کنفرانس مهندسی برق ایران

صفحه اصلی / سی و چهارمین کنفرانس بین المللی مهندسی برق

Analytical Modeling of Reflective Aperiodic Metasurfaces Using Effective Polarizability Tesnsors

نویسندگان :

Atena Shokouhi-Amiri¹ Mohammad Yazdi²

1- دانشگاه صنعتی نوشیروانی بابل، بابل، ایران 2- دانشگاه صنعتی نوشیروانی بابل، بابل، ایران

کلمات کلیدی :

Aperiodic metasurfaces،Polarizability Tensors،Surface currents،GSTC

چکیده :

This paper presents an analytical method for the analysis of reflective aperiodic metasurfaces based on the effective polarizability of their constituent unit cells. In contrast to conventional impedance-based and Generalized Sheet Transition Condition (GSTC) approaches, which rely on homogenization and often require full-wave optimization, the proposed method directly utilizes the polarizability distribution of the metasurface elements to compute the induced surface currents. By employing a transmission-line model in conjunction with the image theorem, closed-form expressions are derived for the surface current densities on both the metasurface layer and the ground plane. These currents are subsequently used to evaluate the total electric-field distribution in the near-field and far-field regions. The accuracy of the proposed approach is validated through comprehensive comparisons with an established impedance-based formulation and full-wave numerical simulations of a reflective aperiodic metasurface composed of discrete strip-inductor unit cells operating at 10 GHz. Excellent agreement is observed in the predicted surface current distributions, near-field electric-field maps, and far-field radiation patterns, with minor discrepancies attributed to modeling assumptions. The results demonstrate that the proposed polarizability-based framework provides an accurate and computationally efficient alternative for the analysis of aperiodic metasurfaces without requiring optimization-based design procedures.