Open AccessModelling and testing the electromagnetic near field shielding effectiveness achieved by woven fabrics with conductive yarns
Author(s) -
Rădulescu Ion Răzvan,
Lilioara Surdu,
Emilia Visileanu,
Marian Costea,
Ion Pătru,
Viorica Voicu
Publication year - 2018
Publication title -
industria textilă
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.281
H-Index - 14
ISSN - 1222-5347
DOI - 10.35530/it.069.03.1508
Subject(s) - electromagnetic shielding , electrical conductor , electromagnetic compatibility , woven fabric , materials science , composite material , electromagnetic field , flexibility (engineering) , enclosure , mechanical engineering , electrical engineering , engineering , statistics , physics , mathematics , quantum mechanics
The current extensively development of electrical devices and telecommunication requires adequate solutions forensuring electromagnetic compatibility (EMC). One of the main solutions provided by EMC is the shielding againstelectromagnetic (EM) radiation. Conventional screens for EM radiation are constructed from metallic plates, however,fabrics with conductive yarns may be used as well, with multiple advantages: lightweight, flexibility, mechanicalresistance and 3D shape ability.The paper addresses the shielding of the electromagnetic near field, by proposing an analytic relation taking into accountboth geometrical and electrical parameters of the fabric, based on the circuit method. A validation study was performed,by measuring the shielding effectiveness of an enclosure with a cover from woven fabrics with conductive yarns. Theexperimental setup includes both the electrical measurement devices, as well as a set of five woven fabrics withconductive yarns from stainless steel and silver. The experimental results for the electromagnetic near field frequencyrange (1–20 MHz) present values in good relationship to the analytic relation.The simplified analytic relation allows the computing of the distance between the conductive yarns of the woven fabricin relation to the targeted shielding effectiveness. This relation supports the design process of a fabric, with balancebetween its costs and its target shielding effectiveness.