An antenna and an electronic device are provided. The antenna includes a first substrate, a second substrate, a dielectric layer, a ground layer and a radiation layer. The second substrate faces to the first substrate. The dielectric layer is between the first substrate and the second substrate. The ground layer is on a first surface of the first substrate. The radiation layer is on a second surface of the second substrate, and the second surface of the second substrate and the first surface of the first substrate face each other. The ground layer and the radiation layer each include a wire grid polarizer structure.