一种含同轴电缆的线束内部串扰高效分析方法

为了高效分析含同轴电缆的线束内部串扰，提出了一种新的简化电缆束模型的方法. 该方法把简化电缆束的过程分为两步:首先，为了解决同轴电缆编织屏蔽层难以仿真的问题，利用内外传输线转移矩阵简化同轴电缆，将含同轴电缆的电缆束转化为全由单芯线组成的三维电缆束模型；然后，使用等效线束法将全单芯线的电缆束进一步简化，减少需要分析的单芯线数量. 简化后的模型可用于任何三维电磁仿真软件中的电缆束内部串扰仿真分析，而无需考虑基于经典传输线理论的等效电路法的局限性. 将提出的方法与等效电路法分别应用于电缆束内部串扰的分析，两者的仿真结果一致性良好，说明文中提出的方法是准确可行的，能够实现含同轴电缆的线束内部串扰的高效分析.

An efficient method for analyzing crosstalk of coaxial cable bundles

In order to efficiently analyze crosstalk of coaxial cable bundles, a new equivalent method for simplifying the simulation model of coaxial cable bundles is proposed. This method divides the process of simplifying the cable bundle into two steps. First, in order to solve the problem that the braided shielding of the coaxial cable is too complicated to simulate, the internal and external transmission line (IETL) transfer matrix is used to simplify the coaxial cable, and the coaxial cable bundle is converted into a 3D cable bundle model composed of single core wires. Then, the equivalent cable bundle method (ECBM) is used to further simplify the full single-core cable bundle by reducing the number of single-core wires. The simplified model can be used for the internal crosstalk simulation of the cable bundle in any 3D electromagnetic simulation software without considering the limitations of the equivalent circuit method based on the classic multiconductor transmission line (MTL) theory. The proposed method and the equivalent circuit method are respectively applied to the simulation of the internal crosstalk of the cable bundle, and the simulation results are in good agreement, which shows that the method proposed in the article is accurate, and can be used to efficiently analyze the internal crosstalk of coaxial cable bundles.