摘要
为了准确求解交替方向隐式时域有限差分(Alternating Direction Implicit Finite-Difference Time-Domain,ADI-FDTD)方法实现理想电导体边界和理想磁导体边界的待求场分量系数,通过在获得该系数前应用理想导体边界条件,推导出了相应的修正系数.计算了单个金属立方体和对称的两个金属立方体的双站雷达散射截面.结果表明:理想导体边界作为理想导体表面,采用修正系数的计算结果与时域有限差分(Finite-Difference Time-Domain,FDTD)方法计算结果更为吻合;理想导体边界作为截断计算空间对称面,采用修正系数的计算结果与ADI-FDTD方法计算结果相同,与理论推导结论一致.
To obtain the coefficients of the unknown field components of perfect electric conductor(PEC)boundary and perfect magnetic conductor(PMC)boundary by accurately solving alternation direction implicit finite-difference time-domain(ADI-FDTD)method,the corresponding correction factors are derived by using the perfect conductor boundary conditions before obtaining the coefficients.The bistatic radar cross section(RCS)of a single metal cube and two symmetric metal cubes are computed respectively.To be concluded that,the results obtained by using correction factor are well coincided with that of FDTD by taking perfect conductor boundary as ideal conductor surface,as well as the results obtained by using correction factor are well coincided with that of ADI-FDTD by taking perfect conductor boundary as symmetry plane of truncated computing space,which are consistent with theoretical conclusions.
出处
《电波科学学报》
EI
CSCD
北大核心
2014年第5期988-993,共6页
Chinese Journal of Radio Science
基金
国家自然科学基金(No.60971041)
