陈克,,
郑依琳,
徐之源,
王健,
赵俊明,
冯一军,
南京大学电子科学与工程学院 南京 210023
基金项目:国家重点研发计划(2017YFA0700201)，国家自然科学基金(91963128, 62071215, 61801207, 61731010)，江苏高校优势学科建设工程项目，中央高校基本科研基金
详细信息
作者简介:胡琪：胡 琪，女，南京大学电子科学与工程学院在读博士生，主要研究方向为时变调制超构表面和全空间超构表面及其在波束调控中的应用。E-mail: hqahq1111@126.com
陈克：陈 克，男，博士，南京大学电子科学与工程学院副教授，主要研究方向为人工电磁材料及其在电磁吸波、波束形成、成像、天线设计等中的应用。E-mail: ke.chen@nju.edu.cn
郑依琳，女，南京大学电子科学与工程学院在读博士生，主要研究方向为超构表面在波束调控、无线通信中的应用。E-mail: Zylecho@126.com
赵俊明，男，博士，南京大学电子科学与工程学院教授，博士生导师，主要研究方向为电磁超构材料与电磁超构表面及其在微波段的应用。E-mail: jmzhao@nju.edu.cn
冯一军，男，博士，南京大学电子科学与工程学院教授，博士生导师，主要研究方向为人工电磁材料设计及其在光电子器件中的应用、微波射频器件及其在无线通信技术中的应用以及天线与电磁波传播。E-mail: yjfeng@nju.edu.cn
通讯作者:陈克 ke.chen@nju.edu.cn
冯一军 yjfeng@nju.edu.cn
责任主编：李廉林 Corresponding Editor: LI Lianlin中图分类号:TN925
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出版历程
收稿日期:2021-04-05
修回日期:2021-04-17
网络出版日期:2021-04-25
Time-varying Polarization-converting Programmable Metasurface and Its Application in Wireless Communication System
HU Qi,CHEN Ke,,
ZHENG Yilin,
XU Zhiyuan,
WANG Jian,
ZHAO Junming,
FENG Yijun,
School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
Funds:The National Key Research and Development Program of China (2017YFA0700201), The National Natural Science Foundation of China (91963128, 62071215, 61801207, 61731010), The Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, The Fundamental Research Funds for the Central Universities and Jiangsu Provincial Key Laboratory of Advanced Manipulating Technique of Electromagnetic Wave
More Information
Corresponding author:CHEN Ke, ke.chen@nju.edu.cn;FENG Yijun, yjfeng@nju.edu.cn
摘要
摘要:该文提出了一种时变极化编码超构表面的设计方法，实现了对电磁波基波与谐波分布的非线性调控。通过加载开关二极管的方式，超构表面可在2.4 GHz频率处实现转极化与同极化反射之间的动态切换，进而通过调节时域方波调制信号的占空比和频率，可在频域内调控电磁波基波与谐波的能量分配及频率偏移。在此基础上，利用超构表面的动态电磁响应，构建了基于二进制幅度调制方式的超构表面无线通信系统，实现对传输信息的直接调制和实时传输，其中该无线通信系统的最高传输码率可达625 kbps。所有实验结果均与理论计算吻合良好。该文所提出的设计方法在下一代通信、高分辨率成像等实际应用中具有良好的发展前景。
关键词:时变超构表面/
极化调控/
幅度调制/
无线通信/
非线性调制
Abstract:We propose a general scheme to manipulate fundamental and harmonic frequencies simultaneously in a nonlinear fashion based on time-varying polarization-converting programmable metasurface. Co-polarization and cross-polarization reflection can be switched dynamically at an operating frequency of 2.4 GHz by loading metasurface with PIN (p-i-n) diodes. As a result, by adjusting a duty cycle and frequency of square-wave-type time-varying signals used for time-varying modulation, energy distribution and frequency shift in the frequency domain can be manipulated. To verify this, we fabricated a sample and conducted experiments, and the results agreed well with the theoretical prediction, confirming the design principle. Furthermore, we propose a wireless communication system based on binary amplitude-shift keying as an example of its practical application. The proposed one eliminates the need for complex device components on the emitter because the information is directly modulated onto the metasurface, greatly simplifying the traditional system. The proposed system can achieve a maximum transmission data rate of up to 625 kbps in experiments. The proposed metasurface paves a new way for time-varying manipulation of microwave and can have potential in real-world applications, such as next-generation communication and high-resolution imaging.
Key words:Time-varying metasurface/
Polarization-converting/
Amplitude modulation/
Wireless communication/
Non-linear modulation
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