Ultra-wideband antenna based on fractal structure

The utility model discloses an ultra-wideband antenna based on a fractal structure, which comprises a dielectric substrate, and a feeder line, a radiation patch and ground lugs which are respectively arranged on the top surface of the dielectric substrate, the feeder line is connected with the radiation patch, two sides of the feeder line are respectively provided with the ground lugs, and the ground lugs are respectively connected with the radiation patch. The middle part of the radiation patch is provided with a flower-shaped fractal structure, the fractal structure comprises a first-order pattern structure, and the first-order pattern structure comprises n structural units which are uniformly distributed around the same central shaft; the structural unit comprises a first operation graph and a second operation graph, the first operation graph is of a first elliptical structure, and the second operation graph is of a second elliptical structure formed after the first operation graph is shrunk to 0.8 time an