An Innovative Metasurface Polarizer Working in 5G Frequency Bands

The research introduces an innovative metasurface design to provide multi-band capabilities for both cross-polarization and circular polarization. The metasurface consists of unit cells based on a ring-shaped configuration with a star inside. It is designed on a substrate made of Roger 5880. The thickness of this substrate is 1.575 mm, and the loss tangent is 0.009. The design acts like an efficient cross-polarizer, attaining a fractional bandwidth of 66% within the frequency bands spanning 23.24-34.64 GHz and 36.68-41.12 GHz. Additionally, this design functions as a circular polarizer in the frequency bands of 11.76-13 GHz, 19.43-21.6 GHz, 35.94-36.58 GHz, and 41.28-42.28 GHz.