Metasurface-Based Circular Polarization Conversion for a Patch Antenna at 5.8 GHz

This paper presents the design of a circularly polarized antenna system operating at 5.8 GHz. The objective is achieved by designing a linearly polarized patch antenna integrated with a metasurface, which functions as a polarization converter. The considered metasurface converts part of the incident wave on it into the orthogonally polarized scattered field. The combination of the patch antenna and the metasurface resulted in circular polarization with a realized gain of 5.1 dBi. The distance between the antenna and the metasurface was optimized to provide the required phase shift for the effective realization of circular polarization.