电波科学学报2025，Vol.40Issue(1)：96-103,8.DOI:10.12265/j.cjors.2024029
计算电大尺寸目标的新型多层快速物理光学高效算法
The novel multilevel fast physical optics efficient method for computing electrically large scatterers
摘要
Abstract
In order to compute electrically large scatterers rapidly and accurately with less computational cost a multilevel fast physical optics(MLFPO)method based on an octree multilevel structure and quadratic mesh technique is proposed in this work.The octree multilevel technique makes full use of parallel techniques to further accelerate the computation.Additionally,the quadratic mesh technique provides a better fit to the surface of convex scatterers and reduces the number of unknowns compared with planar triangular patches effectively.Furthermore,this work extends the application of the MLFPO method from PEC to complex multilayer coated targets.Numerical examples demonstrate that the mean error of the PO and MLFPO method is within 1.54 dB in the S,C,X,and Ku bands.Compared to the PO method in the commercial software FEKO,the computational speed of the MLFPO method increases more than 8 times and the computational storage reduces 98%.The MLFPO method reduces computational costs while ensuring calculation accuracy,making it an efficient method for analyzing the electromagnetic scattering problem of electrically large smooth convex scatterers.关键词
物理光学(PO)/多层加速技术/八叉树结构/二次曲面/多层涂覆反射系数/电大尺寸散射体Key words
physical optics(PO)/multilevel acceleration technique/octree structure/quadratic patch/multilevel coated reflection coefficient/electrically large scatterers分类
信息技术与安全科学引用本文复制引用
李潜龙,吴语茂,窦玉莹..计算电大尺寸目标的新型多层快速物理光学高效算法[J].电波科学学报,2025,40(1):96-103,8.基金项目
国家优秀青年科学基金(62022028) （62022028）
国家自然科学基金(62231021) （62231021）
国家自然科学基金面上项目(61971144) （61971144）
国家重点研发计划(2020YFA0711900,2020YFA0711901) （2020YFA0711900,2020YFA0711901）
