Improvement of shielding effectiveness of airborne digital equipment

doi:10.37188/OPE.20233111.1660

CIOMP OpenIR

	Improvement of shielding effectiveness of airborne digital equipment
	S. Han; S. Han; L. Xu; X. Wang and L. Liu
	2023
发表期刊	Guangxue Jingmi Gongcheng/Optics and Precision Engineering
ISSN	1004924X
卷号	31 期号:11 页码:1660-1671
摘要	To reduce the electromagnetic radiation emission intensity of airborne digital equipment，the spectrum of the digital signal is analyzed，revealing that the fundamental wave and its high-frequency harmonics are the sources of electromagnetic radiation emissions. Next，the rationale of shielding layer to suppress electromagnetic radiation is analyzed. The results indicate that the high-conductivity non-magnetic shielding layer has a good shielding effect on the electric field and high-frequency magnetic field. The influence of the gap on the shielding effectiveness of the shield is analyzed again，and a new method of double-layer fill shielding is proposed and validated. Then，the absorption loss of the electromagnetic wave is analyzed，and a new method for improving the shielding effectiveness of twisted-pair shielded cable/coaxial cable double-layer shielding is proposed and validated. Finally，an actual engineering project is considered as an example. The project equipment satisfies the GJB151B-2013 RE102 requirements and still interferes with the Beidou equipment Star（BDS）Searching and positioning. The electromagnetic compatibility is improved using the proposed method. After the improvement，the emission intensity of electromagnetic radiation is significantly reduced，by 12 dBμV/m on average. The ground and flight experiments verify that the integral power of the BDB1 and BDB3 frequency points is increased by 0. 59 and 1. 84 dBm，respectively，under normal operating conditions，and the number of BDS searching satellites is increased from ≤3 to ≥9，the BDS can operate normally. © 2023 Chinese Academy of Sciences. All rights reserved.
DOI	10.37188/OPE.20233111.1660
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收录类别	ei
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文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/67516
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	S. Han,S. Han,L. Xu,et al. Improvement of shielding effectiveness of airborne digital equipment[J]. Guangxue Jingmi Gongcheng/Optics and Precision Engineering,2023,31(11):1660-1671.
APA	S. Han,S. Han,L. Xu,&X. Wang and L. Liu.(2023).Improvement of shielding effectiveness of airborne digital equipment.Guangxue Jingmi Gongcheng/Optics and Precision Engineering,31(11),1660-1671.
MLA	S. Han,et al."Improvement of shielding effectiveness of airborne digital equipment".Guangxue Jingmi Gongcheng/Optics and Precision Engineering 31.11(2023):1660-1671.

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