基于曲线拟合阵列中心提取的校准方法  

Calibration of Array Center Extraction Based on Curve Fitting

作　　者：胡留春 贾朝文[1] 安玉元 刘翔 HU Liuchun;JIA Chaowen;AN Yuyuan;LIU Xiang(Southwest China Research Institute of Electronic Equipment,Chengdu 610036,China)

机构地区：[1]中国电子科技集团公司第二十九研究所,成都610036

出　　处：《电子信息对抗技术》2022年第4期95-98,共4页Electronic Information Warfare Technology

摘　　要：干涉仪测向技术具有较高的测向精度,广泛应用于电子战系统。由于天线加工的不一致性,以及天线和接收机之间的电缆长度不能做到绝对等长,导致天线阵和接收机之间的通道相位差不为零,这部分相位差在系统测向前需要通过外辐射校准予以扣除。但实际工程应用中天线通常都固化在天线罩内部,无法准确确定天线单元的位置并完成精准校准。这里提出一种精确计算宽带干涉仪天线阵列相位中心并进行精准校准的方法,该方法提取的单元间距可用于修正系统测向参数,提升系统测向精度。对某干涉仪天线阵外辐射校准的测试数据进行分析,验证该方法的有效性。Interferometer direction-finding is a method with high measurement accuracy,and widely used in electronic warfare systems.However,due to the inconsistency of antenna processing and the fact that the cable between antenna and receiver cannot be absolutely equal in length,the channel phase difference between antenna array and receiver is not zero,which needs to be deducted by external radiation calibration before direction-finding.However,in practical engineering applications,antennas are usually solidified inside the radomes,so it is impossible to accurately determine the position of the antenna unit and complete accurate calibration.A method of accurate calculation of phase center for wideband interferometer array and completing accurate calibration is proposed.Length of antenna baseline extracted by this method can be used to modify the parameters of system direction-finding,improving the accuracy of system direction-finding.The test data of a certain interferometer is analyzed,and the effectiveness of this method is verified.

关 键 词：干涉仪测向 阵列天线 相位中心 

分 类 号：TN820[电子电信—信息与通信工程]