Z变换在磁化等离子体电磁脉冲传播时域分析中的应用

Time domain analysis of electromagnetic pulse propagation in magnetized plasma using Z transforms

通过Z变换的方法,将与频率有关的磁化等离子体的介电常数由频域变换到Z域,推导了Z变 换形式的时域有限差分法计算式,模拟了电磁脉冲在磁化等离子体中的传播。经过离散傅里叶变换,给出了电 磁波通过磁化等离子体后的反射系数和透射系数与频率的关系。还给出了模拟结果和理论值的对比。结果表 明,Z变换算法的模拟结果比卷积分更接近理论值,

The propagation of electromagnetic pulses in uniform magnetized plasma is studied using the finite-difference time-domain (FDTD) method by means of Z transforms. The Z transform formulation of FDTD method is derived. The reflection and transmission coefficients are computed for electromagnetic waves through the magnetized plasma layer by discrete Fourier transform. The comparison of numerical results with analytical values is presented. It indicates that simulation results by Z transform method are closer to analytical values than recursion convolution algorithm.