Comparison Electromagnetic Shielding Effectiveness Between Smart Multilayer Arrangement Shields

Merizgui, Tahar; Hadjadj, Abdechafik; Gaoui, Bachir; Kious, Mecheri

doi:10.1109/icass.2018.8651965

Cited by 14 publications

(6 citation statements)

References 13 publications

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“…Which is quite different from its behavior in far field, when the wave impedance is constant and it is equal to 377 Ω of the medium. The distinctive impedance of a media is expressed by the ratio of the electric field E to the magnetic field H. It is given by the equation [10][11][12]:…”

Section: Introductionmentioning

confidence: 99%

Enhanced of Electrical Properties and Shielding Efficiency of Hybrid Composite with Temperature

Merizgui¹,

Hadjadj²,

Kious³

et al. 2019

RCMA

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In this paper, we present a comparison study between theoretical and experimental results to improve the performance of materials such as electrical proprieties (permeability, permittivity, and conductivity) and shielding efficiency at high temperature by using a different designation of hybrid composite. The main aim of this research study is to prepare a high stable microwave shielding hybrid epoxy composite with a modified surface MWCNTs and Iron (III) oxide nano particles addition in epoxy resin matrix/Kenaf fibre. The morphology of the obtained shields was investigated by scanning electron microscopy. Thus, additions of MWCNTs and iron (III) oxide particles increase the shielding effectiveness with a modified surface on these reinforcements by increasing the electrical behavior against the external radiation at high temperature of epoxy matrix with incremental of temperature.

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Section: Introductionmentioning

confidence: 99%

Enhanced of Electrical Properties and Shielding Efficiency of Hybrid Composite with Temperature

Merizgui¹,

Hadjadj²,

Kious³

et al. 2019

RCMA

Self Cite

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show abstract

Section: Introductionmentioning

confidence: 99%

“…[7] The electrical dissipation is related to the conductivity of the material when EMI SE increases with the electrical conductivity whereas the energy storage is related to the dielectric permittivity of the material which influences on the EMI SE by absorption coefficient. [8,9] In several engineering implementation, the HPMCs are subjected to incremental temperature, so the high temperature and its impacts were carried out. Due to the vibration of molecules when temperature rises, the heat is created within the polymer composite and leads to a lower conductance loss in the HPMC.…”

mentioning

confidence: 99%

Electromagnetic shielding effectiveness improvement with high temperature in far‐field behavior multiwall carbon nanotube/iron (III) particles addition in composites

et al. 2020

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The hybrid polymer composite (HPMC) are increasingly used in the most shielding applications in the far field region, but the main problem is these HPMC should be having a good shielding efficiency and works at high temperature. The purpose of this research study was to prepare a high stable microwave shielding hybrid polymer composite for incremental temperature implementations with surface modified MWCNTs and Fe2O3 filled contents. In this paper, the kenaf fiber, Iron (III) oxide and MWCNTs particles were surface‐treated by APTMS for effective dispersion and adhesion on epoxy matrix medium. The morphology of the obtained shields was investigated by scanning electron microscopy. Thus, additions of MWCNTs and Iron (III) oxide particles increase the magnetic permeability and electrical permittivity of epoxy polymer matrix at high temperature (25°C‐100°C‐200°C). The kenaf fibers increase the mechanical properties such as the flexural, tensile. The principal advantages of these compositions are its low cost and its higher electrical conductivity which make it a suitable material as shielding material against electromagnetic field at high temperature. For electromagnetic compatibility in the far‐field regions, the adequate SE in the frequency range of 2 to 18 GHz of the epoxy polymer matrix‐kenaf fiber conducting composites was obtained by adding the MWCNT and Fe2O3 particles.

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“…All electronic tools that distribute or transmit electrical energy create electromagnetic waves, which have harmful impacts on human health, surrounding environment, and device performance [1]. The electromagnetic wave created by them gradually interfere with each other, as well are called the electromagnetic interference (EMI) [2][3][4][5][6][7][8]. In fact, the composite material that designed for the electromagnetic compatibility (EMC) applications contain conductive fibres (High electrical conductivity σ>>0) embedded in a dielectric medium (electrical conductivity σ=0) [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The electromagnetic wave created by them gradually interfere with each other, as well are called the electromagnetic interference (EMI) [2][3][4][5][6][7][8]. In fact, the composite material that designed for the electromagnetic compatibility (EMC) applications contain conductive fibres (High electrical conductivity σ>>0) embedded in a dielectric medium (electrical conductivity σ=0) [3,4]. In general the conductive fillers are usually added with polymers or in elastomer to increase the conductivity of matrix to attenuate the incoming microwaves similarly the magnetic fillers such as ferric oxide, nickel and cobalt particles are added with polymeric materials to improve magnetic behavior of base matrix to block the incoming magnetic field of microwave.…”

Section: Introductionmentioning

confidence: 99%

Impact of Temperature Variation on the Electromagnetic Shielding Behavior of Multilayer Shield for EMC Applications

Merizgui¹,

Hadjadj²,

Kious³

et al. 2019

RCMA

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This paper attempts to disclose how temperature variation affects the electromagnetic shielding of a multilayer composite made of copper (Cu) fibers surrounded by silicon (Si). The model of the composite was fabricated by physical vapor deposition method, and tested with the temperature rising from room temperature (RT), 50º C, 85º C to 110º C. Under these temperatures, several electromagnetic shielding parameters of the composite were measured in various operating microwave frequencies (E, F, I and J bands). Among them, dielectric permittivity was acquired by LCR tester, magnetic permeability was measured by vibrating sample magnetometer (VSM), and the electromagnetic (EM) wave attenuation was recorded by typical microwave test bench. The results show that the composite had an EMI shielding of 20dB at 85º and 100dB at the RT; the reflection loss of the composite (volume fraction: 0.32) was also 100dB at the RT. Thus, the temperature rise suppresses the reflection loss; the composite has better electromagnetic shielding effect at the RT than at elevated temperatures; the volume faction enhances the wave attenuation of the composite. The results provide a good reference for the design of stable electromagnetic shielding materials at elevated temperatures.

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Comparison Electromagnetic Shielding Effectiveness Between Smart Multilayer Arrangement Shields

Cited by 14 publications

References 13 publications

Enhanced of Electrical Properties and Shielding Efficiency of Hybrid Composite with Temperature

Enhanced of Electrical Properties and Shielding Efficiency of Hybrid Composite with Temperature

Electromagnetic shielding effectiveness improvement with high temperature in far‐field behavior multiwall carbon nanotube/iron (III) particles addition in composites

Impact of Temperature Variation on the Electromagnetic Shielding Behavior of Multilayer Shield for EMC Applications

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