Abstract
The parabolic equation is an efficient numerical solution for electromagnetic wave propagation. In order to address the difficulties in predicting electromagnetic wave propagation in the maritime environment caused by atmospheric dust and rough sea surfaces, and the shortcomings of the existing research that cannot fully reflect the rough characteristics of sea surfaces, the authors have modelled electromagnetic wave propagation in the maritime environment, including in the presence of atmospheric dust. In this study the authors present a parabolic equation modeling method for calculating the electromagnetic wave propagation over rough sea surfaces. Firstly, the rough sea surface is generated by building a double summation model of three-dimensional random sea surface. Then, combined with the piecewise linear shift transformation method of the parabolic equation model, the parabolic equation random sea surface model is constructed, and the electromagnetic wave propagation characteristics in a rough sea environment are analyzed. Finally, a large number of results are compared with the Miler-Brown model and shadow effect model in rough sea environments, which verifies that the random sea surface model can better characterize the influence of rough sea surfaces on electromagnetic wave propagation. The model can be used to improve the reliability of marine microwave communication links and the detection performance of ship-borne radar.
Highlights
The electromagnetic wave propagation at sea is mainly related to the characteristics of propagation domain and the modeling of reflection effects on the sea surface
The method of equivalent reflection coefficient or equivalent surface impedance is often used in engineering applications to consider the roughness of sea surfaces, and it is possible to study the propagation of electromagnetic waves on rough sea surfaces by using the parabolic equation
(6)φthat depends on the height of the rough surface from the Probability Density Function (PDF), so it is very important to obtain an. It can be seen from Equation (6) that the equivalent reflection coefficient depends on the height of accurate the rough surface from the Probability Density Function (PDF), so it is very important to obtain an accurate
Summary
The electromagnetic wave propagation at sea is mainly related to the characteristics of propagation domain (atmospheric dust, etc.) and the modeling of reflection effects on the sea surface (smooth or rough surface). Atmospheric dust is one of the most important factors in the study of electromagnetic wave propagation characteristics in the sea environment [2]. Levy, proposed a modeling method for rough sea surfaces based surfaces based on two-dimensional [6]. Some conclusions given the research of electromagnetic wave propagation under wave propagation underare rough seainsurface conditions in an ideal atmospheric environment, butrough all of sea surface conditions in an ideal atmospheric environment, but all of them are approximate models. The account, electromagnetic scattering sea surface are not taken into account, which cannot into which cannot fullyfactors reflect of thethe shortcomings of rough sea surface characteristics.
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