Bunching type multimode electromagnetic vortex generator

The invention discloses a bunching type multimode electromagnetic vortex generator, and belongs to the technical field of OAM wireless communication. The generator comprises a UCA primary radiation structure, a feed structure and a parabolic reflecting surface structure, the UCA primary radiation structure comprises N identical microstrip units which are uniformly and circumferentially arranged around the center at an angle of 360 degrees/N; the feed structure comprises a one-to-N path equant power divider, N phase shifters and N transmission feeder lines. The parabolic reflecting surface structure is located obliquely above the UCA primary radiation structure, and the UCA primary radiation structure is placed near the focus of the parabolic reflecting surface structure. According to the electromagnetic vortex generator disclosed by the invention, by controlling the feed phase difference between the units of the UCA primary radiation structure, the shielding of the UCA primary radiation structure on the refle