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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 beam width of the phased array radar broadens with the increase of the scan angle, which leads to the decrease of the accuracy of the measurement by the sum beam difference method. Meanwhile, in order to solve the limitation of the small storage space of the radar data processing chip, Array radar angle measurement method. The method takes the information of frequency value, S-curve coefficient as input, carries out the corresponding correction processing, inquires the parameter table, finds out the amount of deviation of the beam, and combines the beam center point to output the angle information under the antenna coordinate system; The parameter table calculates the angle error caused by the radome refraction by two-dimensional linear interpolation and outputs the angle information under the final corrected antenna coordinate system. Through the simulation analysis and darkroom test data processing, the validity of engineering angle measurement method is verified.