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将频域BLT方程与FDTD方法结合起来对包含非均匀线缆的耦合传输线时域响应进行了分析。该方法将非均匀部分线缆从传输网络中独立出来,采用FDTD离散进行时域分析,然后变换到频域与BLT方程混合求解整个线缆网络的电压、电流响应。一方面避免了用单一的时域有限差分算法对传输网络进行整体离散时所带来的高计算量、高内存占用比问题;另一方面将作均匀线段当成节点处理,为频域方法求解含非均匀线的传输网络响应,提供了一种新的思路。仿真结果也表明了该方法的有效性。
The frequency domain BLT equation and the FDTD method are combined to analyze the time domain response of the coupled transmission line including the non-uniform cable. In this method, the non-uniform part of the cables is separated from the transmission network. FDTD discrete time-domain analysis is used to transform the frequency-domain and BLT equations to solve the voltage and current responses of the entire cable network. On the one hand, it avoids the problem of high computational complexity and high memory occupation ratio when the transport network is separated by a single finite-difference time-domain algorithm. On the other hand, it treats uniform line segments as nodes, Non-uniform line transmission network response, provides a new way of thinking. Simulation results also show that the method is effective.