GO/PO With Surface Susceptibility Model for Multiple Scattering Analysis of Targets Involving Metasurfaces

This study introduces an approach to analyzing multiple scattering of targets involving realistic metasurfaces. The method utilizes the surface susceptibility model (SSM), a parametric model of metasurfaces, in conjunction with geometrical optics (GO) and physical optics (PO). The study showcases that through the utilization of this technique, targets comprised of metasurfaces can be accurately and efficiently analyzed on standard computers. This level of precision and efficiency is challenging to achieve with traditional GO/PO and brute-force analysis methods, making this approach particularly beneficial for large systems where metasurfaces are a component of the scattering analysis. To test the accuracy, flexibility, and performance in scenarios involving multiscattering, a uniform array, a gradient array, and a dihedral corner reflector constructed from two metasurface arrays are evaluated. The results are validated using commercial software for both the s (or TE) and p (or TM) polarization, confirming the high efficiency and flexibility of the proposed method.