摘要
利用快速傅里叶变换求解分段线性宽角抛物方程的方法,研究了单个障碍物和多个障碍物对海面上方蒸发波导中电磁波传播的影响,将光滑海面上有障碍物与无障碍物的蒸发波导中电磁波传播结果进行了比较和讨论。结果表明:随着障碍物的存在及传输距离和障碍物高度的增加,蒸发波导中电磁波路径传输损耗增大,这对评估海面上空含舰船和岛屿时蒸发波导的传输特性有重要意义。
The influence of the electro duct with the single and multi-obstacl the piecewise-linear wide angle para magnetic wave propagation in the evaporation es above the sea surface is studied by solving bolic equation using fast-Fourier transform method. The comparison of the electromagnetic wave propagation above the smooth sea surface with and without obstacles is presented and discussed. It is shown that the propagation loss of electromagnetic wave in evaporation duct increases with the presence of the obstacle, the propagation path and the height of the obstacle, which is important for evaluating the characteristics of wave propagation with the ship and the island above the sea surface in the evaporation duct.
出处
《电波科学学报》
EI
CSCD
北大核心
2011年第4期621-627,821,共8页
Chinese Journal of Radio Science
基金
中央高校基本科研业务费专项资金
国家自然科学基金项目(60971067)
关键词
蒸发波导
宽角抛物方程
障碍物
分段线性变换法
传输损耗
evaporation duct
wide-angle parabolic equations
obstacles
the piecewise-linear transformation method
propagation loss
