Vortex electromagnetic wave generating device

The invention provides a vortex electromagnetic wave generating device for solving the problem that the effective working frequency range of the existing vortex wave generating device is narrow. The vortex electromagnetic wave generating device comprises a microwave lens, a metal reflection plate and a feed source; the microwave lens is a cylindrical structure composed of a plurality of fan-shapedcolumn structures, each fan-shaped column structure is stacked by a plurality of fan-shaped structures, and the fan-shaped structure is composed of a partial basic unit located and the center and a plurality of fan-shaped arcs; the basic unit is composed of three mutually perpendicular cylinders, the cylindrical radiuses of various layers of base units of the microwave lens progressively decreasefrom top to bottom, the cylindrical radiuses of the same layer of basic units decrease from the inside to the outside, the cylindrical radiuses of the basic units in the same fan-shaped arc are the same, and the cylindrical r