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首页> 外文期刊>Radio Science >Irregular terrain wave propagation by a Fourier split-step wide-angle parabolic wave equation technique for linearly bridged knife-edges
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Irregular terrain wave propagation by a Fourier split-step wide-angle parabolic wave equation technique for linearly bridged knife-edges

机译：线性桥接刀口的傅里叶分步广角抛物线波动方程技术在不规则地形波传播中的应用

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摘要

A novel Fourier split-step algorithm for the solution of the parabolic wave equation is proposed. The derivations are based on a two-dimensional linearly bridged knife-edge terrain model that considers ideally conducting as well as dielectric lossy ground together with a dielectric lossy layer as macroscopic representation of vegetation and buildings. The boundary condition at the terrain interface is formulated in the spectral domain, and it is shown that waves with a very wide angular spectrum with respect to the horizontal can accurately be modeled as long as the dominant portion of energy propagates above the terrain. Validation results are given for an ideally conducting as well as lossy dielectric wedge and an ideally conducting rounded obstacle. Also, real-world propagation curves show good agreement with measured data.
机译：提出了一种新颖的傅里叶分裂步法求解抛物线方程。这些推导基于二维线性桥接的刀口地形模型，该模型将理想的导电以及介电损耗的地面与介电损耗层一起视为植被和建筑物的宏观表示。地形界面处的边界条件是在频谱域中制定的，它表明，只要能量的主要部分在地形上方传播，相对于水平方向具有非常宽的角谱的波就可以准确建模。给出了理想导电，有损介电楔和理想导电圆形障碍物的验证结果。而且，真实世界的传播曲线显示出与测量数据的良好一致性。

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