摘要
受雷达天线的低高度、地球凸起的影响,舰船雷达低角探测的范围非常有限。为了对远距离海上目标探测,扩大该舰船雷达探测范围,利用出现概率较大的蒸发波导实现超视距探测是一种较好的方法。但是,在基于蒸发波导的雷达超视距探测时,也会出现电磁盲区,且电磁盲区受蒸发波导特征参数影响。通过分析蒸发波导特征参数,利用描述大气波导中电磁波传播的射线描迹法对蒸发波导特征参数引起的雷达电磁盲区变化进行了计算和仿真,获得了电磁盲区随蒸发波导特征参数的变化规律,为利用蒸发波导实现雷达超视距探测的工程实际应用奠定了基础。
Impacting by the low altitude of radar antenna and the Earth s salient,the low-angle detection range of the shipboard radar is very limited.In order to expand the detection range of shipboard radar,a good method is to realize the over-the-horizon detection by using the evaporation duct.However,in the evaporation duct based radar over-the-horizon detection,radar shadow zone also presents and is impacted by the characteristic parameters of the evaporation duct.By analyzing the characteristic parameters of the evaporation duct,the radar shadow zone variation caused by the characteristic parameters of the evaporation duct is calculated and simulated by the ray tracing method which describes the propagation of the electromagnetic wave in the atmospheric duct.The variation law of the radar shadow zone with the characteristic parameters of the evaporation duct is obtained,which lays a foundation for the practical application of radar over-the-horizon by use of evaporation duct.
作者
张洁寒
赵小纳
赵春丽
张瑜
ZHANG Jiehan;ZHAO Xiaona;ZHAO Chunli;ZHANG Yu(College of Electronic and Electrical Engineering,Henan Normal University,Xinxiang 453007,China)
出处
《雷达科学与技术》
北大核心
2018年第4期461-464,共4页
Radar Science and Technology
基金
国家自然科学基金(No.61077037)
关键词
雷达
蒸发波导
电磁盲区
特征参数
radar
evaporation duct
radar shadow zone
characteristic parameters
