A Numerically Efficient Technique for the Analysis of Metamaterial- and Metasurface-based Antennas

Abstract

Metasurface-based antennas have received considerable recent attention because they are not only useful for designing new antennas, but for improving the performance of legacy design as well. However, these antennas are usually multiscale in nature and they typically require an inordinately long time when simulated by using commercial solvers. In this work, we present a new approach for analyzing antennas that utilize Metasurfaces (MTSs) and Metamaterial (MTMs). The proposed method departs from the widely used technique based on an anisotropic impedance representation of the surface and relies on an equivalent medium approach instead. The principal advantage of this approach is that such an equivalent medium representation can be conveniently used in commercial EM solvers. Several illustrative examples are presented in the paper to demonstrate the efficacy of the present approach when simulating MTS- and MTM-based antennas.