Patent attributes
The present disclosure relates to a technical field of antennas for communication. Disclosed is a high-gain low-profile circularly polarized antenna. The antenna includes a circularly polarized patch, a composite dielectric high-impedance surface array, and a metal backplate. The circularly polarized patch includes a patch dielectric layer, wherein a first fan-shaped patch, a second fan-shaped patch, a third fan-shaped patch, and a fourth fan-shaped patch are formed on an upper surface of the patch dielectric layer; four coaxial feeding lines are arranged at positions that are close to a center of the patch dielectric layer; and an upper end of each of the coaxial feeding lines is electrically connected to one corresponding fan-shaped patch, and the other end of the each of the coaxial feeding lines penetrates the patch dielectric layer to extend to an outside of a lower surface of the patch dielectric layer.