舰载微波超视距雷达天线架设高度研究  

A Study on Antenna Height of Ship-borne Microwave OTH Radar

作　　者：刘爱国[1] 察豪[1] 席泽敏[1] 周沫[1] 

机构地区：[1]海军工程大学海洋电磁环境研究所,武汉430033

出　　处：《现代雷达》2009年第4期11-14,18,共5页Modern Radar

摘　　要：针对X波段舰载微波超视距雷达,研究了蒸发波导条件下雷达天线架设高度对其探测距离的影响。利用抛物方程模型建立了评估模型,通过仿真分析了天线架高对电磁波传播损耗及雷达作用距离的影响,研究结果表明,不同的层结条件下,虽然天线架高对电磁波传播损耗的影响不相同,但对雷达探测距离的影响却具有一般规律,即波导高度较低时,雷达作用距离随天线架高的增加而增大;当波导高度较高时,雷达探测距离随天线架高的增加先增大后减小。最后针对X波段海上雷达系统天线的架设高度给出了建议。The effect of X-band ship-borne microwave Over the Horizon （OTH） radar antenna height on its detection range in the condition of evaporation duct is studied. Using parabolic equation, an evaluation model is proposed. The effect of radar antenna height on electromagnetic wave propagation loss and radar detection range is analyzed by simulation. Simulation results show that in various atmospheric stabilities the effect of antenna height on electromagnetic wave propagation loss is different, but its effect on ra- dar detection range is the same. The higher the antenna height, the greater radar detection range becomes for low evaporation duct heights. For high evaporation duct heights the radar detection range at first becomes greater and then becomes shorter with the in- crease of antenna height. Finally, the optimum antenna height for marine X-band radar system is suggested.

关 键 词：大气折射率剖面 抛物方程 雷达距离方程 天线高度 

分 类 号：TN959.72[电子电信—信号与信息处理]