Research on FDFD Modeling and Wireless Power Transmission of Near-sea Surface

With the increase of human marine activities, it is of great significance to realize near-sea-surface microwave wireless power transmission according to the electromagnetic wave transmission characteristics of evaporation duct. In this paper, the finite-difference frequency-domain (FDFD) is used to construct the model of near-sea-surface evaporation duct and calculate the electromagnetic field distribution of evaporation duct with high accuracy. The FDFD model is used to analyze the difference of TM mode and TE mode propagation, the electric field distribution at different propagation distances, and the influence of the frequency. The results shows that the evaporation duct can trap part of the electromagnetic power to achieve long-distance transmission.