Design and analysis of dual-polarized reflectarray with low sidelobe level for wireless communication applications

Abstract

A reflectarray with upper sidelobe level (SLL) suppression is proposed for the fifth generation (5G) wireless communications in this letter. A unit cell of the reflectarray is composed of a crossed-dipole element to realize dual-polarized operation. In order to validate the improvement of upper SLL, a 45 degree-beam-steering reflectarray, comprising 20×10 elements, operating at 28GHz for quasi-millimeter-wave applications is designed and analyzed numerically. Simulation results demonstrate that the worst value of all upper SLL in radiation pattern of the reflectarray is reduced by about 10dB as compared to that in previous design.