基于抛物方程的蒸发波导传播研究  

Evaporation Duct Based on Parabolic Equation

作　　者：李雪萍[1] 张瑜[1] 

机构地区：[1]河南师范大学物理与信息工程学院

出　　处：《河南师范大学学报（自然科学版）》2010年第5期77-80,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：国防重点实验室基金(51477050101 DZ3201)

摘　　要：蒸发波导是近海面一种常见的异常大气折射结构,它能够部分陷获电磁波,从而改变电磁波传播特征,为实现电波超视距传播提供条件.使用分步傅里叶算法对电磁波传播的抛物方程模型进行求解,然后基于不稳定层、稳定层和中性层的修正折射率剖面,通过仿真得到了蒸发波导环境中不同层结条件下的空间场分布.Evaporation duct is a familiar structure of abnormal atmosphere refractivity near the sea surface.It can partly trap electromagnetic waves and change the propagation characteristics which is necessary to achieve the over-the-horizon electromagnetic waves propagation.The distribution of electromagnetic field of different stability under Evaporation duct is given,based on the split-step Fourier algorithm of parabolic equation,and the modified refractivity of unstable atmosphere layer,stable atmosphere layer and neutral atmosphere layer.

关 键 词：蒸发波导 抛物方程 分步傅里叶算法 空间场分布 

分 类 号：TN011[电子电信—物理电子学]