Modelling the micro-structure of non-uniform conductive non-woven fabrics: Determination of sheet resistance

TY - GEN

T1 - Modelling the micro-structure of non-uniform conductive non-woven fabrics: Determination of sheet resistance

AU - Austin, A N

AU - Dawson, J F

AU - Flintoft, I D

AU - Marvin, A C

N1 - © 2015 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

PY - 2015

Y1 - 2015

N2 - The plane-wave shielding effectiveness of conductive non-woven fabrics is dominated by the sheet conductance over a wide range of frequencies until the effects of skin depth, and apertures start to influence the performance (typically at 1-10GHz depending on the areal density). This paper describes models for determining the sheet conductance from knowledge of the type, quantity, orientation and contact resistance of the fibres in the fabricated material. The stochastic nature of these materials, their complexity and local scale variability has been included in the models and correlates well with experimentalresults. The anisotropic sheet conductance is modelled to within 1% of the measured value in the high shielding orientation and to within 2% in the orthogonal orientation using an inter-fibre contact resistance estimated to be 10 kΩ.

AB - The plane-wave shielding effectiveness of conductive non-woven fabrics is dominated by the sheet conductance over a wide range of frequencies until the effects of skin depth, and apertures start to influence the performance (typically at 1-10GHz depending on the areal density). This paper describes models for determining the sheet conductance from knowledge of the type, quantity, orientation and contact resistance of the fibres in the fabricated material. The stochastic nature of these materials, their complexity and local scale variability has been included in the models and correlates well with experimentalresults. The anisotropic sheet conductance is modelled to within 1% of the measured value in the high shielding orientation and to within 2% in the orthogonal orientation using an inter-fibre contact resistance estimated to be 10 kΩ.

KW - sheet resistance

KW - shielding effectiveness

KW - stochastic material

KW - contact resistance

KW - anisotropic material

KW - circuit model

U2 - 10.1109/ISEMC.2015.7256122

DO - 10.1109/ISEMC.2015.7256122

M3 - Conference contribution

SP - 1

EP - 6

BT - Electromagnetic Compatibility (EMC Europe), 2015 International Symposium on

ER -