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Multi-Functional Reconfigurable Intelligent Surfaces for Enhanced Sensing and Communication.

Khushboo Singh¹, Mondeep Saikia², Karthick Thiyagarajan³

¹School of Electrical and Data Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.

Sensors (Basel, Switzerland)

|October 28, 2023

Summary

We developed a reconfigurable intelligent surface (RIS) that dynamically controls electromagnetic waves for enhanced wireless communication. This intelligent surface technology improves signal redirection and enables joint sensing and communication functions.

Keywords:

beam-steering intelligent reflecting surfaces localization metamaterials metasurface radar radar cross section reconfigurable intelligent surfaces wireless sensors

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Area of Science:

Electromagnetics and Wave Propagation
Wireless Communication Systems
Metamaterials and Intelligent Surfaces

Background:

Wireless communication systems face challenges with signal obstruction and channel disturbances.
Reconfigurable Intelligent Surfaces (RIS) offer a novel approach to intelligently manipulate radio frequency (RF) environments.
Existing solutions lack dynamic control over signal transmission, reflection, and polarization.

Purpose of the Study:

To propose and design a novel reconfigurable intelligent surface (RIS) with real-time phase-switching capabilities.
To demonstrate the RIS's ability to achieve dual-beam or quad-beam formation and polarization conversion.
To validate the RIS for enhanced wireless communication and joint sensing-communication applications.

Main Methods:

Analysis of the scattering performance of a reconfigurable unit element incorporating two p-i-n diodes.
Design and full-wave electromagnetic simulation of the reconfigurable intelligent surface (RIS).
Practical implementation and free-space measurement of a prototype RIS to examine scattering properties.

Main Results:

The designed RIS demonstrated dynamic field scattering manipulation, realizing six distinct functions.
Simulations validated the RIS's capability for real-time transmission and reflection phase switching.
Experimental measurements of the prototype's transmission and reflection coefficients closely matched simulation predictions.

Conclusions:

The proposed reconfigurable intelligent surface (RIS) effectively controls electromagnetic wave propagation for enhanced wireless connectivity.
The RIS technology enables the creation of intelligent radio environments, improving signal robustness.
The developed RIS shows promise for future wireless sensor networks, facilitating joint detection and communication.