快速设计的混合机制 metasurface 随机编码的太赫兹双频段 RCS 减少
Optics express
|September 15, 2023
概括
这项研究引入了一种新的混合机制元表面 (HMM),使用1位随机编码来有效地减少极化不敏感的双宽带雷达截面 (RCS). 设计的超表面显著减少了单静态和双静态RCS在广泛的事件角度和频率.
科学领域:
- 电磁学和元材料的使用
- 应用物理 应用物理
- 计算电磁学 计算机电磁学
背景情况:
- 超表面提供了对电磁波的先进控制.
- 实现宽带和极化不敏感的雷达截面 (RCS) 减小仍然是一个挑战.
- 混合机制超表面 (HMMs) 为复杂的电磁功能提供了一个平台.
研究的目的:
- 提出一种新的混合机制 (HMM),用于极化不敏感和双宽带RCS减少.
- 调查1位随机编码在增强散射扩散方面的有效性.
- 在单静态和双静态场景中优化元表面设计,以实现广角性能.
主要方法:
- 使用多目标粒子群优化 (MOPSO) 和Python-CST共模拟设计一种异型单元细胞.
- 使用单元格及其镜像版本 ('0'和 '1') 实现1位随机编码.
- 优化阵列分布以在各种事件条件下进行扩散式散射.
主要成果:
- 拟议的编码HMM在双频段实现了超过10dB的RCS降低:2.073.02 THz和3.784.71 THz.
- 对于 TE 和 TM 两种极化,有效的 RCS 减小在直角撞击角度保持到 45°.
- 在单静态和双静态配置中证明了极化不敏感和双宽带性能.
结论:
- 一位随机编码HMM是一种可行的方法,可以实现显著的双宽带RCS减少.
- 超表面在广泛的频率,极化和事件角度中表现出强大的性能.
- 这项技术有望在太赫兹频率的先进隐形应用中发挥作用.
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