A Test Method for Shielding Effectiveness of Materials against Electromagnetic Pulse Based on Coaxial Flange
Energies, ISSN: 1996-1073, Vol: 16, Issue: 18
2023
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Research from Northwest Institute of Nuclear Technology in the Area of Electronics Published (A Test Method for Shielding Effectiveness of Materials against Electromagnetic Pulse Based on Coaxial Flange)
2023 OCT 09 (NewsRx) -- By a News Reporter-Staff News Editor at Electronics Daily -- Research findings on electronics are discussed in a new report.
Article Description
Aiming at the evaluation of the shielding effectiveness (SE) of materials against high-intensity electromagnetic pulse (EMP), the shielding mechanism in the frequency domain is investigated, and the factors that determine SE such as conductivity, thickness of material, and test frequency are analyzed. The attenuated waves of solid and perforated plate materials irradiated by EMP are simulated in CST. The results show that the two materials exhibit low-pass and high-pass filtering characteristics, respectively, which lead to a big difference in the transmitted waves (rise time and pulse width). Based on this, a time domain SE test method using coaxial flange is proposed which can obtain the incident and the transmitted and reflected waves, and the time domain SE of graphenes with different thicknesses (80, 100, 200, and 300 μm) are measured. The characteristics of the reflected and transmitted waves are analyzed in detail, and the change regulations comply with the theoretical shielding model well. The peak value SE and energy density SE, respectively, are calculated. Furthermore, the frequency domain SE can be obtained through the Fourier transform, so the method has a wide application in material SE performance evaluation against high-intensity EMP.
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