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

Yan, Zhiyang; Qin, Fangfang; Cai, Jinliang; Zhong, Shouhong; Lin, Jiangchuan

doi:10.1109/access.2021.3069328

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…SE is normally expressed in decibels and is related to many variables, including material type, property, thickness, distance, and frequency. SE is generally defined as the logarithmic ratio of the amplitude of the electric field and magnetic field in an unshielded area to the amplitude of the time-harmonic electric field and magnetic field in the same but shielded area at any position, or the logarithmic ratio of the time-averaged power density in an unshielded area to that in the same but shielded area [31], as shown in Equations ( 9) and (10). Because electric and magnetic fields cannot be considered separately, Equation ( 9) is mainly applied for low-frequency electric and magnetic fields, and Equation (10)…”

Section: Fundamentals Of Sementioning

confidence: 99%

“…Ming et al [9] used time-domain analysis techniques to analyze SE against EMPs. Yan et al [10] conducted experiments to determine the SE of materials under a broadband transient EMP. For transportation vehicles, such as automobiles, vessels, and aircrafts, high-transmittance external glass is an indispensable material; however, such glass materials are a weak point in protection from EMPs.…”

Section: Introductionmentioning

confidence: 99%

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Study on Shielding Effectiveness of High Transmittance Coating Film Glasses against Electromagnetic Pulse

Cheng,

Chen,

Lin

et al. 2023

Technologies

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This study investigated the shielding effectiveness (SE) of glass materials with conductive coatings by establishing a 3000 × 3000 × 3000 mm electromagnetic pulse (EMP)—shielded room according to the EMP shielding requirements in the US military standard MIL-STD-188-125-1. The EMP SE of conductive-coated glass samples was measured and verified with the broadband EMP conditions of 10 kHz∼1 GHz. The conductive thin film coating on the glass was made by mixing conductive materials, including In2O3, SnO2, Ta2O5, NbO, SiO2, TiO2, and Al2O3, at different ratios. The mixed solutions were then coated onto the glass targets to facilitate conductive continuity between the conductive oxides and the shielding metal structure. The glass samples had dimensions of 1000 × 600 mm, which had electrolytic conductivity σ = 4.0064 × 103∼4.7438 × 103 (S/cm), 74∼77% transmittance, and 6.4∼6.8 Ω/□ film resistance. The experimental results indicated that the glass had SE of 35∼40 dB under 1 GHz EMP, satisfying the US National Coordinating Center for Communications’ Level 3 shielding protection requirement of at least 30 dB. The glass attenuated energy density by more than 1000 times, which is equivalent to shielding over 97% of EMP energy. Accordingly, the glass materials can be used as high-transmittance conductive glass for windows of automobiles, vessels, and aircrafts to protect from EMPs.

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Section: Fundamentals Of Sementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on Shielding Effectiveness of High Transmittance Coating Film Glasses against Electromagnetic Pulse

Cheng,

Chen,

Lin

et al. 2023

Technologies

View full text Add to dashboard Cite

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“…Thus, the protection of control system becomes a main concern for aircraft manufacturers. Many researches focus on the reinforcement of electronic controller by using the shielded cables, shielded connectors, shielded cabinet and filters [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Experimental Study of the Field Distribution of Engine for Electromagnetic Pulse

et al. 2022

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The protection of electromagnetic pulse (EMP) is important for aircraft due to vulnerable electronic equipments are installed. The control box of engine is also suffering from EMP and seldom studied. Meanwhile, most of work related to EMP protection focus on shielding design. Few works consider the effect of engine shell. The field distribution induced by EMP and its influences on the controller layout are unaddressed. This work will comprehensively investigate the field distribution characteristics of an engine under EMP, which is studied by simulating and experimenting methods. The transmission line matrix (TLM) is used to simulated field distribution of the bounded wave simulator and aero-engine, which provides better placement for equipment under test in the simulator. The field differences of bounded wave simulator and plane wave have been analyzed by using CST software. The feasibility of plane excitation instead of bounded wave simulator model excitation is checked, which has been verified by using the engine model. Then, the distribution characteristics of transverse and longitudinal fields surrounding the aero-engine are obtained, and the surface current distribution of the engine is also obtained in the simulation. The aero-engine simulation is excited by bounded wave simulator under CST software. According to the corresponding monitoring points, the simulated field distribution characteristics are verified by using the largely bounded wave simulator. Finally, the influence of field distribution on the layout of the engine electronic control system is analyzed, which provides a reference for the anti-electromagnetic pulse design of the engine electromagnetic controller.INDEX TERMS Electromagnetic pulse (EMP), Bounded wave simulator, Placement for equipment under testing, Field distribution of engine.

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Response Characteristics of Gas Discharge Tube to High-Power Microwave

et al. 2021

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Gas discharge tube (GDT), as an important protective device, has been developed and employed for the protection of circuit against high-power electromagnetic energy. Accurate description of the protective property of GDT is critical for its practical applications. However, under the excitation of high-power microwave (HPM), how the GDT will respond and whether the GDT can still exhibit protective performance remain unclear. Herein, the response characteristics of GDT to HPM were studied in this article. With the increment of excitation voltage, the response time of GDT decreases exponentially, and eventually reaching about 10 ns. The suppression ratio to HPM energy can attain 90%. The dynamic breakdown voltage and arc-mode voltage continuously increase as the excitation voltage is increased. Specifically, the arc-mode voltage nearly exhibits a linearly increasing trend. Moreover, the response property of GDT to HPM was simulated by using a PSpice model. The simulations are in good agreement with the experimental results, indicating the model can be used for predicting the behaviors of GDT under the excitation of HPM.

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

Cited by 4 publications

References 30 publications

Study on Shielding Effectiveness of High Transmittance Coating Film Glasses against Electromagnetic Pulse

Study on Shielding Effectiveness of High Transmittance Coating Film Glasses against Electromagnetic Pulse

Simulation and Experimental Study of the Field Distribution of Engine for Electromagnetic Pulse

Response Characteristics of Gas Discharge Tube to High-Power Microwave

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