FDTD computation of shielding effectiveness of electromagnetic shielding fabric based on weave region

Zhe Liu, Yaping Li, Zhen Pan, Ying Su and Xiuchen Wang

Journal of Electromagnetic Waves and Applications, 2017, vol. 31, issue 3, 309-322

Abstract: Numerical computation of shielding effectiveness (SE) of electromagnetic shielding fabric (EMSF) is a research difficulty, making no a suitable model for it at present. This paper proposes a partition method based on the yarn diameter and fabric weave structure. The fabric is divided into overlapping region, lateral single yarn region, longitudinal single yarn region, and interstice region according to the weave feature. A fabric structure model for FDTD numerical computation of the SE is constructed. The electromagnetic parameters of each region are tested according to the transmission and reflection method. The Yee’s grid discretization method of the structure model is given, and the absorption boundary and the excitation parameters are set to determine the physical model of the fabric. The numerical computation of the physical model is done by the East FDTD electromagnetic computation software. The computation data are compared with the actual testing data, and the results show that the computation results of the SE of the EMSF with the proposed model are satisfied. The research in this paper provides an important reference value for the design, production, evaluation, and theoretical study of the EMSF.

Date: 2017
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DOI: 10.1080/09205071.2016.1277957

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