Numerical simulation of non-linear transmission line
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摘要: 给出了模拟交叉耦合磁饱和非线性传输线的数值模拟方法,算法基于传输线各节点的时域差分方程组进行步进迭代,其中利用J-A模型描述传输线中铁氧体磁芯的非线性磁化行为。根据节点电路方程推导了非线性传输线色散关系,设计了输出频率为300 MHz的交叉耦合磁饱和非线性传输线,利用本数值模拟方法对交叉耦合磁饱和非线性传输线的物理过程进行了分析,在充电电压达到30 kV时获得了频率303 MHz、峰峰值不小于40 kV的高压射频脉冲输出。Abstract: This paper deals with the numerical simulation of magnetic nonlinear transmission line(NLTL) with cross-linking element. The simulation is based on the iteration of voltage and current in NLTL element which is described in the time-domain differential equation. The hysteretic properties is studied by the J-A model. The dispersion formula is derived from circuit equation, and a magnetic NLTL is designed with an operation frequency of 300 MHz. By this numerical simulation, the peak-peak voltage of output pulses is on load no less than 40 kV, center frequency 303 MHz with voltage of feeding pulse of 30 kV.
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