Linear-to-Circular Polarization Converter Based on Four-Arms Star FSS at 5.2 GHz for 5G Applications

A single-layer frequency selective surface (FSS) polarizer is proposed as a linear-to-circular polarization converter, operating at 5.2 GHz for 5G applications. The analyses are based on the magnitude and phase of the transmission coefficient of two orthogonal electric field components. The four-arms star geometry used in the FSS polarizer is simple to design, and equations are provided. The design approach is validated by a good agreement between numerical and measured results.