Independent Manipulation of Reflection Amplitude and Phase by a Single‐Layer Reconfigurable Metasurface

Abstract Reconfigurable metasurfaces have attracted much attention in recent years due to their flexible capabilities of manipulating electromagnetic (EM) waves. However, most of the existing reconfigurable metasurfaces can only modulate either phase or magnitude, severely limiting the scope of their applications. Here, a novel metasurface is proposed that can simultaneously realize dynamic manipulation of reflection magnitude and phase. Such a metasurface is composed of periodic array of a single‐layer metallic structure loaded with two kinds of PIN diodes. By switching the state of one kind of PIN diodes, the 180° reflection phase difference can be obtained, meanwhile, the corresponding magnitude can be dynamically tuned at each phase state by changing the resistance of the other kind of PIN diodes. Compared with previously reported phase coding metasurface, the metasurface can not only control the directions of scattering beams, but also realize the tunable scattering intensity. In addition, it still can generate multibeam radiation with controllable power intensity and different beam number. The above versatile EM functionalities are demonstrated by full‐wave numerical simulation and experimental measurement at microwave frequencies. This study may pave a way to design smart materials and devices for multifunctional EM‐wave manipulation.