Neema K, Krishna Deepti Das
Department of Electronics, Center for Research in ElectroMagnetics and Antennas (CREMA), Cochin University of Science and Technology, Kochi, 682022, India.
Sci Rep. 2025 Jul 1;15(1):20475. doi: 10.1038/s41598-025-05245-0.
Multifunctional and reconfigurable metasurfaces are increasingly important as they facilitate the dynamic manipulation of electromagnetic waves, enabling adaptive responses to varying communication requirements and environmental conditions-a characteristic feature of 6G networks. This paper presents a design for a multifunctional reconfigurable metasurface that can convert linearly polarized (LP) electromagnetic waves to their orthogonal (OLP) counterparts in frequency band-1 (4.85 to 6.93 GHz) and to circularly polarized (CP) waves in frequency band-2 (8.3 to 9.3 GHz) with a relatively thinner substrate, broader reflection bandwidths and improved angular stability. The proposed metasurface unit cell, when loaded with PIN diodes, allows for switching between the multifunctional operations mentioned earlier and a simple reflection operation over the same frequency bands. The paper offers a theoretical explanation for the fundamental cause of this multifunctional and reconfigurable performance, and a sample prototype consisting of 17 times 17 unit cells is fabricated, measured, and verified against simulation results.
多功能且可重构的超表面变得越来越重要，因为它们有助于对电磁波进行动态操纵，能够对不断变化的通信需求和环境条件做出自适应响应——这是6G网络的一个特征。本文提出了一种多功能可重构超表面的设计，该超表面能够在频段1（4.85至6.93GHz）将线极化（LP）电磁波转换为其正交（OLP）波，并在频段2（8.3至9.3GHz）将其转换为圆极化（CP）波，同时具有相对更薄的基板、更宽的反射带宽和更高的角度稳定性。所提出的超表面单元在加载PIN二极管时，能够在上述多功能操作与相同频段上的简单反射操作之间进行切换。本文对这种多功能和可重构性能的根本原因给出了理论解释，并制作了一个由17×17个单元组成的样本原型，进行了测量，并与仿真结果进行了验证。
