Yin Chen, Chen Yuzhen, Wang Xiaoyi, Yang Guo-Min
Opt Express. 2025 Mar 24;33(6):12890-12900. doi: 10.1364/OE.558678.
This paper introduces a novel design for a miniaturized 2-bit reconfigurable metasurface featuring a phase-shifting integrated structure. The design strategically locates the phase-shifting network beneath the metasurface element, enabling a decoupled architecture that separates the radiation and phase-shifting functionalities, which significantly reduces the design complexity. The 2-bit reconfigurable metasurface incorporates a meander line configuration, significantly enhancing space utilization by reducing the overall volume of the metasurface element. Operating within the 4.75 GHz to 5.75 GHz frequency range, the metasurface achieves element state reconfiguration through the on-off switching of PIN diodes. A field-programmable gate array (FPGA) platform is employed to provide precise bias voltages to the diodes, enabling dynamic control of each element of the metasurface. The 2-bit design supports four distinct phase states, with a 90° phase difference between adjacent states, facilitating advanced functionalities such as beam deflection and radar cross-section (RCS) reduction. Both simulation and experimental results demonstrate the metasurface's effectiveness in controlling electromagnetic wave deflection and diffusion, validating its potential for applications in wavefront manipulation and stealth technologies.
本文介绍了一种具有移相集成结构的小型化2位可重构超表面的新颖设计。该设计将移相网络战略性地置于超表面元件下方，实现了一种将辐射和移相功能分离的解耦架构，这显著降低了设计复杂性。2位可重构超表面采用了曲折线配置，通过减小超表面元件的总体积，显著提高了空间利用率。该超表面在4.75吉赫兹至5.75吉赫兹频率范围内工作，通过PIN二极管的通断切换实现元件状态重构。采用现场可编程门阵列（FPGA）平台为二极管提供精确的偏置电压，从而能够动态控制超表面的每个元件。2位设计支持四种不同的相位状态，相邻状态之间存在90°的相位差，便于实现诸如波束偏转和雷达散射截面（RCS）减小等先进功能。仿真和实验结果均证明了该超表面在控制电磁波偏转和扩散方面的有效性，验证了其在波前操纵和隐身技术中的应用潜力。
