Abstract:In this paper, a dual-band and reflective polarization converter based on metasurface is proposed. Its unit cell is composed of two layers of metal plates separated by a dielectric substrate. The simulation results show that the proposed converter is able to convert x- or y-polarized incident waves into cross-polarized waves perfectly in frequency bands of 6.75-10.59 GHz and 17.78-19.61GHz,and the polarization conversion ratio is nearly 100%, which can also convert the linearly polarized waves into circularly polarized waves. It’s rarely to realize polarization conversion simultaneously, which can be widely used in radar satellites, antenna design and telecommunication applications.