Sub-Thz Multibeams Shaping Metasurface Based on Circular Polarization Decoupled Meta-Atom

With the advent of the 5G era, the rapid depletion of spectrum resources has led researchers to focus on multifunctional devices operating in the millimeter-wave range. On the other hand, circular polarization also attracts considerable attention due to its unique advantages. To this end, this study proposes a shared aperture metasurface based on a circular polarization decoupled metasurface. By controlling both the circular polarization state of the transmitted wave and the linear polarization state of the incident wave, this metasurface allows independent control of four circularly polarized beams, enabling a variety of novel functions. To validate the feasibility of this approach, a metasurface was designed to deflect four beams with a center frequency of 110 GHz and a fractional bandwidth of 18.2%. Simulation results show excellent performance, in line with expectations.