Multiport Network Modeling for Reconfigurable Intelligent Surfaces: Numerical Validation with a Full-Wave PEEC Simulator

TL;DR

This paper validates an analytical multiport network model for Reconfigurable Intelligent Surfaces (RIS) using a full-wave PEEC numerical method, confirming the model's effectiveness and the PEEC method's suitability for EM simulation of RIS in wireless links.

Contribution

The study provides the first comprehensive validation of a multiport network model for RIS using PEEC-based full-wave simulations, enhancing modeling accuracy for wireless communication design.

Findings

Good agreement between analytical and PEEC simulation results.

The multiport network model effectively represents RIS behavior.

PEEC method is suitable for electromagnetic modeling of RIS.

Abstract

Reconfigurable Intelligent Surface (RIS) modeling and optimization are a crucial steps in developing the next generation of wireless communications. To this aim, the availability of accurate electromagnetic (EM) models is of paramount important for the design of RIS-assisted communication links. In this work, we validate a widely-used analytical multiport network for RISs by means of a well-established full-wave numerical method based on the Partial Elements Equivalent Circuit (PEEC) approach. Numerical results show good agreement between the two methods, thus demonstrating i) the considered multiport network model being effective and ii) the PEEC method being appropriate for EM modeling of RIS-assisted wireless links.