基于链路参数的屏蔽双绞线串扰预测模型  

CROSSTALK PREDICTION MODEL FOR SHIELDED TWISTED PAIR BASED ON CHAIN PARAMETER

作　　者：石旭东 董小东 张和茂 李晓露 范玲 Shi Xudong;Dong Xiaodong;Zhang Hemao;Li Xiaolu;Fan Ling(College of Electronic Information and Automation,Civil Aviation University of China,Tianjin 300300,China;Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 201324,China)

机构地区：[1]中国民航大学电子信息与自动化学院,天津300300 [2]上海飞机制造有限公司,上海201324

出　　处：《计算机应用与软件》2021年第9期72-77,145,共7页Computer Applications and Software

基　　金：国家商用飞机制造工程技术研究中心创新基金(COMAC-SFGS-2018-38);中央高校基础研究课题(3122018D003);天津市高等院校创新团队培养计划项目(TD13-5071)。

摘　　要：针对机载屏蔽双绞线与相邻线缆之间存在串扰的问题,提出基于链路参数的屏蔽双绞线串扰预测模型。在考虑屏蔽层转移阻抗的基础上推导出屏蔽双平行线的多导体传输线方程;将非均匀的屏蔽双绞线等效为多个扭绞级联,每个扭绞进一步简化为多段均匀传输线级联;使用级联传输线理论求得总的链路参数矩阵,进而得到单根线缆对屏蔽双绞线串扰模型。该模型求解结果与CST仿真结果对比表明,两者串扰随频率变化趋势一致,对串扰最大值的预测一致。实验结果表明,模型能有效预测串扰最大值。Aiming at the problem of crosstalk between aircraft cables,a shielded twisted pair crosstalk prediction model based on chain parameter is proposed.The multi-conductor transmission line equation for shielding double parallel lines was derived,in which the shield transfer impedance was considered;the in-homogeneous shielded twisted pair was divided into many homogeneous shielded parallel lines.Finally,chain parameter matrix was obtained based on cascaded transmission line theory,and the shielded twisted pair crosstalk prediction model was obtained.The proposed crosstalk prediction model has been proved to be reliable by comparing with CST simulation results and experimental results.The experimental results show that the model can effectively predict the maximum crosstalk.

关 键 词：串扰 屏蔽双绞线 转移阻抗 链路参数 级联传输线 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]