Electromagnetic Shielding Effectiveness of Multifunctional Metal Composite Fabrics

Abstract

The growth of the electronic industry and the widespread use of electronic equipment in communications, computations, automations, bio-medicine, space, and other purposes have led to many electromagnetic interference (EMI) problems as systems operate in close proximity. It is likely to become more severe in the future, unless proper EMI control methodology and techniques are used to meet the electromagnetic compatibility requirements. This article presents a comprehensive review of EMI shielding theory and materials. Furthermore, a method for fabricating a multifunctional metal composite fabric with electromagnetic (EM) shielding characteristics was successfully developed. The parameters influencing EM shielding properties of the metal composite fabrics were investigated. It was shown that the EM shielding effectiveness of the metal composite fabrics could be tailored by modifying the metal grid size and geometry.

Electromagnetic Scattering From Bi-Periodic Fabric Structures

“…Interaction of electromagnetic waves with textiles and fabric structures is currently of significant importance for several different applications such as personal thermal management [1,2], wearable energy harvesting [3,4], solar-cell carpeting [5,6], shielding against hazardous radiations [7,8] and medical dressings [9,10]. Moreover, such structures can be regarded as constituent layers of 3D photonic crystals and woodpile structures.…”

Hazards and Mitigation Measures in Aerospace Non-Destructive Testing

“…Workers should wear, and verify the effectiveness of, clothing and face/eye protection designed to shield EMF (Roh, Chi, Kang, & Nam, 2008). Companies must ensure that EMF exposures remain within permissible levels before resuming eddy current and magnetic particle inspection activity.…”

An Innovative Test Apparatus for Electromagnetic Shielding Effectiveness Test of Textile Materials

“…Çoklu yansımaya bağlı zayıflamalar genellikle ihmal edilmektedir [12]. Şekil 2'de kalınlığı "t" olan kayıplı bir duvarda kalkanlama için mekanizma gösteril-miştir.…”

“…Bu zorlanmış salınım yapan yük bir anten gibi davranır ve mevcut dalgayı geri yansıtarak yansımaya neden olur [12][13][14][15][16]. Bir başka ifade ile dalganın uzaydaki empedansı ekrandaki empedansından farklı olduğunda elektromanyetik ekrandan yansıma olur.…”

“…Dalga empedansı, manyetik alanlar (düşük empedans) ve elektrik alanlar (yüksek empedans) için farklı olduğundan her dalga tipi için ekrandaki yansıma farklı karakteristikler gösterir. Metaller gibi elektrik iletken materyaller elektromanyetik alanların ekranın içine işlemesini önleyecek şekilde yansıtır [12]. Yansıma, ekran özellikli malzemenin hem dış yüzeyinde, hem de iç kısmında gerçekleşmektedir.…”