蒸发波导环境下雷达电磁盲区的分布特征  

The Distribution Characteristics of the Shadow Zone of Radar in Evaporation Duct

作　　者：张洁寒[1] 郭涛[2] 李雪萍[1] 张瑜[1] 

机构地区：[1]河南师范大学物理与信息工程学院,河南新乡453007 [2]新乡学院物理系,河南新乡453000

出　　处：《河南师范大学学报（自然科学版）》2011年第4期177-180,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(61077037);河南省基础与前沿技术研究计划项目(092300410236;102300410011)

摘　　要：蒸发波导是近海面大气环境中出现概率最高的一种大气波导,利用蒸发波导可以实现雷达超视距探测.然而,由于蒸发波导的存在,雷达的电磁盲区也会发生不同的变化,从而对岸基、舰船雷达的探测性能产生极大的影响.基于射线追踪技术,构建了电磁波传播路径的微分计算方法,并对蒸发波导环境中的岸基、舰船雷达电磁盲区随雷达天线高度变化特征进行了仿真与分析,得到了电磁盲区的分布特征,总结了电磁盲区的变化规律,从而为岸基、舰船雷达在蒸发波导环境中的探测性能评估奠定必要的基础.Evaporation duct is the highest frequency duct near the sea surface. It can make the radar electromagnetic wave spread to a far fetch, and will have an important effect on the detection performance of shore-base radar and ship-borne radar. The purpose of this article is to evaluate the shadow zone of radar in the evaporation duct environment. By building dif- ferential calculation method based on ray tracing technology, the distribution of shadow zone of shore-base radar and ship-borne radar under different antenna height for evaporation duct environment is studied, which lays a necessary foundation for the shore-base radar and ship-borne radar to exert the largest effects in the evaporation duct environment.

关 键 词：舰船雷达 蒸发波导 电磁盲区 射线追踪 

分 类 号：TN95[电子电信—信号与信息处理]