利用蒸发波导进行超视距探测的条件研究  

Conditions of Over-the-horizon Detection Based on Evaporation Duct

作　　者：郭涛[1] 张洁寒[2] 刘莹[2] 张瑜[2] 

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

出　　处：《河南师范大学学报（自然科学版）》2011年第4期181-184,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(61077037)

摘　　要：蒸发波导是海洋大气环境中出现频率最高的波导,利用蒸发波导实现超视距探测是扩大雷达测量范围的一种特殊方法.其中,雷达实现超视距探测的条件是关键问题之一.根据电波传播理论和蒸发波导特征,从蒸发波导的判别、雷达工作波长和频率、电波射线的初始发射角,以及雷达天线所处的位置等方面分析了雷达实现超视距探测的必要条件.结果表明,要实现真正的雷达超视距探测,必须同时具备四个必要条件,即存在蒸发波导,雷达工作波长、初始发射角、天线位置都要满足一定的条件.研究结果为海岸雷达、舰船雷达和通信系统在蒸发波导环境中发挥其最大效用奠定了必要的基础.The highest frequency duct is evaporation duct under marine atmospheric environment, and it is a special method of expanding the radar measuring range by using the evaporation duct to achieve the over-the-horizon detection. On what conditions to ensure the realization of the over-the-horizon radar detection is one of the key problems. Many aspects, such as evaporation duct discrimination, radar operating wavelength and frequency, initial launching angle and the location of radar are studied to get the necessary conditions of the over-the-horizon radar detection. The results show that the four kinds of nec- essary conditions must meet at the same time instead of only one certain condition, which lays a necessary foundation for the marine radar, ship radar and communication system to exert the largest effects in the evaporation duct environment.

关 键 词：雷达 蒸发波导 超视距探测 条件 

分 类 号：TN011[电子电信—物理电子学]