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Switchable electromagnetic shield based on seawater

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Published/Copyright: September 6, 2021
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Frequenz
From the journal Frequenz Volume 76 Issue 3-4

Abstract

In this paper, we propose a concept of switchable electromagnetic shield based on seawater. The shield is designed to be a multilayer structure consisting of one chamber layer filled with free space or seawater and three dielectric layers to match with the communication wave signal. At low-power signal for communication purpose, the shield with the chamber layer filled with free space can make the wave signal transparently propagate through. At high-power interference microwave signal impinging onto the shield, the structure with the chamber layer filled with seawater can reflect and absorb the microwave energy. Transparency state for communication signal is designed based on the theory of transmission line, where a key indicator for communication signal transmission is the input impedance of the shield. Shielding state is theoretically calculated under different seawater parameters in a wide frequency band. Both the transparency and shielding states are validated by full-wave numerical calculations, and the results are in good agreement.

Keywords: impedance match; seawater; shielding effectiveness; switchable electromagnetic shield
Corresponding author: Shen-Yun Wang, Research Center of Applied Electromagnetics, Nanjing University of Information Science & Technology, Nanjing 210044, P. R. China, -mail: wangsy2006@126.com; and Bing-Xiang Li, College of Electronic and Optical Engineering and College of Microelectronics, Nanjing University of Posts and Telecommunications, 210023 Nanjing, P. R. China; and National Laboratory of Solid State Microstructures and College of Engineering and Applied Sciences, Nanjing University, 210093 Nanjing, P. R. China, E-mail:

Funding source: National Natural Science Foundation of China 10.13039/501100001809

Award Identifier / Grant number: 61302048

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This work was supported by the National Natural Science Foundation of China (Grant No. 61302048).

  3. Conflict of interest statement: The authors declare no competing financial interest.

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Received: 2021-05-01
Accepted: 2021-08-26
Published Online: 2021-09-06
Published in Print: 2022-04-26

© 2021 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. A planner Doherty power amplifier with harmonic suppression with open and short ended stubs
  4. Effect of moisture content on dielectric properties of banana leaves and peels in frequency range of 1–20 GHz
  5. Enhanced prompt trigger optical switching using nonlinear photonic crystal ring resonator for application on all-optical AND/NAND and OR/NOR logic function
  6. Switchable electromagnetic shield based on seawater
  7. Thermally switchable terahertz metasurface absorber composed of H-fractal and enabled by phase-change material of vanadium dioxide
  8. Sub-terahertz (THz) antenna for Internet of Things and 6G Communication
  9. An optimization of a reconfigurable CPW antenna for RF energy harvesting cognitive radio application
  10. Quintuple band circular monopole antenna with innovative 3-D printed PLA substrate for wireless applications
  11. A simple and compact broadband circularly polarized circular slot antenna for WLAN/WiMAX/DBS applications
  12. Design and Experimental Validation of Miniaturized Self-Triplexing Antenna Employing HMSIW
  13. Compact circular polarized CPW antenna for WLAN and biomedical applications
  14. Miniaturized frequency selective surface with high angular stability
https://doi.org/10.1515/freq-2021-0113
Keywords for this article
impedance match; seawater; shielding effectiveness; switchable electromagnetic shield

Articles in the same Issue

  1. Frontmatter
  2. Research Articles
  3. A planner Doherty power amplifier with harmonic suppression with open and short ended stubs
  4. Effect of moisture content on dielectric properties of banana leaves and peels in frequency range of 1–20 GHz
  5. Enhanced prompt trigger optical switching using nonlinear photonic crystal ring resonator for application on all-optical AND/NAND and OR/NOR logic function
  6. Switchable electromagnetic shield based on seawater
  7. Thermally switchable terahertz metasurface absorber composed of H-fractal and enabled by phase-change material of vanadium dioxide
  8. Sub-terahertz (THz) antenna for Internet of Things and 6G Communication
  9. An optimization of a reconfigurable CPW antenna for RF energy harvesting cognitive radio application
  10. Quintuple band circular monopole antenna with innovative 3-D printed PLA substrate for wireless applications
  11. A simple and compact broadband circularly polarized circular slot antenna for WLAN/WiMAX/DBS applications
  12. Design and Experimental Validation of Miniaturized Self-Triplexing Antenna Employing HMSIW
  13. Compact circular polarized CPW antenna for WLAN and biomedical applications
  14. Miniaturized frequency selective surface with high angular stability
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