多波束比幅测向波束交叠与测向精度的研究

Research on beam overlap and DF accuracy of multi beam amplitude comparison DF

针对常规比幅测向系统测向精度的影响因素较多且系统校正工作量大,不利于后期设备的维护与升级的问题,提出测量天线阵方向图、利用自检源对微波前端与变频通道进行幅度校正的方法。计算当前与左右相邻通道方向图差值并提取比幅测向表,利用通道间数字测幅幅度差进行查表测向,同时研究与仿真该方案中波束交叠系数的选取对比幅测向精度影响,最后给出研究结果。

In view of the problem that the accuracy of the conventional amplitude comparison direction find-ing system is affected by many factors and the system calibration workload is large,which is not conducive to the later equipment maintenance and upgrading.The antenna array pattern is proposed,and the amplitude correction for the micro subtraction front surge and frequency conversion channels is carried out by using the self check source.The D-value between the current and the left or right adjacent channels is calculated and the comparison direction finding table is extractd.The digital amplitude D-value between channels is used to to compare ampli-tude and lookup table for direction finding.The research results are given finally.