Effect and mechanism of the opening area on the shielding effectiveness of an electromagnetic shielding garment

IF 1.6 4区工程技术 Q2 MATERIALS SCIENCE, TEXTILES

Textile Research Journal Pub Date : 2024-08-12 DOI:10.1177/00405175241266616

Xiuchen Wang, Miaomiao Kang, Yajing Wang, Zhe Liu

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引用次数: 0

Abstract

The opening area has an important effect on the overall protective performance of electromagnetic shielding (EMS) garments, but its mechanism and influencing laws are not clear. In this paper, a semi-anechoic chamber is adopted to construct a testing system, and a tying and covering method is proposed to test the shielding effectiveness (SE) of the garment with different parameters of opening area. Combined with electromagnetic theory, experimental results are analyzed, and influence laws and mechanisms of the opening area on the overall SE of the garment are discovered. Based on this, some new ideas for designing and evaluating EMS garment are proposed. We conclude that the opening area has a reducing effect on the SE of the garment in the frequency range of 1–3 GHz. The larger the size of the opening area, the more obvious the effect is. When reaching a certain size, the value of overall SE reaches zero or can even be negative, resulting in a significant decrease in the protective performance of the garment or even complete loss of its protective effect. The distance between the opening and the test point has a significant influence on the SE of the garment: the closer the distance, the greater the influence is. The opening closest to the testing point has a decisive effect on the overall SE of the garment. The style of opening area has a significant influence on the SE of the garment: pleated or inclined shape can improve the SE. Based on the above rules, a multi-index comprehensive weighted testing evaluation method for an EMS garment that fully considers the influence proportion of each opening is proposed, providing a scientific reference for the design, production, testing, and evaluation of EMS garments.

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开口面积对电磁屏蔽服屏蔽效果的影响和机理

开口面积对电磁屏蔽服装的整体防护性能有重要影响，但其作用机理和影响规律尚不明确。本文采用半消声室构建测试系统，提出了绑扎覆盖法测试不同开口面积参数下服装的屏蔽效能（SE）。结合电磁理论，对实验结果进行了分析，发现了开口面积对服装整体屏蔽效果的影响规律和机理。在此基础上，提出了一些设计和评估 EMS 服装的新思路。我们得出结论：在 1-3 GHz 频率范围内，开口面积对服装的 SE 有降低作用。开口面积越大，效果越明显。当达到一定尺寸时，整体 SE 值为零，甚至可能为负值，导致服装的防护性能显著下降，甚至完全丧失防护效果。开口与测试点之间的距离对服装的 SE 有很大影响：距离越近，影响越大。最靠近测试点的开口对服装的整体 SE 有决定性影响。开口区域的样式对服装的 SE 有重大影响：褶皱或倾斜形状可提高 SE。根据上述规则，提出了一种充分考虑各开口影响比例的 EMS 服装多指标综合加权测试评价方法，为 EMS 服装的设计、生产、测试和评价提供了科学参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Textile Research Journal 工程技术-材料科学：纺织

CiteScore

4.00

自引率

21.70%

发文量

309

审稿时长

1.5 months

期刊介绍： The Textile Research Journal is the leading peer reviewed Journal for textile research. It is devoted to the dissemination of fundamental, theoretical and applied scientific knowledge in materials, chemistry, manufacture and system sciences related to fibers, fibrous assemblies and textiles. The Journal serves authors and subscribers worldwide, and it is selective in accepting contributions on the basis of merit, novelty and originality.