Volume 10 Issue 2
Apr.  2021
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SHUANG Ya, LI Li, WANG Zhuo, et al. Controllable manipulation of Wi-Fi signals using tunable metasurface[J]. Journal of Radars, 2021, 10(2): 313–325. DOI: 10.12000/JR21012
Citation: SHUANG Ya, LI Li, WANG Zhuo, et al. Controllable manipulation of Wi-Fi signals using tunable metasurface[J]. Journal of Radars, 2021, 10(2): 313–325. DOI: 10.12000/JR21012
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Controllable Manipulation of Wi-Fi Signals Using Tunable Metasurface

doi: 10.12000/JR21012
  • 1.

    State Key Laboratory of Advanced Optical Communication Systems and Networks, Department of Electronics, Peking University, Beijing 100871, China

  • 2.

    Beijing Aerospace Measurement & Control Technology CO., LTD., Beijing 100871, China

Funds:  The National Key Research and Development Program of China (2017YFA0700203)
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  • Author Bio:

    SHUANG Ya, was born in 1993 in Shaanxi, China. She received the B.S. degree from Xidian University, Xi’an, China, in 2016. She is currently pursuing the Ph.D. degree with the Department of Electronics, Peking University, Beijing, China. Her current research interests include metasurface-assisted electromagnetic imaging system, communication system based on information metamaterials, and metasurface design.E-mail: 1601111240@pku.edu.cn

    WANG Zhuo, was born in 1995. He received his B.Eng and M.Eng degree in electronic and information engineering from the Xidian University. He is currently working toward the Ph.D. degree in Peking University. His research interest is intelligent electromagnetic sensing. E-mail: 2001111254@stu.pku.edu.cn

    WEI Menglin, was born in Sep 1995 in Shanxi, China. He received his bachelor’s degree from Department of Electronics, Peking University in 2018. He joined State Key Laboratory of Advanced Optical Communication Systems and Networks as a PhD student. He has interests in microwave imaging and reconfigurable intelligent metasurface.E-mail: wmlpku@pku.edu.cn

    LI Lianlin, was born in 1980. He received his Ph.D. degree from the Institute of Electronics, Chinese Academy of Sciences in 2006. He is currently a hundred talented program professor with Peking University. His research interests are super-resolution imaging, microwave imaging, sparse signal processing, and ultrawideband radar systems.E-mail: lianlin.li@pku.edu.cn

  • Corresponding author: LI Lianlin E-mail: lianlin.li@pku.edu.cn
  • Received Date: 2021-02-19
  • Rev Recd Date: 2021-04-02
    • Available Online: 2021-04-26
  • Publish Date: 2021-04-28
    Abstract
  • In this paper, we propose the utilization of a programmable metasurface for flexibly manipulating ambient Wi-Fi signals. First, we propose a new and efficient optimization algorithm CWGS (Complex Weighted Gerchberg-Saxton), which is based on an electromagnetic scattering model of the metasurface. The proposed algorithm quickly redesigns the complex amplitude distribution of the Wi-Fi field bounced off the programmable metasurface to enhance the Wi-Fi signals at desired locations significantly. Second, we fabricated a large-scale programmable metasurface that operates at the 2.4 GHz frequency band. We conducted several experiments using the fabricated metasurface to verify the proposed optimization algorithm’s feasibility and effectiveness. Both the theoretical and experimental results show that the programmable metasurface can dynamically boost Wi-Fi signals at multiple locations. Besides, we experimentally verified that using the developed strategy could improve the Wi-Fi signals by 23.5 dB. The results of our work improve the usability and practicality of the programmable metasurface in real-world applications and pave the way for wireless communications, future smart homes, and other applications.

     

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