Structure for realizing wideband wide-angle scanning and microstrip antenna unit having structure

The invention belongs to the technical field of phased array radar antennas, and particularly relates to a structure for realizing wideband wide-angle scanning and a microstrip antenna unit having the structure. The structure comprises a metal floor, a feed layer dielectric substrate, a radiation layer dielectric substrate, metal columns and metal patches. The lower surface of the feed layer dielectric substrate is fit with the metal floor, and a copper layer is etched on the upper surface. A first metal isolation electric wall is arranged on the four corners of the feed layer dielectric substrate. The first metal isolation electric wall is connected with the metal floor and the copper layer. The radiation layer dielectric substrate is adhered on the upper surface of the feed layer dielectric substrate through a semi-cured sheet. The metal columns are 1/4 cylindrical. The metal columns are arranged on the four corners of the radiation layer dielectric substrate, the central axis of each metal column coincides