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提出了一种新的有效求解端接频变负载的时域有限差分法(FDTD).该方法将频域导纳经矢量匹配后以有理式表示,通过逆傅里叶变换将其转换到时域,基于分段线性递归卷积法,推导出该导纳两端的电压和电流关系,将其代入到传输线FDTD模型中,得到了求解端接频变负载多导体(MTL)传输线FDTD的一般公式.对一典型电路进行了仿真,和以状态变量法求解任意负载的结果进行了对比,两者基本重合,说明该方法用来求解频变负载是有效的.
A new finite-difference time-domain finite difference method (FDTD) is proposed to effectively solve the frequency-dependent loading in termination. The proposed method takes the frequency-domain admittance as a rational representation after vector matching and transforms it to Based on the piecewise linear recursive convolution method, the voltage and current relationship at both ends of the admittance is deduced and substituted into the FDTD model of transmission line. The general formula for solving FDTD of terminated MTL transmission line is obtained. The simulation of a typical circuit is compared with the result of state variable method to solve any load, which shows that the method is effective to solve the frequency - dependent load.