Citation: | LIU Lina, ZHU Feng, XU Changwei, NIU Dapeng, QIU Riqiang. Implementations of perfect conductor boundaries for accurate ADI-FDTD method[J]. CHINESE JOURNAL OF RADIO SCIENCE, 2014, 29(5): 988-993. doi: 10.13443/j.cjors.2013073001 |
Implementations of perfect conductor boundaries for accurate ADI-FDTD method
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.