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利用坐标系转换矩阵给出实验室坐标系中饱和磁化铁氧体的频域磁导系数张量,再通过频域到时域的转换关系jω→?/?t得到一个二阶微分方程形式的时域本构关系.然后采用Newmark方法求解时域本构关系从而给出一种适用于处理任意磁化方向铁氧体电磁问题的Newmark时域有限差分算法.利用此算法计算了饱和磁化铁氧体层的反(透)射系数和饱和磁化铁氧体球的后向雷达散射截面,所获得的结果验证了此算法的正确有效性.
The frequency-domain permeability coefficient tensor of the saturated magnetized ferrite in the laboratory coordinate system is given by using the coordinate system transformation matrix, and then a second-order differential equation form is obtained by the conversion relation between frequency domain and time domain jω →? /? T Then the Newmark method is used to solve the time-domain constitutive relation to give a Newmark finite difference time-domain method which is suitable for dealing with ferrite electromagnetic problems with arbitrary magnetization direction. By using this algorithm, the saturation magnetized ferrite The anti-transmission coefficient of the layer and the backward radar cross-section of the saturated magnetized ferrite sphere validate the correctness of this algorithm.