High-polarization isolation plane ultra-wideband modular antenna array

The invention discloses a high-polarization isolation plane ultra-wideband modular antenna array, which is formed by arranging a plurality of array units along two orthogonal directions, and is characterized in that each array unit comprises a plane folding dipole, a feed structure, a vertical cross coupling metal wall and a metal floor; the planar folding dipole comprises a capacitance compensation part and a main body radiation part which are printed on the two sides of the dielectric substrate, and the capacitance compensation part and the main body radiation part are electrically connected through a metal through hole penetrating through the dielectric substrate; the feed structure is arranged on one side, close to the main body radiation part, of the dielectric substrate and is connected with the main body radiation part; the vertical cross coupling metal wall is arranged on one side of the dielectric substrate close to the main body radiation part, one end of the vertical cross coupling metal wall is co