This paper presents an efficient hybrid method consisting of finite-difference time-domain (FDTD) method, transmission line (TL) equations, and a fast calculation method for excitation fields, which can be applied to the coupling analysis of the shielded cable on the ground excited by plane wave rapidly. It can avoid modeling the infinite ground and the structure of the shielded cable directly. In this hybrid method, the shielded cable is decomposed into external and internal transmission line models, and the corresponding TL equations for the external and internal TL models are established necessarily. Then the FDTD method is utilized to solve the TL equations to obtain the transient responses on the shielding layer and core wires of the cable. A numerous examination of the coupling of coaxial cable exhibits that this hybrid method has very high accuracy and efficiency compared with the SPICE method. Finally, the methods of effective shielding protection of the cable have been proposed by analyzing the influences of the grounding states of the shielding layer, the electromagnetic parameters of the ground and the heights of the cable on the transient responses of the cable.
2. Rajkumar, E. R., B. Ravelo, M. Bensetti, and P. Fernandez-Lopez, "Application of a hybrid model for the susceptibility of arbitrary shape metallic wires disturbed by EM near-field radiated by electronic structures," Progress In Electromagnetics Research B, Vol. 37, 143-169, 2012.
doi:10.2528/PIERB11110908
3. Ravelo, B. and Y. Liu, "Hybrid modelling of near-field coupling onto grounded wire under ultra-short duration perturbation," IOP Conference Series: Materials Science and Engineering, Vol. 67, No. 012013, 1-4, 2014.
4. Baum, C. E., T. K. Liu, and F. M. Tesche, "On the analysis of general multiconductor transmission line networks," Interaction Note 350, Kirtland AFB, NM, 1978.
5. Agrawal, A. K., et al., "Transient response of multiconductor transmission lines excited by a nonuniform electromagnetic field," IEEE Transactions on Electromagnetic Compatibility, Vol. 22, No. 2, 119-129, 1980.
doi:10.1109/TEMC.1980.303824
6. Tesche, F. M. and C. M. Butler, "On the addition of EM field propagation and coupling effects in the BLT equation," Interaction Notes, No. 588, 1-43, 2003.
7. Xu, Q. X. and Y. Z. Xie, "The transient response of discontinuous MTL based on BLT equation," 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM), 411-413, 2015.
8. Du, J. K., S. M. Hwang, J. W. Ahn, and J. G. Yook, "Analysis of coupling effects to PCBs inside waveguide using the modified BLT equation and full-wave analysis," IEEE Transactions on Microwave Theory and Techniques, Vol. 61, No. 10, 3514-3523, 2013.
doi:10.1109/TMTT.2013.2277994
9. Paul, C. R., "A SPICE model for multiconductor transmission lines excited by an incident electromagnetic field," IEEE Transactions on Electromagnetic Compatibility, Vol. 36, No. 4, 342-354, 1994.
doi:10.1109/15.328864
10. Erdin, I., A. Dounavis, and R. Achar, "A SPICE model for incident field coupling to lossy multiconductor transmission lines," IEEE Transactions on Electromagnetic Compatibility, Vol. 43, No. 4, 485-494, 2001.
doi:10.1109/15.974627
11. Paul, C. R., "A SPICE model for multiconductor transmission lines excited by an incident electromagnetic field," IEEE Transactions on Electromagnetic Compatibility, Vol. 36, No. 4, 342-354, 2009.
doi:10.1109/15.328864
12. Xie, H. Y., J. G. Wang, R. Y. Fan, and Y. N. Liu, "SPICE models to analyze radiated and conducted susceptibilities of shielded coaxial cables," IEEE Transactions on Electromagnetic Compatibility, Vol. 52, No. 1, 215-222, 2010.
doi:10.1109/TEMC.2009.2036929
13. Xie, H. Y., J. G. Wang, Y. Li, and H. F. Xia, "Efficient evaluation of multiconductor transmission lines with random translation over ground under a plane wave," IEEE Transactions on Electromagnetic Compatibility, Vol. 56, No. 6, 1623-1629, 2014.
doi:10.1109/TEMC.2014.2330823
14. Xie, H. Y., Y. Li, H. L. Qiao, and J. G. Wang, "Empirical formula of effective coupling length for transmission lines illuminated by E1 HEMP," IEEE Transactions on Electromagnetic Compatibility, Vol. 58, No. 2, 581-587, 2016.
doi:10.1109/TEMC.2016.2518243
15. Ye, Z. H., X. Z. Xiong, and M. Zhang, "A novel time domain hybrid method for coupling problems of long cables excited by electromagnetic pulses," IEEE Transactions on Electromagnetic Compatibility, Vol. 58, No. 6, 1710-1716, 2016.
doi:10.1109/TEMC.2016.2587904
16. Taflove, K. R., B. B. Umashankar, F. Harfoush, and K. S. Yee, "Detailed FDTD analysis of EM fields penetrating narrow slots and lapped joints in thick conducting screens," IEEE Transactions on Antennas and Propagation, Vol. 36, No. 2, 247-257, 1988.
doi:10.1109/8.1102
17. Chen, J. and J. G. Wang, "A three-dimensional semi-implicit FDTD scheme for calculation of shielding effectiveness of enclosure with thin slots," IEEE Transactions on Electromagnetic Compatibility, Vol. 49, No. 2, 354-360, 2007.
doi:10.1109/TEMC.2007.893329
18. Xiong, R., B. Chen, Y. Mao, B. Li, and Q. F. Jing, "A simple local approximation FDTD model of short apertures with a finite thickness," Progress In Electromagnetic Research, Vol. 131, 135-152, 2012.
doi:10.2528/PIER12072201
19. Tesche, F. M., M. V. Ianoz, and T. Karlsson, EMC Analysis Methods and Computational Models, 451-455, Wiley, New York, 1997.
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