Antenna, dual-polarized antenna and MIMO antenna

The antenna comprises a dielectric substrate, the dielectric substrate is provided with a first surface and a second surface which are oppositely arranged, the first surface of the dielectric substrate is provided with a first microstrip feed unit and a first out-of-roundness balance unit, and the second surface of the dielectric substrate is provided with a second microstrip feed unit and a second out-of-roundness balance unit; the first microstrip feed unit and the first out-of-roundness balance unit are oppositely arranged; the second surface of the dielectric substrate is provided with a second microstrip feed unit and a second out-of-roundness balance unit, and the second microstrip feed unit and the second out-of-roundness balance unit are oppositely arranged. 本实用新型公开了一种天线、双极化天线、MIMO天线，其中，天线包括：介质基板，介质基板具有相对设置的第一面和第二面，其中，介质基板的第一面上设置有第一微带馈电单元和第一不圆度平衡单元，第一微带馈电单元和第一不圆度平衡单元相对设置；介质基板的第二面上设置有第二微带馈电单元和第二不圆度平衡单元，第二微带馈电单元和第二不圆度平衡单元相对设置。