Experimental verification of effect of horizontal inhomogeneity of evaporation duct on electromagnetic wave propagation

• 作者: 史阳 杨坤德 杨益新 马远良
• 来源期刊: 中国物理B（英文版）
• 关键词: horizontal inhomogeneity evaporation duct electromagnetic wave propagation evaporation duct experiment
• 年，卷（期）: 2015,（4）
• 页码范围: 044102-1-044102-9
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/4/044102

摘要

The evaporation duct which forms above the ocean surface has a significant influence on electromagnetic wave prop-agation above 2 GHz over the ocean. The effects of horizontal inhomogeneity of evaporation duct on electromagnetic wave propagation are investigated, both in numerical simulation and experimental observation methods, in this paper. Firstly, the features of the horizontal inhomogeneity of the evaporation duct are discussed. Then, two typical inhomogeneous cases are simulated and compared with the homogeneous case. The result shows that path loss is significantly higher than that in the homogeneous case when the evaporation duct height (EDH) at the receiver is lower than that at the transmitter. It is also concluded that the horizontal inhomogeneity of the evaporation duct has a significant influence when the EDH is low or when the electromagnetic wave frequency is lower than 13 GHz. Finally, experimental data collected on a 149-km long propagation path in the South China Sea in 2013 are used to verify the conclusion. The experimental results are consis-tent with the simulation results. The horizontal inhomogeneity of evaporation duct should be considered when modeling electromagnetic wave propagation over the ocean.