摘要
本文针对散射问题中时域近场一远场转换问题,探讨了两种新的算法.其一是采用Stratton-Chu散射场的积分表示式,由表面感应流直接求时域散射远场.其二是采用拉氏变换和卷积的方法,导出求解3-D和2-D时域散射远场形式上统一的公式.文中以规则形体为计算实例,验证了算法的可行性.
Focused on the methods of near-zone to far-zone field transformation in solvingscattering problem by FDTD method,two new approaches are presented in this paper. One is directly obtaining scattered far field by adopting Stratton-Chu integral formula. Another method isapplying Laplace transformation and convolution technique which leads to a unified formula forscattered far field in time domain for both 2-D and 3-D scattering problems,and makes 2-D problem a special case of 3-D problem. Numerical results of simple scatterer are given to show the validation of the both algorithms.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1997年第3期121-124,共4页
Acta Electronica Sinica
关键词
时域散射
FDTD
电磁散射
散射场
近场-远场转换
Transient scattering, FDTD method, Time domain near-zone to far--zone transformation