摘要
对抛物方程中的伪差分算子进行Feit-Fleck宽角近似处理,分析了这种近似所带来的误差;详细阐述了阻抗边界条件下求解这种宽角抛物方程的分步傅立叶变换方法,并以此计算了海平面上电波传播情况,与窄角抛物方程及几何光学双射线模型的计算结果进行比较,说明了这种宽角抛物方程在阻抗边界条件下计算较大仰角电波传播问题是可行的。
The pseudo-differential operator of parabolic equation is approximated to a wide-angle form by the Felt-Fleck method. The error brought by this approximation is analyzed. A split-step Fourier transform method for obtaining the solution of this wide-angle parabolic equation under impedance boundary condition is demonstrated in detail, and an example of radio propagation over the sea surface is calculated. Compared with a narrow-angle parabolic equation and the two-ray geometrical optics model, the simulation results show the validity of this wide-angle parabolic equation to deal with big elevation radio propagation problems under impedance boundary condition.
出处
《电波科学学报》
EI
CSCD
北大核心
2005年第4期500-504,共5页
Chinese Journal of Radio Science
关键词
抛物方程
宽角
阻抗边界条件
分步傅立叶变换
parabolic equation, wide-angle, impedance boundary condition, splitstep Fourier transform
