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[IEEE 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Chengdu, China (2018.3.26-2018.3.28)] 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - A Vector Parabolic Equation Method for Propagation Predictions Over 3-D Irregular Terrains
摘要： In this paper, a vector parabolic equation (PE) method based on perfectly absorbing thin screen is applied to predicting the propagation of electromagnetic waves over three-dimensional (3-D) irregular terrains. Under the assumption of forward propagation, the 3-D PE is obtained and the split-step Fourier transform algorithm is adopted to march the potentials from one aperture plane to the next. Terrains are equivalent to a series of perfectly absorbing thin screens arranged along the direction of propagation and the Tukey window is used to attenuate the fields smoothly at the upper boundary without reflections. Finally, in order to validate the proposed method, several numerical simulations are made and the results are compared with the two-dimensional PE method. As a result, good agreements are observed and the proposed method was confirmed to take the effect of lateral terrains into account.
关键词： split-step Fourier transform,vector parabolic equation,propagation prediction,irregular terrain
更新于2025-09-23 15:21:21
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[IEEE 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - Chengdu, China (2018.3.26-2018.3.28)] 2018 IEEE International Conference on Computational Electromagnetics (ICCEM) - A Parabolic Equation Method Based on DEM for Propagation Over Terrain
摘要： In this paper, the wide-angle parabolic equation (WAPE) method is applied on propagation predictions over the irregular terrain obtained from digital elevation model. Starting from a parabolic approximation to the Helmholtz equation, a parabolic equation can be deduced and the split-step Fourier transform algorithm is adopted to solve it. Besides, the terrain is assumed to be perfectly conducting and the piecewise linear shift map technique is used to flatten the boundary. The absorbing boundary condition is also studied to avoid the reflections from calculation boundaries. Finally, in order to verify the accuracy of the WAPE method, several numerical simulations are made and the results are compared with that of the Advanced Refractive Effects Prediction System. As a result, good agreements are observed.
关键词： parabolic equation,digital elevation model,propagation prediction,irregular terrain
更新于2025-09-10 09:29:36