首先,对蒸发波导条件下舰载雷达超视距探测距离进行研究,描述了蒸发波导形成机理,以及需要监测的参数。然后,分析了对舰载雷达实现超视距探测的3个条件,给出了舰载雷达作用距离表达式。最后,采用分步傅里叶变换求解抛物方程法对蒸发波导条件下雷达电磁波传播损失进行了仿真分析,并给出了上下边界和初始场的处理方式。仿真结果表明,蒸发波导越高,目标高度越小,发射仰角越低,雷达作用距离越大。

First, shipborne radar detecting range in evaporation duct conditions is studied, and the mechanism and parmeter of duct conditions is described in this paper. Then, the detection condition of shipborne is analyzed,and the equation of detection range is given. Last, evaporation duct split-step Fourier transformation method for parabolic equation is used to analyze electromagnetic wave spread loss and the model for boundary and initialization condition is provided. The results show that higher duct height,higher target height and lower transmit angle will leads larger radar detection range.