【摘要】 通信系统中电触点不良会造成对信号传输的影响。根据电接触理论结合高频传输的特点， 建立了电触点的物理模型， 研究发现当接触电阻大于传输线特性阻抗的两倍时， 接收端得到的信号幅度将减小一半以上（Ａ＜ １／４）， 从而将产生误码， 因而应尽可能减小接触阻抗更多还原

【Abstract】 ELECTRONIC COMPONENTS & MATERIALS(China) ,Vol.18,No.5,P.37 38(Oct.1999) .In Chinese. Poor contacts impair signal transmission.A physical model of electric contacts is established based on the electric contact theory and the transmission characters of the signal at high frequency.When contact resistance is two times higher than the transmission line characteristic impedance,the amplitude of received signal at the terminal may reduce by more than half ( A<1/4 ).Therefore,the error codes occur.It is necessary to reduce contact impedance.(3 refs.)更多还原