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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2023-11-09
Low-Frequency Magnetic Shielding of a Cavity Formed by Two Imperfectly Conducting Sheets: Effect of Sheet-to-Sheet Distance and Comparison with the Single-Sheet Configuration
By
Fubin Pang,

    Dr. Fubin Pang

    State Grid Jiangsu Electric Power Co., Ltd. Research Institute

    China

    Homepage

Shi Chen,

    Dr. Shi Chen

    State Grid Jiangsu Electric Power Co., Ltd. Research Institute

    China

    Homepage

Jianfei Ji,

    Dr. Jianfei Ji

    State Grid Jiangsu Electric Power Co., Ltd. Research Institute

    China

    Homepage

Yiyi Jing,

    Dr. Yiyi Jing

    North China Electric Power University

    China

    Homepage

Sijia Liu,

    Dr. Sijia Liu

    North China Electric Power University

    China

    Homepage

Chongqing Jiao

    Professor Chongqing Jiao

    North China Electric Power University

    China

    Homepage

Progress In Electromagnetics Research M, Vol. 121, 13-26, 2023
doi:10.2528/PIERM23082601 | Google Scholar

Abstract
In standard measurement methods such as NSA 94-106, the low-frequency magnetic shielding effectiveness of a shielding enclosure is tested using the near field of loop antenna. Under this near-field configuration, there is no analytical or closed-form solution for volumetric shielding like box/cavity except for planar shielding like a sheet of infinite extension. Exploring the correlation between volumetric shielding and planar shielding can provide simple prediction methods for volumetric shielding based on planar shielding. As a taste to this end, this article explores the difference between the shielding effectiveness of a double-sheet cavity and a single sheet under the NSA 94-106 standard. We derived the exact solution in integral form for electromagnetic fields inside the cavity and calculated the curves of shielding effectiveness on the frequency with different sheet material, thickness, and sheet-to-sheet distance. The results show that when the distance from the receiving antenna to the back sheet is greater than the diameter of the loop antenna, the results of a double-sheet cavity tend to be consistent with a single-sheet configuration. When the distance is less than the diameter, the difference between the two depends on material type and sheet thickness.
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Citation
Fubin Pang, Shi Chen, Jianfei Ji, Yiyi Jing, Sijia Liu, and Chongqing Jiao, "Low-Frequency Magnetic Shielding of a Cavity Formed by Two Imperfectly Conducting Sheets: Effect of Sheet-to-Sheet Distance and Comparison with the Single-Sheet Configuration," Progress In Electromagnetics Research M, Vol. 121, 13-26, 2023.
doi:10.2528/PIERM23082601
References

1. Zhou, Y., L. Zhang, and S. Xiu, "Design and analysis of platform shielding for wireless charging tram," IEEE Access, Vol. 7, 129443-129451, 2019.
doi:10.1109/ACCESS.2019.2939197        Google Scholar

2. Lee, S., D. H. Kim, Y. Cho, et al. "Low leakage electromagnetic field level and high efficiency using a novel hybrid loop-array design for wireless high power transfer system," IEEE Trans. Ind. Electron., Vol. 66, No. 6, 4356-4367, Jul. 2018.
doi:10.1109/TIE.2018.2851988        Google Scholar

3. Mohammad, M., E. T. Wodajo, S. Choi, et al. "Modeling and design of passive shield to limit EMF emission and to minimize shield loss in unipolar wireless charging system for EV," IEEE Transactions on Power Electronics, Vol. 34, No. 12, 12235-12245, 2019.
doi:10.1109/TPEL.2019.2903788        Google Scholar

4. Mou, W. and M. Lu, "Research on shielding and electromagnetic exposure safety of an electric vehicle wireless charging coil," Progress In Electromagnetics Research C, Vol. 117, 55-72, 2021.
doi:10.2528/PIERC21072701        Google Scholar

5. Kellogg, J., "Navigating the selection of magnetic resonance imaging shielding systems," IEEE Transactions on Electromagnetic Compatibility, Vol. 3, No. 1, 43-46, 2021.        Google Scholar

6. Collier, L., et al. "Magnetic field diffusion in medium-walled conductors," IEEE Transactions on Plasma Science, Vol. 47 , No. 1, 1024-1031, 2019.
doi:10.1109/TPS.2018.2881453        Google Scholar

7. Giaccone, L., V. Cirimele, and A. Canova, "Mitigation solutions for the magnetic field produced by MFDC spot welding guns," IEEE Transactions on Electromagnetic Compatibility, Vol. 62, No. 1, 83-92, 2020.
doi:10.1109/TEMC.2018.2877805        Google Scholar

8. Celozzi, S., R. Araneo, and G. Lovat, Electromagnetic Shielding: Theory and Applications, 2nd Edition, Wiley, Hoboken, NJ, USA, 2023.

