The present disclosure provides an antenna, a method for manufacturing an antenna and an antenna system. The antenna according to the present disclosure includes: a dielectric layer having a first surface and a second surface which are oppositely disposed along a thickness direction of the dielectric layer; a radiation patch disposed on the first surface of the dielectric layer; and a reference electrode layer disposed on the second surface of the dielectric layer and having an orthographic projection on the second surface at least partially overlapping an orthographic projection of the radiation patch on the second surface. The reference electrode layer has an opening penetrating therethrough along a thickness direction of the reference electrode layer, and an orthographic projection of at least a part of a radiation edge of the radiation patch on the first surface is located within an orthographic projection of the opening on the first surface.