摘要
在通信电缆的结构设计中,一次传输参数(有效电阻、电感、电容、绝缘电导)的准确计算至关重要。对称电缆的电磁场通常情况下分布既不对称也不规则,因而无法找到准确的解析式。笔者利用有限元法对孤立线对、四对非屏蔽超五类电缆进行了一次传输参数数值计算,然后通过一次传输参数计算出二次传输参数,最后将部分计算结果与实际测试结果进行了对比,二者结果比较吻合。实践证明,利用有限元法计算对绞电缆的一次传输参数是可行的。
The accuracy in calculating primary transmission parameters（ effective resistance, inductance, capacitance and insulation conductance） is very important for the design of cable construction. For symmetrical cables, it is hard to find an accurate analytical formula because the EM field distribution is neither symmetrical nor regular. Therefore the author calculated the primary transmission parameters of signle pair and 4-pair unscreened category 5 ＋ cables using FEM and calculated the secondary transmission parameters from the primary transmission parameters. The comparison between some of the results and measurements indicated good coherence. It has been demonstrated by practice that it is feasible to calculte the primary transmission parameters of paired cables using FEM.
出处
《电线电缆》
2007年第5期10-15,共6页
Wire & Cable
关键词
有限元法
通信电缆
一次传输参数
二次传输参数
计算中应用
FEM
communication cable
primary transmission parameters
secondary transmission parameters
application in calculation
