Abstract: A signal separation method for a mixed vortex wave of nonlinear and linear vortex electromagnetic waves and an implementing device therefore are provided. The method includes separating information carried by the beam of the linear vortex electromagnetic wave from the full-aperture sampling reception vector of the mixed vortex wave beam by variable mode cyclic IFFT transformation, constructing the signal component of the linear vortex wave in the full-aperture sampling reception vector of the mixed vortex wave beam by the information carried and the Fourier sequence of the corresponding mode, subtracting the linear vortex wave signal vector from the full-aperture sampling reception vector of the mixed vortex electromagnetic wave beam to estimate the nonlinear vortex wave signal vector, and performing conjugate cyclic ZC transformation on the estimated nonlinear vortex wave signal vector to obtain the information carried by the beam of the nonlinear vortex electromagnetic wave.

Abstract: A high order vortex wave antenna includes N uniform circle array antennas. The uniform circle array antenna includes M antenna array elements distributed uniformly in axial symmetry on a first circle with a radius of r1. Each antenna array element coincides with an adjacent element after rotating around a center of the first circle by an angle of 2?/M Centers of the first circles of all uniform circle array antennas are distributed uniformly in axial symmetry on a second circle with a radius of r2. Each uniform circle array antenna coincides with an adjacent uniform circle array antenna after rotating around a center of the second circle by an angle of 2?/N.

Abstract: A high order vortex wave antenna includes N uniform circle array antennas. The uniform circle array antenna includes M antenna array elements distributed uniformly in axial symmetry on a first circle with a radius of r1. Each antenna array element coincides with an adjacent element after rotating around a center of the first circle by an angle of 2?/M Centers of the first circles of all uniform circle array antennas are distributed uniformly in axial symmetry on a second circle with a radius of r2. Each uniform circle array antenna coincides with an adjacent uniform circle array antenna after rotating around a center of the second circle by an angle of 2?/N.