Fabrication of conductive woven fabric and analysis of electromagnetic shielding via measurement and empirical equation

Chen, H.C.; Lee, K.C.; Lin, Jia‐Horng; Koch, M.

doi:10.1016/j.jmatprotec.2006.11.030

Cited by 93 publications

(59 citation statements)

References 18 publications

(15 reference statements)

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“…On the other hand, most of the authors 4,19,21,24,26,28,[31][32][33][34][35]38,40,41,[44][45][46][47][48][49]52 prefer to use the coaxial transmission line method specified in ASTM D4935-99 for the measurement of EMSE of conductive textiles. There is also one investigation 33 on the EMSE of conductive textiles that is carried out with both coaxial transmission line and dualcoaxial TEM Cell methods.…”

Section: Electromagnetic Shielding Effectiveness Of Textile Materialsmentioning

confidence: 99%

Comparison of electromagnetic shielding effectiveness of conductive single jersey fabrics with coaxial transmission line and free space measurement techniques

Tezel

Kavuşturan

Vandenbosch

et al. 2013

Textile Research Journal

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The aim of this study is to investigate the electromagnetic shielding effectiveness (EMSE) of thin and lightweight knitted fabrics that are suitable for casual wear like t-shirts. For the purpose of having a low production cost, metal/cotton conductive composite yarns are produced by a yarn doubling technique, involving stainless steel wires (35 m, 50 m) or copper wires (50 m, 70 m) and Ne30/1, Ne40/1, Ne60/2, Ne80/2 count cotton yarns. Single jersey fabrics are knitted on an E20 circular knitting machine with the same machine settings. Coaxial transmission line and free space measurement (by using an anechoic chamber) techniques are used for the EMSE measurements in the frequency range of 100 MHz-1.5 GHz and 1 GHz-18 GHz respectively. The free space measurement technique test results reveal that single jersey knitted fabrics have EMSE ability for the electric field polarization in the same direction as the main direction of the conductive metal wires in the fabric. It is observed that all single jersey fabric structures have more than 7 dB (80% or better) EMSE for GSM-850 and GSM-900 cellular phone communication bands according to coaxial transmission line equipment test results. SNK test results of both test methods reveal that, while 100% cotton fabrics do not have EMSE ability, cotton yarn count is highly significant on the EMSE of single jersey fabrics with conductive composite yarns. Fabrics with two-ply fine cotton yarns (Ne60/2 and Ne80/2) have higher EMSE values than the fabrics with one-ply cotton yarn of the same yarn count (Ne30/1 and Ne40/1).

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Section: Electromagnetic Shielding Effectiveness Of Textile Materialsmentioning

confidence: 99%

Comparison of electromagnetic shielding effectiveness of conductive single jersey fabrics with coaxial transmission line and free space measurement techniques

Tezel

Kavuşturan

Vandenbosch

et al. 2013

Textile Research Journal

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show abstract

“…A laminate of 4-6 layers (thickness > 1.6 mm) of fabric prepared by copper wire and polyamide filament wrapped with polypropylene yarn provided shielding effectiveness of 20-55 dB in frequency range of 30 MHz-1.5 GHz. [22,23] Fabric containing sheath-core yarn, 261 tex copper filament of 38 gauge in core and 4.22 g/m carded cotton sliver as sheath exhibited the highest shielding effect in the range of 760-860 MHz. This fabric was useful for shielding television, computers, gadgets such as cellular phones.…”

Section: Journal Of Electromagnetic Waves and Applications 1455mentioning

confidence: 99%

Ultra-lightweight hybrid woven fabric containing stainless steel/polyester composite yarn for total EMI shielding in frequency range 8–18 GHz

Gupta

Abbas

Abhyankar

2015

Journal of Electromagnetic Waves and Applications

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“…Recently, conductive polymers have been introduced to replace metallic materials. In recent years, many new shielding materials have been tested: 1) polystyrene particles coated with copper by magnetron sputtering [9]; 2) polypropylene mixed glass fibers filled with copper wires [10]; 3) copper wire, polyamide filament, stainless steel wire [11]; 4) fly ash particulate produced aluminum matrix composites [12]; 5) copper wire and polyamide filaments wrapped with polypropylene filaments [13]; 6) multiwalled carbon nanotube filled polyacrylate composite films [14]; 7) glass fabric-epoxy composites containing conductive multi-walled carbon nanotubes [15]; 8) soft magnetic iron, aluminum, silicon alloy polymer composites [16]; 9) soft magnetic stainless steel fiber enabled polyester textiles [17], 10) polyaniline-coated transparent thin films [18], 11) carbon filling cement materials and metal filling cement composites [19].…”

Section: Introductionmentioning

confidence: 99%

The Shielding of Inbound Radiofrequency Electromagnetic Fields at Workplaces

Koppel

Ahonen

2014

Safety of Technogenic Environment

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Abstract. The emergence of new technologies and increased use of wireless voice and data transmissions has increased the human exposure to the radiofrequency (RF) electromagnetic fields (EMFs). Effective reduction measures of these fields have become more relevant in risk management at workplaces. Not only occupational health, but also counter-espionage and low electromagnetic interference are important arguments for RF EMF mitigation. This study investigates the most commonly used mitigation materials and methods of RF EMFs. The materials investigated in this study included: a graphite based paint; a wire netting; a foil paper; a metalized fabric; a transparent conductive film and other solutions. The study undertook two kinds of measurements: 1) a semi-controlled environment was created to test the mitigation materials/methods under equal conditions, 2) measurements were conducted before and after the implementation of the intervention measures in the actual living and working environments. The results revealed great differences in various mitigation materials and methods: under semicontrolled conditions the best shielding capability was achieved by metallized fabric, followed by iron wire netting and foil paper. Iron bars produced moderate screening whereas graphite paint and metallic frame proved to have little effect.

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Fabrication of conductive woven fabric and analysis of electromagnetic shielding via measurement and empirical equation

Cited by 93 publications

References 18 publications

Comparison of electromagnetic shielding effectiveness of conductive single jersey fabrics with coaxial transmission line and free space measurement techniques

Comparison of electromagnetic shielding effectiveness of conductive single jersey fabrics with coaxial transmission line and free space measurement techniques

Ultra-lightweight hybrid woven fabric containing stainless steel/polyester composite yarn for total EMI shielding in frequency range 8–18 GHz

The Shielding of Inbound Radiofrequency Electromagnetic Fields at Workplaces

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