Multifunctional Intelligent Reflective Surface by Continuously Controlling Amplitude and Phase

초록

An Intelligent Reflective Surface (IRS) has the capability to dynamically control and continuously tune its functionality, making it essential for a wide range of applications in wireless communication systems. However, designing a multifunctional IRS that can independently control both amplitude and phase has been a challenge. We propose a novel approach utilizing two independent control varactor diodes and a lumped resistor in each unit cell, allowing for manipulation of local field interactions and achieving these functionalities. We demonstrate various functionalities, including reflection, absorption, and dual- and single-beam steering with amplitude control. This approach could be an improvement over previous IRS designs, which could only control phase and change beam direction. With the ability to control both amplitude and phase, we believe that it could achieve more additional functionality. © 2023 IEEE.