9. Tesche, F. M., M. V. Ianoz, and T. Karlsson, EMC Analysis Methods and Computational Models, Wiley-Interscience Press, New York, 1996.

10. Lee, K. S. H. and G. Bedrosian, "Diffusive electromagnetic penetration into metallic enclosures," IEEE Trans. Antennas Propagat., Vol. 27, No. 2, 194-198, 1979.
doi:10.1109/TAP.1979.1142064        Google Scholar

11. "Specification for Shielded Enclosures," Specification NSA, 94-106, 1994.        Google Scholar

12. "IEEE Standard Method for Measuring the Effectiveness of Electromagnetic Shielding Enclosures," IEEE Standard 299-2006, 2007.        Google Scholar

13. Moser, J. R., "Low-frequency shielding of a circular loop electromagnetic field source," IEEE Trans. Electromagn. Compat., Vol. 9, No. 1, 6-18, 1967.
doi:10.1109/TEMC.1967.4307447        Google Scholar

14. Qin, D. and C. Jiao, "Low-frequency magnetic shielding of planar screens: effects of loop radius and loop-to-loop distance," IEEE Transactions on Electromagnetic Compatibility, Vol. 64, No. 2, 367-377, 2021.
doi:10.1109/TEMC.2021.3118543        Google Scholar

15. Andrieu, G., J. Panh, A. Reineix, et al. "Homogenization of composite panels from a nearfield magnetic shielding effectiveness measurement," IEEE Transactions on Electromagnetic Compatibility, Vol. 54, No. 3, 700-703, Jun. 2012.
doi:10.1109/TEMC.2012.2186455        Google Scholar

16. Lovat, G., P. Burghignoli, R. Araneo, and S. Celozzi, "Magnetic shielding of planar metallic screens: A new analytical closed-form solution," IEEE Transactions on Electromagnetic Compatibility, Vol. 62, No. 5, 1884-1888, Oct. 2020.
doi:10.1109/TEMC.2019.2952401        Google Scholar

17. Ryan, C. M., "Computer expression for predicting shielding effectiveness for the low-frequency plane shield case," IEEE Transactions on Electromagnetic Compatibility, Vol. 9, No. 2, 83-94, 1967.
doi:10.1109/TEMC.1967.4307468        Google Scholar

18. Jiao, C., F. Ning, X. Yang, et al. "Low-frequency magnetic shielding of planar shields: A unified wave impedance formula for the transmission line analogy," IEEE Transactions on Electromagnetic Compatibility, Vol. 63, No. 4, 1046-1057, 2021.
doi:10.1109/TEMC.2021.3052779        Google Scholar

19. Matsuzawa, S., T. Kojima, K. Mizuno, et al. "Electromagnetic simulation of low-frequency magnetic shielding of a welded steel plate," IEEE Transactions on Electromagnetic Compatibility, Vol. 63, No. 6, 1896-1903, 2021.
doi:10.1109/TEMC.2021.3087187        Google Scholar

20. Zhang, Z., X. Yang, C. Jiao, et al. "Analytical model for low-frequency magnetic field penetration through a circular aperture on a perfect electric conductor plate," IEEE Transactions on Electromagnetic Compatibility, Vol. 63, No. 5, 2599-1604, 2021.
doi:10.1109/TEMC.2021.3065064        Google Scholar

21. Sun, Z., W. Dong, D. Y. Qin, et al. "Approximate simulation of low-frequency magnetic shielding of a rectangular shielding box with all walls perforated periodical holes," Progress In Electromagnetics Research Letters, Vol. 117, 55-72, 2021.        Google Scholar

22. Lovat, G., P. Burghignoli, R. Araneo, et al. "Shielding of an imperfect metallic thin circular disk: Exact and low-frequency analytical solution," Progress In Electromagnetics Research, Vol. 167, 1-10, Jan. 2020.
doi:10.2528/PIER19090908        Google Scholar

23. "Comsol software," [Online] Available: https://www.comsol.asia/comsol-multiphysics.

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