Current-Only Metasurface Design with Cell-Level Granularity

This paper proposes an algorithm for the design of metasurface antennas which is based on a current-only optimization, and a partitioning of the surface in small, electrically isolated cells that effectively model the macroscopic behaviour of constituent unit cells and the coupling between them. This procedure is applied to the design of circular metasurface antennas. Two types of cells are considered, with square and hexagonal shape. The synthesized impedance profile and the resulting radiation pattern are comparable and are in agreement with continuous current designs.