Frequency Selective Reflection of Wideband Signals with Reconfigurable Intelligent Surfaces

TL;DR

This paper proposes a reconfigurable intelligent surface (RIS) configuration method that enables frequency selective reflection of wideband signals, addressing bandwidth restrictions crucial for next-generation wireless communication systems.

Contribution

The paper introduces a novel RIS configuration technique that achieves frequency selective reflection, enhancing the control over wideband signals in wireless environments.

Findings

Demonstrates effective frequency selectivity in RIS reflection

Addresses bandwidth limitations in RIS design

Improves signal control for next-generation systems

Abstract

Recently, the reconfigurable intelligent surface (RIS) technology has ushered in the prospect of control over the wireless propagation environment. By establishing alternative propagation paths for the transmitted signals, and by reflecting them in a controllable manner, the RIS is able to improve the signal reception. However, an aspect often overlooked is the potential bandwidth restrictions on the wideband signal reflected by the RIS. If not carefully considered, this can become an impediment for the adoption of the RIS in the next generation of communications systems. Therefore, in this work we propose a RIS configuration method that provides frequency selective signal reflection for wideband signals.