A New Paradigm for Reconfigurable Intelligent Surface Design: Multi-port Network Method

TL;DR

This paper introduces a multi-port network method for reconfigurable intelligent surface design, improving modeling accuracy, reducing reliance on electromagnetic simulations, and shortening design time for complex structures.

Contribution

It presents a novel multi-port network approach that enhances RIS element modeling accuracy and efficiency compared to existing methods.

Findings

Improved modeling accuracy for complex RIS structures.

Reduced dependence on full-wave electromagnetic simulations.

Shortened design time for RIS elements.

Abstract

As a novel approach to flexibly adjust the wireless environment, reconfigurable intelligent surfaces (RIS) have shown significant application potential across various domains, including wireless communication, radar detection, and the Internet of Things. Currently, mainstream design methods for reconfigurable intelligent surfaces face inherent limitations. For instance, while the full-wave electromagnetic (EM) simulation method offers strong universality, it suffers from low efficiency. Machine learning-based methods can effectively reduce design time but are heavily dependent on full-wave EM simulations. Although the design methods based on the equivalent circuit can lessen the reliance on full-wave EM simulations, they still struggle with insufficient model accuracy when dealing with complex element structures. In recent years, a new multi-port network method has been introduced to RIS design. This method has significantly enhanced the accuracy of modeling complex structures. It reduces the dependency on full-wave EM simulations and substantially shortens the design time. This work provides a detailed exploration of the RIS element design strategy based on multi-port network and discusses future development trends in this field.