Modeling method of electromagnetic field in ocean multilayer medium during electromagnetic wave propagation

Abstract

The invention relates to a modeling method for an electromagnetic field during electromagnetic wave propagation in a marine multilayer medium, which is a novel modeling method that firstly, two layers of media are modeled respectively, and then vector superposition synthesis is performed. In the implementation process of the method, for example, when a radiation source is located in a seawater medium, modeling calculation is carried out on the air-seawater two-layer medium firstly, then modeling calculation is carried out on the seawater-seabed two-layer medium, and finally vector synthesis is carried out on respective model calculation results, so that a result of three-layer media is obtained. According to the method, while the modeling complexity is reduced, the calculation efficiency, the calculation accuracy and the physical interpretation of the result can be ensured. The result shows that compared with the complex process of electromagnetic wave propagation modeling in a traditional three-layer medium, the model derivation process is simple, the modeling process is greatly simplified on the premise that the model calculation efficiency and the result precision are guaranteed, and all items in the obtained electric field and magnetic field components also have clear physical meanings.

Description

technical field [0001] The invention belongs to ocean electromagnetic field calculation, and relates to an electromagnetic field modeling method when electromagnetic waves propagate in ocean multilayer media. Background technique [0002] Using electromagnetic waves can carry out long-distance wireless transmission and communication of data near the ocean interface. This technology essentially utilizes the cross-interface surface wave and side wave components when electromagnetic waves propagate in a layered conductive medium, thereby greatly increasing the propagation distance (Wang Honglei, Research on the propagation characteristics of electromagnetic waves across the sea-air interface, Northwest Industrial University Doctoral Dissertation, 2015). Using this physical phenomenon can realize wireless data transmission near the sea surface and near the seabed, such as wireless data transmission and communication between underwater vehicles and ships on the sea surface, wire...

AI Technical Summary

Problems solved by technology

In this case, the number of media layers in the model constructed is far greater than three layers, such as figure 2 As shown, the number of equations is more, and the coupling between the electromagnetic fields of each layer is more complicated. The difficulty of constructing the model based on the traditional layered theory will increase approximately exponentially, and the calculation efficiency and accuracy will be greatly reduced. At the same time, the complexity of each layer The physical mechanism of electromagnetic field propagation caused by the coupling relationship is also difficult to explain

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