Metasurface Dome Antennas with Non-Locality Compensation

Steerable antennas typically struggle to maintain optimal radiation performance at large scan angles. This field of view (FoV) limitation becomes critical for the implementation of efficient transmitters in reconfigurable intelligent surfaces (RIS) based networks. The inclusion of a static metasurface (MTS) dome in the antenna system has been previously proposed to increase the scan range. However, preceding investigations based the wide-angle matching on a predistortion calculated under the assumption of refraction locality. In this paper, we demonstrate that non-locality compensation provides an outperforming solution for the scan range expansion. Full-wave simulations are reported, demonstrating the enhanced performance of the metadome (MTD) system compared to the standalone antenna, as well as the superiority of the non-local approach over the compensation assuming locality.