摘要
在某些雷达应用领域,天线罩的气动外形严重影响其电磁特性,从而对雷达系统测向性能造成恶劣影响。针对一种复杂结构天线罩,分析其透波率和额外引入的相位误差对雷达测向系统造成的恶劣影响;采用动态查表法实现目标角度粗搜索,并基于均匀圆阵提出长短基线结合聚类寻优的改进干涉仪测向算法,从而实现天线罩补偿后相位数据的精确测向。该算法操作简便,具有较高的运行效率,且能在宽频段、大角度范围内实现对天线罩的相位误差高精度补偿。实验结果表明:该方法能有效地解决非均匀天线罩引起的测向失败问题,具有较强的工程指导意义。
In some radar application fields, the aerodynamic outline of the radome seriously affects its electromagnetic characteristics,which greatly affects the direction finding performance of the radar system. In this paper,the effects of the transmissivity and the extra phase error of a radome with complex structure on the direction finding system are analyzed. The dynamic lookup table method is used to achieve the rough search of the target angle,and an improved interferometer direction finding algorithm with long and short baselines combined with clustering optimization is proposed based on a uniform circular array,so that the accurate direction finding of the phase data after the radome compensation can be achieved. The algorithm is simple in operation,has high operation efficiency,and can achieve high-precision compensation for the radome phase error in a wide frequency band and large angle range. The experimental results show that the method can effectively solve the problem of direction finding failure caused by nonuniform radome,and has strong engineering guiding significance.
作者
陈祎
袁伟
蒋驰
吴迎春
张晓丽
CHEN Yi;YUAN Wei;JIANG Chi;WU Yingchun;ZHANG Xiaoli(Shanghai Radio Equipment Research Institute,Shanghai 201109,China)
出处
《上海航天（中英文）》
CSCD
2022年第6期155-160,共6页
Aerospace Shanghai（Chinese&English）
关键词
天线罩
相位误差
补偿
改进测向算法
radome
phase error
compensation
improved direction finding algorithm
