电磁吸波与极化转换融合型超表面设计
Design of metasurface based on combination of electromagnetic absorption and polarization conversion
贺云 1刘鹏成 1付琴 1张芝铭 1匡元海 2曹昭旺3
作者信息
- 1. 武汉理工大学 信息工程学院,武汉 430070
- 2. 江苏海天微电子股份有限公司,江苏 镇江 212000
- 3. 华中科技大学 光学与电子信息学院,武汉 430074
- 折叠
摘要
针对微波信号多频带吸收与雷达通信信号兼容性的应用需求,利用人工电磁超表面极大设计自由度的特点,结合电磁吸收和极化转换2种电磁波调控机理,设计了一种多阵列单元融合型超表面结构.采用HFSS电磁仿真软件对超表面的电磁吸收性能和极化转换性能进行仿真,并分析其综合调控机理及宽带吸波特性,提出一种将"工"字开口环极化转换超表面阵列单元引入电阻加载的交叉偶极子超表面单元中的设计方法.融合偶极子超表面在低频段的电磁吸波特性以及"工"字开口环超表面在高频段的电磁极化转换特性,扩展超表面结构的电磁吸波带宽.研究结果表明:超表面结构的吸波范围可覆盖2.08～8.36 GHz和13.32～18.46 GHz双频带,多调控机理融合型电磁超表面设计方法具有可行性.
Abstract
To suit the application requirements of multi-band absorption of microwave signals and radar communication signal compatibility, a multi-array unit fusion metasurface structure is designed by combining the electromagnetic wave regulation mechanism of absorption and polarization conversion. The electromagnetic absorption and polarization conversion performance of metasurface is simulated by using HFSS electromagnetic simulation software, and its comprehensive regulation mechanism are analyzed. A design method is proposed to add the open-loop polarization conversion metasurface array unit into the cross dipole metasurface unit with resistance loading. The electromagnetic wave absorbing properties of dipole metasurface in low frequency band and the electromagnetic polarization conversion characteristics of open-loop metasurface in high frequency band are integrated by this method. The simulation of the reflectivity of the metasurface structure and the physical image analysis of the surface induced current illustrate the working mechanism of the two metasurface elements in different frequency bands. The results show that the absorption range of the metasurface structure covers the dual bands of 2. 08 ～8. 36 GHz and 13. 32 ～18. 46 GHz, which proves the feasibility of the multi-control mechanism fusion electromagnetic metasurface design method.
关键词
超表面/电磁吸收/极化转换/宽频带/反射系数Key words
metasurface/electromagnetic absorption/polarization conversion/broadband/reflection coefficient引用本文复制引用
基金项目
国家自然科学基金项目(62301227)
湖北省自然科学基金项目(2022CFB963)
武汉市知识创新专项-曙光计划项目(2023010201020316)
出版年
2024
国家科技期刊平台
NSTL
万方数据