一种只需功率测量的相控阵天线分组校准方法  

Invention relates to a grouping calibration method for phased array antennas with only power measurement

作　　者：王福宇 陈文俊 卢青 WANG Fuyu;CHEN Wenjun;LU Qing(The 724th Research Institute of China Shipbuilding Group Corporation,Nanjing 210000,China)

机构地区：[1]中国船舶集团有限公司第七二四研究所,江苏南京210000

出　　处：《无线互联科技》2024年第11期4-6,34,共4页Wireless Internet Technology

摘　　要：相控阵天线收发通道中存在的较大幅相误差会造成辐射方向图畸变,引起天线增益的下降和副瓣的升高。为了获得理想的天线方向图,文章提出了一种基于功率测量的相控阵天线分组校准方法,除了测量一次阵列总的阵列功率外,对阵列元件只需再进行一次相移和两次功率测量就可以确定单元相对幅相分布。为使校准过程中合成辐射场信号变化明显,该方法使用分组矩阵将阵列进行分组,校准时同时改变多个单元相位,将功率测量值代入公式解算得出所有单元的幅相分布。对12×12元阵列的仿真结果表明:使用该方法校准后,天线方向图副瓣电平显著降低,方向图主瓣与理论值基本一致,达到校准效果。A large phase error in the transceiver channel of phased array antenna will result in distortion of radiation pattern,decrease of antenna gain and increase of sidelobe.In order to obtain the ideal antenna pattern,this paper presents a method of group calibration of phased array antenna based on power measurement.Besides measuring the total array power of primary array,the relative amplitude and phase distribution of array elements can be determined only by one phase shift and two power measurements.In order to make the synthetic radiation field signal change obviously in the calibration process,the method uses the grouping matrix to group the array,changes the phase of several units at the same time during calibration,and calculates the amplitude and phase distribution of all units by substituting the measured power values into the formula.The simulation results of the 12×12 element array show that the level of the side lobe of the antenna pattern is significantly reduced after calibration with this method,and the main lobe of the antenna pattern is basically consistent with the theoretical value,and the calibration effect is achieved.

关 键 词：天线校准 相控阵天线 分组校准 功率测量 

分 类 号：TN820[电子电信—信息与通信工程]