Title: Effects of temperature on the electromagnetic shielding effectiveness under a plane wave excitation

Authors: Tahar Merizgui; Abdechafik Hadjadj; Mecheri Kious; Bachir Gaoui

Addresses: Laboratoire des Semi-Conducteurs et Matériaux Fonctionnels, Université Amar Telidji Laghouat, BP 37G, Laghouat 03000, Algeria ' Laboratoire d'Analyse, de Commande des Systèmes d'Energie et Réseaux Électriques, Université Amar Telidji Laghouat, Algeria ' Laboratoire des Semi-Conducteurs et Matériaux Fonctionnels, Université Amar Telidji Laghouat, BP 37G, Laghouat 03000, Algeria ' Laboratoire des Semi-Conducteurs et Matériaux Fonctionnels, Université Amar Telidji Laghouat, BP 37G, Laghouat 03000, Algeria

Abstract: Sodium cadmium orthonavadates (NaCdVO₄) is a composite material that presents the advantage for being a lightweight material. The general aim behind this paper is to study the shielding behaviour of NaCdVO₄ in thermal applications and particularly the relationships between the shield parameters: electrical conductivity, magnetic permeability, dielectric constant, temperature and how these parameters affect the shielding effectiveness (SE) mechanisms of materials against the electromagnetic interference (EMI). The simulation results of the total SE show that the used composite NaCdVO₄ has the advantages for being an efficient shielding at high temperature and lightweight. This is mainly due to two keys factors. Firstly, the sample presents a lower absorption mechanism as a result of the increased reflection mechanism of the incident wave. Secondly, DC conductivity of the composite shows that the electrical conduction is a thermally activated mechanism, where the electrical conductivity increases at high temperature in the studied range 583 to 699 K compared to other materials such as copper because its conductivity decrease when the temperature increase. So, the obtained results demonstrate that the electrical conductivity is thermally activated for the NaCdVO₄.

Keywords: shielding effectiveness; DC conductivity; temperature; magnetic field; electric field.

DOI: 10.1504/IJDSSS.2019.103376

International Journal of Digital Signals and Smart Systems, 2019 Vol.3 No.1/2/3, pp.20 - 30

Received: 22 Dec 2018
Accepted: 07 Feb 2019
Published online: 05 Nov 2019 *

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