A wideband 1-bit Reflective Metasurface Based on Linear Polarizer

This paper presents a novel wideband high-gain 1-bit reflective metasurface for 5G millimeter wave system. The metasurface unit cell is based on a wideband linear polarizer, which consists of a single-layer substrate with top polarization rotating patch (PRP) and bottom metallic ground. The proposed unit cell and its mirror image can maintain a stable 180° phase difference over a wide bandwidth of18–36 GHz. Thus, 1-bit phase quantization is obtained by using this property. Based on the linear polarizer, a single 1-bit reflectarray is designed and simulated. The simulated results show that focused pencil beam with high gain is successfully generated by the proposed metasurface and the maximum gain reaches to 21.62 dBi with 18.86% 1-dB gain bandwidth and 34.1% 3-dB gain bandwidth, respectively.