diancichuanrao Analysis of electromagnetic crosstalk in parallel multi-conductor transmission lines of equal length Guo Hongtao Wu Qun Zhang Wenbin Department of Electronic and Communication Engineering, Harbin Institute of Technology, 92 Xidazhi Street, Harbin, 150001, China Tel: 0451-6413504 Email: qwu@public.hr.hl.cn Abstract Cable crosstalk is an important research topic in electromagnetic compatibility. The multi-conductor transmission line equation is an effective basic theory for solving crosstalk. Starting from the conductor transmission line equation, this paper derives the unit length electrical parameters and summarizes the characteristics of the multi-conductor transmission line equation in both time domain and frequency domain. 1. Introduction In modern society, cable crosstalk in electronic devices is an unavoidable problem. The development of digital communication equipment is towards large capacity, wide bandwidth and high frequency. The frequency of signals and clocks is constantly increasing. For the cables or links in such equipment, when the data transmission rate is increased, the high-order components of the digital signal spectrum will generate a large amount of electromagnetic radiation, thereby interfering with nearby data lines [1]. According to the specific actual situation, using the multi-conductor transmission line equation theory for analysis will find a satisfactory solution. The multi-conductor transmission line equation theory is also applicable to the analysis of crosstalk of twisted pair and microstrip lines. 2. Multi-conductor transmission line equation theory 1. Assuming that the transmission waveform is a TEM wave and the total current on each conductor is zero, there are three methods to derive the multi-conductor transmission line equation: integral form of Maxwell\'s equations; differential form of Maxwell\'s equations [2]; lumped parameter equivalent circuit [3]. Each of the three methods has its own advantages and disadvantages: the integral form has clear physical concepts, and in the derivation process, the unit length capacitance, inductance, conductance, impedance...
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