基于非线性电路的双频带脉冲波选择性超表面吸收器设计  

Design of a Dual-Band Pulse Wave Selective Metasurface Absorber Based on Nonlinear Circuits

作　　者：钱莹洁 刘海宏 程用志[1,3,4] 罗辉 陈浮 李享成 QIAN Ying-jie;LIU Hai-hong;CHENG Yong-zhi;LUO hui;CHEN Fu;LI Xiang-cheng(School of Information Science and Engineering,Wuhan University of Science and Technology,Wuhan,Hubei 430081,China;State Key Laboratory of Refractory Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan,Hubei 430081,China;Key Laboratory of High Temperature Electromagnetic Materials and Structure of MOE,Wuhan University of Science and Technology,Wuhan,Hubei 430081,China;Hubei Longzhong Laboratory,Xiangyang,Hubei 441000,China)

机构地区：[1]武汉科技大学信息科学与工程学院,湖北武汉430081 [2]武汉科技大学耐火材料与冶金国家重点实验室,湖北武汉430081 [3]武汉科技大学高温电磁材料与结构教育部重点实验室,湖北武汉430081 [4]湖北隆中实验室,湖北襄阳441000

出　　处：《电子学报》2024年第6期2067-2073,共7页Acta Electronica Sinica

基　　金：国家自然科学基金(No.52304410,No.51972242);湖北省自然科学基金创新群体项目(No.2020CFA038);湖北省重点研发项目(No.2020BAA028);湖北省重大项目(功能性涂层材料,No.2023BAA003);湖北省青年拔尖人才培养计划。

摘　　要：本文提出一种基于非线性电路的双频带脉冲波形选择性超表面吸波器(MetaSurface Absorber,MSA).设计的双频带MSA单元结构由放置在同一平面上两个形状相同但线宽不同且集成二极管与电阻电容并联的非线性电路的金属方环形谐振器、中间介质层以及金属接地面构成.仿真结果表明,在-20~10 dBm功率范围内,双频带MSA随功率的增加对短脉冲波吸收率先增大再减小.当功率为-5 dBm时,设计的双频带MSA对脉冲波吸收率在3.2 GHz和4.1 GHz分别可达97%和92%,连续波吸收率只有28%和39%.另外,MSA吸收率随脉冲宽度的增大逐渐减小.进一步研究表明,该双频带MSA在功率为-5 dBm的TE模和TM模脉冲波,斜入射角为0°~60°范围内吸收率超过70%.还研究了非线性电路中电阻、电容参数对设计的MSA脉冲波和连续波吸收率的影响.本文所提出的双频带脉冲波选择性MSA显示了其在无线通信以及抗电磁干扰领域具有潜在的应用前景.In this paper,a dual-band metasurface absorber(MSA)based on nonlinear circuits that can selectively absorb pulse wave in the same frequencies is proposed.The unit-cell of the designed dual-band MSA consists of two metal square-ring shaped resonators with the same shape but different wire width,the middle dielectric layer and the metal ground plane.The simulation results show that the absorptance of the dual-band MSA increases firstly and then decreases with the increase of the input power at-20~10 dBm.When the power is at-5 dBm,the absorptance of the designed dual-band MSA of the pulse wave reaches 97%and 92%at 3.2 GHz and 4.1 GHz,respectively,and that of the continuous wave is only 28%and 39%.In addition,the absorptance of the MSA decreases with the increase of pulse width.Further,simulated results indicate that the dual-band MSA can absorb more than 70%of pulse wave with an input power of-5 dBm at a wide incident angle of 0°~60°for both TE and TM mode.The effects of resistance,capacitance on the absorptance of the nonlinear circuit MSA for the incident pulse and continuous wave are also studied.The proposed dual-band waveform selective MSA shows a potential prospect in the fields of wireless communication and anti-electromagnetic interference.

关 键 词：超表面 非线性 波形选择性 双频带 脉冲波 连续波 

分 类 号：TN95[电子电信—信号与信息处理] TB34[电子电信—信息与通信工程]