舰载相控阵雷达低空测角精度影响因素及改善方法

Influence Factor to the Low-Elevation Detection Performance of Phased Array Radar in Ship and the Improvement Method

以提升舰载相控阵雷达低角探测精度为目标。建立了海面低空多路径模型、海面反射模型、相控阵雷达俯仰测角模型;通过仿真系统性分析了舰载相控阵雷达低空测角精度与测角方式、工作频率、波束指向、海况、波束宽度等因素之间的关系,结果表明,采用和和比幅测角方法、优化加权方式减小波束宽度、适当抬高测角和波束指向、采用多频点平滑测角等手段有利于低空测角精度的提升;提出一种综合利用上述因素的低空测角方法,取得了优异的实装应用效果,工程实用前景显著。

To improve the low-elevation detection performance of ship-borne phased array radar,the low angle multi-path model,sea surface reflection model and elevation estimation model of phased array radar(PAR)are established.The relationship between low-elevation angle accuracy of shipborne PAR and angle estimation method,radar frequency,beam direction,sea state and beam width is systematically analyzed through simulation.The results show that sum-sum angle estimation method,lower beam width by improved beam weight,higher beam direction of angle estimation sum beam,multi-frequency smoothing are benefit for low-elevation angle accuracy improvement.A lowelevation angle estimation method which takes advantage of all the factors above is proposed,which has achieved excellent real-world application results and significant engineering practical prospects.