中国物理B ›› 2015, Vol. 24 ›› Issue (4): 44102-044102.doi: 10.1088/1674-1056/24/4/044102

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

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

史阳, 杨坤德, 杨益新, 马远良   

  1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China
  • 收稿日期:2014-08-15 修回日期:2014-10-23 出版日期:2015-04-05 发布日期:2015-04-05
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11174235) and the Fundamental Research Funds for the Central Universities (Grant No. 3102014JC02010301).

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

Shi Yang (史阳), Yang Kun-De (杨坤德), Yang Yi-Xin (杨益新), Ma Yuan-Liang (马远良)   

  1. School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2014-08-15 Revised:2014-10-23 Online:2015-04-05 Published:2015-04-05
  • Contact: Yang Kun-De E-mail:ykdzym@nwpu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11174235) and the Fundamental Research Funds for the Central Universities (Grant No. 3102014JC02010301).

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摘要：

The evaporation duct which forms above the ocean surface has a significant influence on electromagnetic wave propagation 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 consistent with the simulation results. The horizontal inhomogeneity of evaporation duct should be considered when modeling electromagnetic wave propagation over the ocean.

关键词: horizontal inhomogeneity, evaporation duct, electromagnetic wave propagation, evaporation duct experiment

Abstract:

The evaporation duct which forms above the ocean surface has a significant influence on electromagnetic wave propagation 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 consistent with the simulation results. The horizontal inhomogeneity of evaporation duct should be considered when modeling electromagnetic wave propagation over the ocean.

Key words: horizontal inhomogeneity, evaporation duct, electromagnetic wave propagation, evaporation duct experiment

中图分类号:  (Electromagnetic wave propagation; radiowave propagation)

  • 41.20.Jb
94.20.ws (Electromagnetic wave propagation)