降低连接器内电磁干扰的方法分析

基于对任一接插件的干扰只来自最邻近接插件的假设,对连接器内部的电磁干扰建模,模型内接插件间的互耦电容用矩量法进行计算,根据模型的特点采用三角函数做匹配函数简化了计算过程并提高了计算精度.求出敏感接插件周围的接插件全部为信号线时的单位长度参数,不同状态的实现只需通过负载的调节即可,使对不同连接的模拟变得简单易行.对什么时候会在敏感件上产生最大和最小的干扰,以及周围信号的多少对干扰的影响都进行了讨论,以S参数和时域波形的形式给出模拟结果.模拟对正确地连接接插件,降低相互干扰有参考价值.

Analysis of reduce crosstalk in connector

Base on the assumption that external disturbance to a certain pin is mainly caused by the nearest surrounding pins, a simulation model of crosstalk is presented in this paper. By employing the method of moment with harmonic series expansion functions, the capacitance of connector is calculated. All the surrounding pins are simply treated as signal pins regardless whether they are shorted or opened. Interference voltages on the sensitive pin are given in frequency domain and time domain for the two special states, results are valuable for the correct usage of electric connectors.