电子设备贯通导线的电磁耦合时域分析算法

doi:10.3969/j.issn.1001-506X.2020.08.05

Abstract

Abstract:

At present, the numerical methods are lack seriously which are used for the electromagnetic coupling analysis of electronic device with penetrated wire. Therefore, an efficient time domain hybrid method is presented consisting of finite difference time domain (FDTD) method, transmission line (TL) equations and Norton theory to solve the electromagnetic coupling problem of electronic device with penetrated wire. In this method, the penetrated wire of electronic device is divided into external and internal transmission lines according to the shielded enclosure of device firstly. Then, the FDTD method combined with the TL equations is used to build the electromagnetic coupling models of external and internal transmission lines and obtain the transient responses on the lines, respectively. Finally, the equivalent circuit model of the penetrated wire is established by the Norton theory, which can solve the impedance mismatch between external and internal transmission lines, and achieve the transmission of interference signals on the penetrated wire. The accuracy and efficiency of the presented method are verified via the numerical simulations of electromagnetic coupling of the penetrated wire in the free space and shielded cavity by comparing with the traditional FDTD method.

Key words: electronic device, penetrated wire, finite difference time domain (FDTD) method, transmission line equation, Norton theory

CLC Number:

TM15

Zhihong YE, Yanchao SHI, Jianjian ZHOU. Time domain analysis algorithm of electromagnetic coupling of penetrated wire connecting to electronic device[J]. Systems Engineering and Electronics, 2020, 42(8): 1673-1678.

Figures/Tables 12

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Table 1

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References 25

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算法	网格数	计算时间/min
FDTD方法	3.2×10⁷	39
时域混合算法	2.4×10⁷	15

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Time domain analysis algorithm of electromagnetic coupling of penetrated wire connecting to electronic device

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