一种高效的高精度相控阵雷达工程测角方法

A High Effective and High Precision Engineering Calculation Method of Angel Error Curve Measurement for Phased Array Radar

相控阵雷达波束宽度随着扫描角的增加而展宽,导致和差波束法测角精度降低,同时,为了解决雷达数据处理芯片存储空间小的限制,本文提出了一种高效的高精度相控阵雷达工程测角方法。该方法以频率值、S曲线系数等信息为输入,进行相应修正处理,查询参数表,求出波束内偏角量,结合波束中心指向,输出天线坐标系下的角度信息;再根据天线罩修正参数表,通过二维线性插值,计算由于天线罩折射引起的角度误差,输出最终修正后天线坐标系下的角度信息。通过仿真分析及暗室测试数据处理验证了工程测角方法的有效性。

The widened phased array radar beam width with the larger scanning angle , makes measurement accuracy of sun-different method is reduced, besides the data processing chip storage space resources is limitted. Therefore, this pa- per presents an effective and high precision engineering calculation method of angel error curve measurement for phased array antenna. The frequentcy value, S curve coefficient information are input, by corresponding correction processing, query pa- rameters table, to calculated amount of beam angle error, combined with the beam center point , output beam angle of the antenna Coordinate System. Then from antenna radome parameters table, through the calculation of two-dimensional linear interpolation, the radome refraction caused by angle the final output error, the modified antenna cordinates angle information are output. Simulation results of error curve slope for angle measurement fit with the results tested in anechoic chamber, which indicates the validity of the proposed method.