宽带RCS缩减与高效透波一体的多功能编码超表面设计  

Design of A Multi-functional Coding Metasurface with Integrated Broadband Radar Cross Section Reduction and High-efficiency Transmission

作　　者：傅宇峰 王晨 陈平[1] FU Yufeng;WANG Chen;CHEN Ping(School of Electronic and Engineering,Nanjing University,Nanjing 210093,China)

机构地区：[1]南京大学电子科学与工程学院,江苏南京210093

出　　处：《无线电工程》2022年第2期209-215,共7页Radio Engineering

基　　金：国家自然科学基金项目(62171215)。

摘　　要：提出了一种基于电路相位实现的具有宽带低散射特征和低频传输特性的多功能编码超表面。该超表面上层采用各向同性结构,通过调整几何参数得到2个在高频处为全反射,且反射系数相位差在180°±37°范围内的单元结构,同时,这2个单元在低频都表现为透波特性;下层的频选结构在低频透波窗口频率处具有宽带的带通响应,带外则表现为反射特性。多层结构的超表面单元实现了高频的宽带RCS缩减和低频的高效传输特性。仿真结果表明,该设计在6.51~17.22 GHz具有小于-10 dB的RCS缩减,并且在2.86~3.82 GHz有插损小于1 dB的传输窗口。制备了样品并进行实验验证,实验结果与仿真具有一致性。A multi-functional coding metasurface with broadband low-scattering characteristics and low-frequency transmission based on circuit phase is proposed.The upper layer of the metasurface adopts an isotropic pattern.By adjusting the geometric parameters,two elements are obtained which are total reflection at high frequency and the phase differences are 180°±37°at low-frequency.The two elements are characterized by transmission at low frequency.The frequency-selective structure of the lower layer has a broadband band-pass response at the frequency of the low-frequency transmission window,while the out-of-band performance is reflective.The multilayer metasurface elements are designed to achieve broadband RCS reduction at and high efficiency transmission at low frequency.The simulation results show that the RCS reduction is less than-10 dB at 6.51~17.22 GHz,and the insertion loss of the transmission window is less than 1 dB at 2.86~3.82 GHz.The samples are prepared and verified by experiments.The performances of proposed metasurface were verified experimentally with great consistent with the simulation results.

关 键 词：电路相位 雷达散射截面缩减 漫散射-传输 编码超表面 

分 类 号：TN710[电子电信—电路与系统]