Affiliations: Zhongyuan University of Technology, Zhengzhou, Henan, China
Correspondence:
[*]
Corresponding author: Zhe Liu, Zhongyuan University of Technology, Tongbai Road 59, Zhengzhou 450007, Henan, China. E-mail:gnxfz@zut.edu.cn
Abstract: Numerical calculation of shielding effectiveness (SE) of
electromagnetic shielding fabric (EMSF) is a research difficulty and there
is not an effective method to resolve the difficulty at present. The finite
difference time domain (FDTD) method is used to study this issue in this
paper. Firstly, this paper constructs a structure model based on the warp
and weft densities and yarn diameter according to the structure feature of the
EMSF. Secondly, a physical model of the EMSF is built by determining the
partition coefficient, the Yee's mesh discretization method, and the
absorption boundary which are suitable for the structure model. Then the
excitation parameters are set using the EastFDTD electromagnetic computing
software and the SE is obtained by the numerical calculation for the
physical model. Finally, a number of silver fiber EMSFs and stainless steel
fiber EMSFs with different fabric weaves, densities and metal contents are
tested to verify the proposed model. The calculation data are compared with
actual test data. By analyzing the differences and influencing factors
between the two data, we concluded that the proposed model can calculate the
SE of the EMSF and the results were satisfied. This paper provides a new
method for the numerical calculation of the SE of the EMSF, and possesses an
important reference value for the SE forecast, shielding mechanism analysis,
shielding rules researches and related shielding electromagnetic computation
of the EMSF.
