基于阵元特性的相控阵方向图建模测试研究  

A Study on Pattern Model of Phased Array Based on the Characteristics of Array Elements

作　　者：张金平[1,2] 任波[1,2] 朱富国[1] 

机构地区：[1]南京电子技术研究所,南京210039 [2]天线与微波技术重点实验室,南京210039

出　　处：《现代雷达》2016年第3期65-69,共5页Modern Radar

摘　　要：提出了一种基于阵元通道实测数据的相控阵天线半实物建模方法,并利用该方法实现对阵列天线方向图的快速预测。该建模方法通过利用相控阵天线通道移相、衰减位态实测数据以及辐射阵元的阵中近场分布实测数据,并结合差分进化算法及快速傅里叶算法构建天线方向图数字化模型,从而实现对天线不同波位方向图的高精度建模及预测,大幅度简化天线近场修正及测量验证时间。该方法建立的数字化模型,尤其适用于大型相控阵天线波束性能验证及波束重构的工程实现。A method of predicting the radiation patterns of a phased array is proposed. The mathematical model has been developed with the measured RF behavior of each channel and near field of the array elements. Furthermore, program codes have been implemented based on the differential evoluation algorithm and fast fourier transform algorithm. To validate the method, several radiation patterns of a practical phased array have been calculated and measured. The comparison has shown small discrepancies between the predietation and measurement. Thus the propsoed method is appropriate for evaluating the far-field characteristics of a large-scale phased array while the calibration and test can be avoided. In addition, it is suitable for the pattern configuration of the phased array in practice.

关 键 词：相控阵天线 方向图建模 波束重构 

分 类 号：TN821.8[电子电信—信息与通信工程]