Wang Gang, Li Dawei, Liao Wenhe, Liu Tingting, Li Xiangjia, An Qing, Qu Zhi
School of Mechanical Engineering (SME), Nanjing University of Science and Technology (NJUST), 200 Xiao Ling Wei Road, Nanjing, 210094, China.
Department of Aerospace and Mechanical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, 501 E. Tyler Mall, Tempe, AZ, 85287, USA.
Adv Mater. 2024 Oct;36(40):e2408216. doi: 10.1002/adma.202408216. Epub 2024 Aug 23.
The rapid development of radar detection systems has led to an increased sensitivity to the electromagnetic (EM) scattering properties of detected targets. Flexible and adaptable EM scattering properties significantly enhance the survivability of battlefield weapons. This paper presents the design of a novel multifunctional metamaterial with reconfigurable EM scattering properties based on a bistable curved beam. In addition to the cushioning and energy absorption properties of curved beams, the metamaterial achieves more than 90% EM absorption in the frequency range of 2.17-17.31 GHz, with a relative thickness of only 0.09λ. The bistable nature of the metamaterial allows it to switch between different states. Moreover, combined with the digital coding, this metamaterial can continuously adjust the absorbing bandwidth and further enhance the EM absorption rate within a specific frequency band range. If applied to satellite configurations, the developed metamaterial significantly reduces the radar cross section and offers potential applications in reconfiguring EM scattering properties, when applied to satellite configurations. By actively controller and reconstructing the EM scattering properties at certain frequency points, the metamaterial can achieve camouflage, providing innovative solutions for future stealth technology, electronic countermeasures, and deception jamming in radar detection.
雷达探测系统的快速发展使得对被探测目标的电磁（EM）散射特性的敏感度提高。灵活且可适应的EM散射特性显著增强了战场武器的生存能力。本文提出了一种基于双稳态弯曲梁的具有可重构EM散射特性的新型多功能超材料的设计。除了弯曲梁的缓冲和能量吸收特性外，该超材料在2.17 - 17.31 GHz频率范围内实现了超过90%的EM吸收，相对厚度仅为0.09λ。超材料的双稳态特性使其能够在不同状态之间切换。此外，结合数字编码，这种超材料可以连续调整吸收带宽，并在特定频段范围内进一步提高EM吸收率。如果应用于卫星结构，所开发的超材料可显著减小雷达散射截面，并在应用于卫星结构时为重新配置EM散射特性提供潜在应用。通过在某些频率点主动控制和重构EM散射特性，该超材料可以实现伪装，为未来雷达探测中的隐身技术、电子对抗和欺骗干扰提供创新解决方案。
