近场聚焦法测相控阵天线方向图

阐述了用聚焦法在菲涅尔区测试相控阵天线的理论依据及实现方法 ,用实验结果对近远场方向图进行了比较。考虑到实际应用 ,对距离标定误差和频率漂移引起的测试误差进行了实验研究。结果表明在菲涅尔区用聚焦法监测相控阵天线性能是一种行之有效的方法。

Pattern Measurement of Phased Array Antenna by Focusing Method in N ear Field

Antenna pattern is the best reflecting of antenna's performance.There are many methods to measure the pattern of phased array antenna,such as the technique of plane scanning in near field,focusing method in Fresnel zone,general method in far field,etc.ln this paper,the principle base and the realization method of the phased array antenna pattern's measurement with focusing method in Fresnel zone are discussed.The patterns of near field and far field are compared through experiment.Considering the fact,an experiment is made on the testing error caused by distance error and frequency drift.The resu1ts indicate that this method to monitor the phased array antenna's performance in Fresnel zone is an effective method.