs of circular grooves on the two diagonal lines are different, and a pair of rectangular grooves is formed in the perpendicular bisectors of two opposite sides of the radiation patch. The perpendicular bisectors of the two opposite sides of the radiation patch are respectively provided with a pair of rectangular grooves with the same size, the axial ratio beam width of the antenna is increased, two pairs of circular grooves with different radiuses are hollowed out in the two diagonal lines, the circularly polarized radiation characteristic of the antenna is achieved, and through the