一种极平面近场测量方法

A method of plane-polar near-field measurement

本文从互易定理出发,导出了远场的基本公式。运用雅可比-贝塞尔级数展开对近场测量数据进行了处理,获得了天线的远场方向图,给出了计算步骤和测量过程。最后通过极平面近场测量数据,推算了喇叭天线和1.5m抛物面天线的远场方向图,与实测远场进行了比较,吻合良好。

By the reciprocity theorem the basic formulaefor determining far-field patterns are derived. The near-field measured data is processed by Jacobi-Bessel series expansion for the antenna's far fields. The measurement and computational steps are given. Finally, Comparisons between the outdoor far-field measurements and the constructed far-field patterns from the plane-polar near-field measured data are provided for a rectangular horn antenna and a 1.5m parabolic reflector antenna. The results obtained are quite satisfactory.