Rapid computation model for accurate evaluation of electromagnetic interference shielding effectiveness of fabric with hole based on equivalent coefficient

Article type: Research Article

Authors: Wang, Xiuchen^{a; *} | Liu, Zhe^a | Zhou, Zhong^a

Affiliations: [a] Zhongyuan University of Technology, Zhengzhou, Henan, China

Correspondence: [*] Corresponding author: Xiuchen Wang, Zhongyuan University of Technology, Tongbai Road 59, Zhengzhou 450007, Henan, China. E-mail: nbwangxiuchen@163.com

Abstract: Though electromagnetic interference (EMI) shielding fabric with rectangular hole has wide application in various fields, there is not a mature approach to calculate its shielding effectiveness (SE) at present. This paper constructs a rapid computation model of the SE of the EMI shielding fabric with hole based on equivalent coefficient. Firstly, the rectangular hole characteristic is analyzed and a structure model of the rectangular hole under the consideration of the hole edge characteristic is described. The equivalent relationship between the fabric hole and the standard hole is presented according to the equivalent theory. The rapid computation model of the SE of the EMI shielding fabric with hole is built including the equivalent coefficient and transmission coefficient according to the EMI shielding theory and the method to determine the equivalent coefficient is also given. Finally, the computation model is verified by experiments. The results show that the accuracy and the computational efficiency of the proposed model are good, and the model can be applied to the fabrics with wide weaves and various rectangular hole sizes.

Keywords: Hole, electromagnetic interference shielding fabric, shielding effectiveness, computation model

DOI: 10.3233/JAE-140023

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 47, no. 1, pp. 177-185, 2015