双层屏蔽腔内线缆负载电磁耦合的EMT分析方法
An EMT Analysis Method for Calculating the Electromagnetic Coupling of Transmission Line Inside a Double-Layer Cavity
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摘要: 电磁拓扑分析方法将一个复杂系统的求解问题等效成许多子系统问题的求解,能够有效降低复杂电子系统电磁干扰问题求解的难度。本文针对双层屏蔽腔内辐射源对传输线电磁干扰求解问题,提出了一种计算腔内电偶极子辐射源对传输线负载电磁耦合的电磁拓扑分析方法。阐述了双层屏蔽腔内传输线耦合机理,建立了腔内传输线负载电磁干扰的电磁拓扑图和信号流图。根据腔体本征模理论、Bethe 理论以及BLT 方程,得到了传输线负载干扰电压。结果表明本文方法能够准确计算腔内干扰源对传输线负载干扰,且计算效率高,占用内存少。Abstract: The electromagnetic topological (EMT) analysis method can effectively reduce the difficulty of solving the electromagnetic interference problem of the complex electronic system by equipping the solving problem of a complex system with that of many subsystems. In order to handle the problem of electromagnetic coupling between radiation source and transmission line (TL) in a two-layer shielded cavity system, this paper develops an EMT analysis method to deal with the calculation of interference induced at the TL terminals. Firstly, we discuss the coupling mechanism of the TL in a double-layer shielded cavity. Then, the EMT diagram and network of the whole system are established with the presented approach. According to the cavity eigenmode theory, Bethe′s theory and BLT equation, the coupling interference voltage at the TL loads is obtained. The results illustrates that the proposed method possesses better efficiency and consumes less memory.
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期刊类型引用(6)
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