机载线缆间的串扰耦合分析  

Crosstalk Coupling Analysis Between Airborne Cables

作　　者：陆晓钰 周香[1] 王伟科[1,2] Lu Xiaoyu;Zhou Xiang;Wang Weike

机构地区：[1]东南大学 [2]中国航空综合技术研究所

出　　处：《安全与电磁兼容》2023年第2期34-37,共4页Safety & EMC

基　　金：航空科学基金(201902069001)。

摘　　要：串扰是机载设备间互联线缆干扰耦合的重要因素。以混合模S参数为基础,建立单线-双绞线模型以模拟机载设备之间的动力线缆对信号线产生的串扰耦合。在此模型基础上提出串扰耦合测试方案,搭建串扰耦合测试系统,并根据测试获得的耦合系数评估单线-双绞线线间串扰耦合强弱。通过测试比较,对影响因素进行分析,结果表明,距地高度对线间串扰影响不大,线间距对线间串扰耦合影响显著,因此在条件允许下尽可能增加设备间互联线缆的间距可有效抑制串扰耦合。Crosstalk is an important factor of interference coupling of interconnected cables between airborne equipment.Based on the mixed mode S parameters,a single-wire to twisted-pair model was established to simulate the crosstalk coupling between power line and signal line of airborne equipment.Based on this model,a crosstalk coupling test scheme is proposed,and a crosstalk coupling test system is built.The crosstalk coupling between single-wire to twisted-pair is evaluated according to the coupling coefficient obtained by the test.The results show that the distance to ground has little effect on the crosstalk,while the distance between two lines has a significant effect on the crosstalk coupling.Therefore,increasing the distance between interconnected cables between devices can effectively reduce the crosstalk coupling if conditions allow.

关 键 词：串扰 混合模S参数 传输线理论 信号完整性 电磁兼容 

分 类 号：V24[航空宇航科学与技术—飞行器设计] TN03[电子电信—物理电子学]