Analysis of Huygens’ Metasurfaces for the Design of Transmit-Reflect Arrays

Abstract

In this article, we propose a rigorous approach to determine the surface parameters of Huygens’ metasurface cells for the design of high-efficiency transmit-reflect arrays. We demonstrate that the power of a normally incident plane wave can be evenly split into the transmitted and reflected ones, and that, at the same time, arbitrary phase shifts can be introduced on the scattered waves. As a proof of concept, four cells realizing a uniform 2-bit quantization of the phase range, in transmission and reflection, are designed. Each cell comprises two dielectric slabs and three impedance sheets which are derived from the optimal surface parameters. Moreover, the bandwidth performance are preliminarily assessed.