基于抛物方程的蒸发波导传播研究

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 Based on Parabolic Equation

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.