单导体传输线与屏蔽电缆串扰问题的研究

采用时域BLT方程对单导体传输线和屏蔽电缆的串扰问题进行了研究。将单导体传输线和屏蔽电缆的串扰模型分解为内、外传输线系统,应用时域BLT方程对内、外传输线系统求解,分别得到屏蔽层和芯线上的电压、电流响应,内、外传输线系统通过转移阻抗联系起来。研究了不同频率正弦波激励时,同轴电缆和双芯屏蔽电缆屏蔽层和芯线终端的时域串扰响应。仿真结果表明同轴电缆和双芯屏蔽电缆芯线终端的串扰响应幅值随着激励源频率的增大而增大。

The study of Crosstalk between Single Wire and Shielded Cables

The Baum-Liu-Tesche (BLT) equations are presented in this paper for solving the crosstalk problem between a single wire and shielded cables. The crosstalk model of single wire and shielded cables is made up of inner and outer transmission line systems, the time-domain BLT equations are used to get the voltage and current response of shield layer and inner conductor, the inner and outer transmission line systems are connected by transfer impedance. The time-domain crosstalk response of the termination of shielded layer and inner conductor of coaxial cable and dual-core shielded cable is studied. The simulation results show that the amplitude of coaxial cable and dual-core shielded cable termination crosstalk response increases as the excitation source frequency increases.