传输线中脉冲信号传输特性的联合时频分析

Joint time-frequency analysis of pulse propagation characteristics in transmission lines

用联合时频分析方法将一维时域或频域脉冲信号扩展到时间 -频率的二维平面 ,通过时间窗、频率窗和 Wigner- Ville分布的时频平面对矩形和高斯脉冲信号在传输线 (双导线和同轴线 )中的传输瞬态特性进行比较分析对比。联合时频分析可以更直观、更全面地了解脉冲信号在传输线任意时间和任意位置的瞬态变化。

The transient characteristics of ultrafast rectangular and Gaussian pulses in twin wires and coaxial cable are observed and compared through time-window, frequency-window and Wigner-Ville distribution's time-frequency plane. And in this process the joint time-frequency analysis is used to expand one-dimension time domain or frequency domain pulse signals into two-dimension plane of time-frequency. The joint time-frequency analysis provides more direct and comprehensive knowledge of the transient variation of pulse signals at any time and any point of the transmission line.