【摘要】 介绍了一种二维时域有限差分方法的亚网格技术 ,其中粗细网格的划分比为 2 .由于粗细网格的特殊排布 ,该方法可以应用于亚网格边界穿越介质的情形 .通过计算测试 ,粗细网格边界的反射系数小于 - 45dB ,所编程序具有很好的稳定性 .更多还原

【Abstract】 A subgridding algo rithm in FDTD with mesh refinement by a factor of two is presented. This algorit hm can be applied to the situation that the material surface traverses the coars e-fine boundary. The accuracy and stability of this algorithm are tested. The s cattering of an object with an electrically small groove and a coated airfoil is calculated to exemplify this algorithm.更多还原