电波科学学报2019，Vol.34Issue(1)：83-90,8.DOI:10.13443/j.cjors.2018083101
矩量法-物理光学混合算法计算多尺度复合目标电磁散射场
The MoM-PO hybrid method for calculating the scattered field of multi-scale composite targets
摘要
Abstract
Method of moments (MoM) and physical optics (PO) hybrid algorithm is the main method for calculating scattered field of electrically mid-scale and multi-scale target. When calculating the coupling effect between MoM region and PO region, we have to judge whether the PO elements is illuminated. Time complexity of shadowing algorithm based merely on CPU is O (N2) where N represents to the patch number of the target, which increases sharply with the increase of patch number. In this paper, we use GPU rendering and zbuffer to accelerate the process of lit judge. The time consuming of shadowing process has no relation with increasing patch number and has a better performance especially when the patch number reaches 105magnitude. We apply MoM-PO method to the scattered field calculation from the complex target combined with rough surface. Compared with the multilevel fast multipole algorithm (MLFMA) and PO method, this hybrid method achieves high precision. The hybrid algorithm has obvious advantage over single method algorithm.关键词
物理光学/矩量法/图形渲染/亮区判断/粗糙面Key words
physical optics/method of moments/graphic rendering/lit judgment/rough surface分类
信息技术与安全科学引用本文复制引用
吴安雯,吴语茂,杨杨,张楠..矩量法-物理光学混合算法计算多尺度复合目标电磁散射场[J].电波科学学报,2019,34(1):83-90,8.基金项目
国家自然科学基金 (11571196) （11571196）
科学挑战计划 (JCKY2016212A502) （JCKY2016212A502）
