A Broadband Linear to Circular Polarization Converter for 5G Millimeter Wave Communication

This paper presents a design and simulation of a subwavelenth polarization converter unit operating in 5G millimeter wave frequency. The converter consists of two metal metasurface patterns and a dielectric layer sandwiched by the two metasurfaces. Simulation shows that the converter owns more than 3 GHz bandwidth with axial ratio of circular polarization lower than 3 dB, insertion loss less than 1.5 dB, and VSWR lower than 2, which can adapt to the millimeter wave frequency band of 5G communication.