天线方向图是天线辐射特性的重要参数,大型电扫相控阵雷达的天线方向图往往难以准确测量。扫描方向图是利用电扫相控阵波束捷变的特点形成的方向图,较为准确地表征了天线的辐射特性,是对天线方向图很好地近似。文中结合多个大型雷达的工程研制经验论述了在远场和中场测试天线方向图的方法,提高了测试效率和精度,得到了令人满意的结果。

The antenna pattern is one of the important array properties. The patterns of large electronic-scan phased arrays are difficult to be measured exactly. The scan pattern generated by the beam agility of the electronic-scan phased array is a well approximate means to analysis the array properties. The efficient and precision measurements for the antenna pattern in far and middle field are introduced in this paper and validated practically by several large phased array radars.

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