Dual-Polarized Broad-Beam Reflective Metasurface with Combined Diffraction Gratings for 5G Millimeter Wave Application at 28 GHz

This paper presents a design of dual-polarized broad-beam reflective metasurface (MS) for 5G mmWave application at 28 GHz. Its broad-beam operation is simply realized by combining multiple MS sections with having different diffraction grating periods for different reflection angles. In the demonstration, the MS structure is designed by three sub-design sections that generate different reflection angles of 50°, 60°, and 70° under the identical normal incident angle. From the obtained results, the proposed MS can provide broad reflection beam from 45°-65° under both vertical- and horizontal-polarized incident waves.