Shielding Effectiveness of Materials Under the Excitation of High-Power Microwave

Yan, Zhiyang; Qin, Fangfang; Cai, Jinliang

doi:10.1109/temc.2019.2951278

Cited by 7 publications

(6 citation statements)

References 17 publications

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“…Whether the shielding performance of materials will be affected by the parameters of high-intensity transient electromagnetic pulse is crucial for their practical applications. In a piece of previous work [31], a comprehensive investigation about shielding performance of materials under the excitation of HPM has been performed. It has been found that with the increase of the power density (~E 2 /377) of HPM, the SE of materials first keeps unchanged, then increases and finally saturates, and other parameters like repetition frequency and pulse width of HPM have a negligible effect on the shielding performance of materials.…”

Section: Shielding Performance Under the Excitation Of High-intenmentioning

confidence: 99%

“…Comparative SE measurements were further performed on these four kinds of shielding materials with the excitation of HPM. The experimental setup for HPM SE measurements has been well introduced in an article published by us recently [31]. An L-band klystron microwave power This article has been accepted for publication in a future issue of this journal, but has not been fully edited.…”

Section: Shielding Performance Under the Excitation Of High-intenmentioning

confidence: 99%

“…As to high-intensity transient electromagnetic pulse, related work mainly focus on theoretic analysis, numerical simulation and experimental investigation based on standard waveforms such as Gauss pulse, double exponential pulse and square pulse [22]- [30]. Till very recently, a comprehensive study on the shielding performance of materials under the excitation of HPM was conducted [31], and Per Ängskog et This article has been accepted for publication in a future issue of this journal, but has not been fully edited. Content may change prior to final publication.…”

Section: Introductionmentioning

confidence: 99%

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Shielding Performance of Materials Under the Excitation of High-Intensity Transient Electromagnetic Pulse

et al. 2021

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Shielding effectiveness (SE) dominates the shielding performance of materials. Under the excitation of high-intensity transient electromagnetic pulse, especially the wide-band transient electromagnetic pulse, how to characterize and calculate the SE of shielding materials is not clear. In order to reveal the shielding performance of materials towards the wide-band transient electromagnetic pulse, a systematic experimental investigation was performed on a home-made SE measurement system. The "peak value reduction (SE PR )" is verified to be an effective approach for the characterization of SE of shielding materials. The SE of the employed materials shows no noticeable change even with the excitation field intensity increasing to 200 kV/m, which is significantly different from that of high-power microwave (HPM). Under the excitation of HPM, the SE of materials starts to increase at a field intensity of 19.4 kV/m and becomes saturated at 33.6 kV/m. Further analysis discloses that the variation of SE of materials is mainly dependent on two factors, one is the intrinsic property of the material itself, and the other is energy density spectrum of the excitation high-intensity transient electromagnetic pulse. The energy in per frequency unit (10 MHz) for wide-band transient electromagnetic pulse is far lower than that of HPM, resulting in an evident dissimilarity in the changes of SEs of shielding materials.INDEX TERMS shielding performance, wide-band transient electromagnetic pulse, peak value reduction, energy density spectrum.

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Section: Shielding Performance Under the Excitation Of High-intenmentioning

confidence: 99%

Section: Shielding Performance Under the Excitation Of High-intenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shielding Performance of Materials Under the Excitation of High-Intensity Transient Electromagnetic Pulse

et al. 2021

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“…Fortunately, these systems don't give out strong interference, which is easy to filter out. With the development of high power microwave equipment, strong electromagnetic pulse or interference poses a huge threat to the general operation of electronic equipment [11]. Thus, electromagnetic protection and electromagnetic shielding are vital to reduce the loss caused by these threats.…”

Section: Introductionmentioning

confidence: 99%

Recent Developments of Shielding Effectiveness for Electronics and Information Devices

Jiang

et al. 2023

ACES Journal

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With the increase wireless communications, many wireless devices and equipment have been invented for special applications, resulting in mutual interference that might destroy the systems or distort signal in-transmission. One of the effective methods to reduce or eliminate interference is to devise a shielding to block the unwanted interference in between the approaching systems, circuits, devices, etc. Thus, shielding and estimation of its effectiveness are very important in order to protect the information devices from potential interference and to improve the performance of information equipment. In this survey, we present the recent developments of the shielding and shielding effectiveness techniques and methods, and give a design for an electromagnetic shielding structure.

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“…Consequently, the study of HPEMP coupling effects in sensitive electronic systems is of great importance [1,2]. It is noted that HPEMPs have a strong energy and wide frequency spectrum, which not only can cause direct disability to the electronic systems of vehicles but also can interfere with or damage the electronic control system by powerful coupling through windows, apertures, or antennas [3][4][5]. Therefore, studying the coupling effect on vehicles under HPEMP can provide a reference for vehicular electromagnetic pulse protection technology and lay a theoretical foundation for improving the vehicle's anti-electromagnetic interference ability.…”

Section: Introductionmentioning

confidence: 99%

High-Power Electromagnetic Pulse Effect Prediction for Vehicles Based on Convolutional Neural Network

et al. 2022

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This study presents a prediction model for high-power electromagnetic pulse (HPEMP) effects on aboveground vehicles based on convolutional neural networks (CNNs). Since a vehicle is often located aboveground and is close to the air-ground–half-space interface, the electromagnetic energy coupled into the vehicle by the ground reflected waves cannot be ignored. Consequently, the analysis of the vehicle’s HPEMP effect is a composite electromagnetic scattering problem of the half-space and the vehicles above it, which is often analyzed using different half-space numerical methods. However, traditional numerical methods are often limited by the complexity of the actual half-space models and the high computational demands of complex targets. In this study, a prediction method is proposed based on a CNN, which can analyze the electric field and energy density under different incident conditions and half-space environments. Compared with the half-space finite-difference time-domain (FDTD) method, the accuracy of the prediction results was above 98% after completing the training of the CNN network, which proves the correctness and effectiveness of the method. In summary, the CNN prediction model in this study can provide a reference for evaluating the HPEMP effect on the target over a complex half-space medium.

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Shielding Effectiveness of Materials Under the Excitation of High-Power Microwave

Cited by 7 publications

References 17 publications

Shielding Performance of Materials Under the Excitation of High-Intensity Transient Electromagnetic Pulse

Shielding Performance of Materials Under the Excitation of High-Intensity Transient Electromagnetic Pulse

Recent Developments of Shielding Effectiveness for Electronics and Information Devices

High-Power Electromagnetic Pulse Effect Prediction for Vehicles Based on Convolutional Neural Network

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