High-gain circularly polarized vortex wave generator

The invention belongs to the technical field of antennas, relates to a vortex wave generator, and particularly provides a high-gain circularly polarized vortex wave generator, which is used for solving the problems of complex feeding, limited application scene, low spectrum utilization rate and the like in the prior art. The invention designs a circular polarization metasurface capable of independently controlling transmission and reflection amplitudes and phases of left-handed and right-handed electromagnetic waves, and a mismatching state of the circular polarization metasurface is used as a partial reflection surface of a Fabry-Perot resonant cavity antenna; meanwhile, a polarization rotation surface capable of controlling the polarization rotation direction of a reflected wave is designed, and an air cavity is formed between the polarization rotation surface and the circular polarization metasurface. After left-handed or right-handed circularly-polarized electromagnetic waves are emitted by the feed sourc