针对汽车信号传输线在温度-频率变化下的信号传输性能问题,应用节点电压法建立环境温度下同轴电缆的等效热路模型,分析并得出信号传输线在焦耳热和环境温度共同影响下的温度分布。通过实例分析,揭示了信号传输线传输参数随温度-频率的变化规律。
For the analysis of signal transmission performance of automotive signal transmission lines in temperature-frequency change ,the equivalent thermal circuit model of the coaxial cable is set up by use of the node voltage method ,which takes environ-ment temperature into account .The temperature distribution of signal transmission lines in the combined effect of Joule heating and environment temperature is analyzed and obtained .Through the case analysis ,the change law of transmission parameters of signal transmission lines with temperature-frequency is revealed .