同轴电缆串扰的测试与分析

摘要

This paper analyzed the crosstalk of coaxial cables, designed the experimental program, made the experimental device, and tested impacts of relevant parameters on crosstalk in time domain and frequency domain respectively.The data showed that crosstalk voltage decreased as spacing increased between cables or the height above ground of cables, and at low frequencies disturbed cable shield should be grounded at one end and at high frequencies disturbed cable shield should be grounded at both ends, and crosstalk shocked at high frequencies.The experimental results showed good consistency with theoretical analysis, so this conclusion should be helpful for our practical cabling.%本文分析同轴电缆间的串扰问题,并设计了实验方案,制定实验装置,在频域和时域下测量各相关参数对串扰的影响,得出串扰随着电缆间距的变大而减小,随着电缆离地高度的增加而增大,在低频时受扰电缆的屏蔽层应单端接地,高频时屏蔽层应双端接地,而且在高频时串扰有震荡趋势.实验结果与理论分析基本一致,此结论对实际中电缆布线可供参考.