Path-Loss and Control Voltage Response Modeling for Reconfigurable-Intelligent-Surface Empowered Wireless Communications System

Abstract

This paper presents experimental work on modeling the path-loss and control voltage response for reconfigurable intelligent surfaces (RIS)-empowered wireless communication systems. The study investigates the impact of RIS on the performance of wireless networks by focusing on how varying control voltages influence the phase shift of RIS unit cells and subsequently affect signal propagation. Through a series of controlled experiments, the relationship between path-loss exponents and RIS parameters, such as reflection coefficients and incident angle sensitivities, is explored. The experimental results highlight that RIS can significantly enhance signal strength and reduce path-loss under optimal conditions. Additionally, the control voltage response of the RIS is found to be sensitive to variations in the incident angle, which can affect the channel reciprocity. These findings contribute to the development of more efficient RIS designs for future wireless communication systems, providing valuable insights for optimizing performance in real-world scenarios.