摘要
本文提出了一种新的混合算法,该算法将时域有限差分方法(FDTD)和时域物理光学方法(TDPO)相结合,用于计算复杂组合体目标电磁散射特性。本文通过对FDTD/TDPO混合方法理论推导,建立了一种三角面元的快速FDTD网格建模方法。将FDTD方法计算出的电小目标的近散射场,用基尔霍夫面积分方法顺序外推到电大目标的表面三角面元上,然后用TDPO方法近似积分计算出远区的散射场。相对于传统方法,该算法在计算复杂组合体目标电磁散射特性时,具有计算效率高,所需内存小的优点。
This paper puts forward a new modified hybrid algorithm,which based on the FDTD（ finitedifference time-domain） method and TDPO（ Time-Domain Physical-Optical） method,to calculate the complex target scattering characteristics. An approach of fast FDTD mesh based on Triangle-Patch element is founded by expounding the theoretical derivation of FDTD/TDPO hybrid approach. Far-Field Scattering can be calculated by using the TDPO approximate integration method when the Near-Field Scattering of electrically small size target which is calculated with FDTD method can be sequential deduced by using Kirchhoff surface integral method and converted to Triangle-Patch element of electrically small size target. Compared with traditional methods,the hybrid approach has high computation efficiency and small memory requirement when it is used to calculate the combination complicated target electromagnetic scattering.
出处
《中国电子科学研究院学报》
北大核心
2017年第6期620-625,共6页
Journal of China Academy of Electronics and Information Technology
