海上大气负折射现象及其对电波传播影响分析  

Analysis of Subrefractive Profile in the Marine Atmospheric and its Effect on the Propagation of Electromagnetic Wave

作　　者：唐海川[1,2] 黄小毛[3] 吴绳正[3] 王华[2] 

机构地区：[1]大连海事大学环境科学与工程学院,大连116026 [2]海军大连舰艇学院军事海洋系,大连116018 [3]海军司令部航海保证部,天津300034

出　　处：《微波学报》2009年第6期43-48,共6页Journal of Microwaves

摘　　要：近地层负折射结构是海洋大气环境中一种少见的异常折射结构,它对电磁波传播的影响与蒸发波导陷获电磁波传播的效果截然相反。利用蒸发波导模型中的伪折射率概念,研究了海洋大气近地层负折射层高度及廓线参数的计算方法,通过仿真手段比较分析了负折射与蒸发波导的差异及其对电磁波传播影响的"反波导"特征,并利用2002年5月福建平潭岛的试验数据对负折射廓线及其对电磁波影响的"反波导"特性进行了验证分析。Subrefraction is a kind of anomalous refractive structure which seldom appear in marine atmospheric envi- ronment, hs effection on electromagnetic waves propagation is opposite to that of evaporation duct. A method to get the profile parameters of snbrefraction by using the concept of pseudo-refractivity in evaporation duct theories is presented in the paper. Meanwhile, the difference between evaporation duct with subrefraction and the ＂anti-duct＂ effection on electromagnetic wave＇ s propagation of subrefraction is discussed in detail. The characteristics of ＂anti-duct＂ has been validated by the data ob- tained in the experiments arranged in Pintan Island, Fujian, in May , 2002.

关 键 词：负折射结构 廓线参数 伪折射率 电磁波传播 “反波导”特征 

分 类 号：TN011[电子电信—物理电子学] TG172.3[金属学及工艺—金属表面处理]