电大凸目标电磁散射的数值路径变换算法研究
发布时间：2018-10-20 19:51
【摘要】：给出了基于Fock电流和增量长度绕射系数技术(Incremental Length Diffraction Coefficients,ILDC)得到的三维凸圆柱上的高频散射场的表达式,应用路径变换法和数值最速下降路径(Numerical Steepest Descent Path,NSDP)方法计算基于Fock电流的高振荡积分,得到散射场.数值算例显示,使用这一方法计算高频散射场,可以实现在不同频段的入射波下计算时间与频率无关.并给出一种基于测地线性质的爬行波寻迹算法,具有较高的精度和更高的计算效率,适用于任意光滑模型上爬行波的寻迹.
[Abstract]:The expression of high frequency scattering field on a three dimensional convex cylinder based on Fock current and increment length diffraction coefficient technique (Incremental Length Diffraction Coefficients,ILDC) is given. The high oscillation integral based on the Fock current is calculated by using the path transformation method and the numerical maximum descent path (Numerical Steepest Descent Path,NSDP) method, and the scattering field is obtained. Numerical examples show that using this method to calculate the high frequency scattering field, it can be realized that the calculation time is independent of the frequency under the incident wave in different frequency bands. An algorithm based on geodesic property for crawling wave tracing is presented, which has higher accuracy and higher computational efficiency. It is suitable for crawling wave tracing on arbitrary smooth model.
【作者单位】： 复旦大学信息科学与工程学院电磁波信息科学教育部重点实验室;
【基金】：国家自然科学基金(61401103) 上海国家自然科学基金(14ZR1402400) 毫米波国家重点实验室(K201505)
【分类号】：TN011
，
本文编号：2284213
[Abstract]:The expression of high frequency scattering field on a three dimensional convex cylinder based on Fock current and increment length diffraction coefficient technique (Incremental Length Diffraction Coefficients,ILDC) is given. The high oscillation integral based on the Fock current is calculated by using the path transformation method and the numerical maximum descent path (Numerical Steepest Descent Path,NSDP) method, and the scattering field is obtained. Numerical examples show that using this method to calculate the high frequency scattering field, it can be realized that the calculation time is independent of the frequency under the incident wave in different frequency bands. An algorithm based on geodesic property for crawling wave tracing is presented, which has higher accuracy and higher computational efficiency. It is suitable for crawling wave tracing on arbitrary smooth model.
【作者单位】： 复旦大学信息科学与工程学院电磁波信息科学教育部重点实验室;
【基金】：国家自然科学基金(61401103) 上海国家自然科学基金(14ZR1402400) 毫米波国家重点实验室(K201505)
【分类号】：TN011
，
本文编号：2284213
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