Broadband high-isolation MIMO antenna

The invention belongs to the technical field of MIMO antennas, and particularly relates to a broadband high-isolation MIMO antenna. The antenna comprises two unit radiation patches, a dielectric layer and a metal floor layer, the two unit radiation patches are respectively printed on the upper surface of the dielectric layer, and the two unit radiation patches are symmetrical about the symmetry axis; the metal floor layer is arranged below the dielectric layer; each unit radiation patch is composed of an L-shaped parasitic structure and a quasi-hexagonal radiation patch; a defected ground (DGS) structure and an improved T-shaped isolation branch knot are etched on the metal floor layer; unification of bandwidth, miniaturization and high isolation is achieved, the impedance bandwidth is 3.8-13.2 GHz, the overall isolation degree is larger than 21 dB, the return loss is larger than 12 dB, the impedance bandwidth, the overall isolation degree and the return loss are all superior to basic requirements and indexes