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Licensed Unlicensed Requires Authentication Published by De Gruyter January 23, 2020

Approach to Precisely Model an Underwater Electric Dipole Source with TSS-FDTD

  • Shitian Zhang , Kuisong Zheng ORCID logo EMAIL logo , Xiaoyun Tu and Mingyue Yang
From the journal Frequenz

Abstract

Due to the fields in the near-field area of an electric dipole source which is sharply and rapidly varying with distance, a novel approach to introduce an underwater low-frequency excited source is proposed in this paper. The approach is built up to combine the theoretical solution for an electric dipole in a conductive medium with the total-field scattered-field boundary to reduce the error in modeling the source. The spatial distributions of the magnetic field amplitude at a distance of 1 km above the sea surface are discussed. The numerical results verified the accuracy and validity of the approach by comparing with the results of the Sommerfeld numerical integration method.

Funding statement: This work was supported in part by the National Natural Science Foundation of China under Grant 61401361 and 61971351.

References

[1] M. Balsi, S. Esposito, and F. Frezza, “GPR measurements and FDTD simulations for landmine detection,” Proceedings of the XIII Internarional Conference on Ground Penetrating Radar, pp. 1–5, 2010.10.1109/ICGPR.2010.5550213Search in Google Scholar

[2] F. A. Sadjadi, A. Sullivan, and G. C. Gaunaurd, “Finding underground targets by means of change-detection methods in Huynen spaces,” IEEE Trans. Aerosp. Electron. Sys., vol. 46, no. 3, pp. 1404–1421, 2010.10.1109/TAES.2010.5545197Search in Google Scholar

[3] J. P. Berebger, “Extension of the FDTD Huygens subgridding algorithm to two dimensions,” IEEE Trans. Antennas Propag., vol. 57, no. 12, pp. 3960–3867, 2009.Search in Google Scholar

[4] Y. Xia and D. M. Sullivan, “Underwater FDTD simulation at extremely low frequencies,” IEEE Antennas Wirel. Propag. Lett., vol. 7, pp. 661–664, 2008.10.1109/LAWP.2008.2010066Search in Google Scholar

[5] D. Ge and Y. Yan, The Finite-difference Time-domain Method for Electromagnetic Wave. XI’AN: Xidian University, 2002.Search in Google Scholar

[6] K. S. Zheng, H. Luo, Z. M. Mu, and G. Wei, “Parallel TSS-FDTD method for analyzing underwater low-frequency electromagnetic propagation,” IEEE Antennas Wirel. Propag. Lett., vol. 15,, pp. 1217–1220, 2016.10.1109/LAWP.2015.2502270Search in Google Scholar

[7] K. S. Zheng, X. P. Liu, S. T. Zhang, L. F. Xu, and Y. Q. Zhang, “Accelerating computation of electromagnetic properties for low-frequency wave propagating across the sea-air interface,” IEEE Antennas Wirel. Propag. Lett., vol. 16,, pp. 2646–2650, 2017.10.1109/LAWP.2017.2739753Search in Google Scholar

[8] L. F. Xu, K. S. Zheng, S. T. Zhang, and Y. J. Li, “Low-frequency scattering fields of a hollow ellipsoid enclosed by sea water,” Chinese J. Radio Sci., vol. 33, no. 5, pp. 613–618, 2018.Search in Google Scholar

[9] K. S. Zheng, L. F. Xu, S. T. Zhang, Y. J. Li, and G. Wei, “Cascaded TSS-FDTD for analyzing underwater low-frequency electromagnetic propagation,” 2018 International Applied Computational Electromagnetics Society Symposium in China, July 29-August 1, 2018, Beijing, China.10.23919/ACESS.2018.8669365Search in Google Scholar

[10] D. M. Sullivan, “Exceeding the courant condition with the FDTD method,” IEEE Microw. Guid. Wave Lett., vol. 6, no. 8, pp. 289–291, Aug. 1996.10.1109/75.508556Search in Google Scholar

[11] J. A. Kong, Electromagnetic Wave Theory. Cambridge: EMW publishing, 2002.Search in Google Scholar

[12] W. P. King, M. Owens, and T. T. Wu, Lateral Electromagnetic Waves. New York: Springer, 1992.10.1007/978-1-4613-9174-6Search in Google Scholar

[13] W. Y.Pan, Long-wave Ultra-long Wave Propagation. ChengDu: University of Electronic Science and Technology of China, 2004.Search in Google Scholar

Received: 2019-04-30
Published Online: 2020-01-23
Published in Print: 2020-03-26

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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