摘要
基于角点延迟的思想,研究了时域有限差分(FDTD)法中,两种在连接边界上引入平面波的方法——一维平面波推进法和解析法。仿真结果表明:一维平面波推进法与解析法同样有效;一维平面波推进法很大程度上抵消了FDTD法的数值色散误差,溢出波较少,而解析法出现了较多的溢出波;使用一维平面波推进法时,减小网格尺寸能够进一步减小溢出波。
In the finite difference time domain method （FDTD）, the one-dimensional plane wave advancing method and analytical method are studied based on the idea of corner points delay. The results show that the one-dimensional plane wave advancing method and analytical method are both effective; the former one can largely offset the inherent numerical dispersion error of FDTD, which leads to little spill wave, but a large spill wave appears in analytical method; and also that the spill wave can be further removed by decreasing the size of meshes.
出处
《电波科学学报》
EI
CSCD
北大核心
2011年第2期388-393,413,共7页
Chinese Journal of Radio Science
