A convenient sampling distribution and an optimal sampling interpolation algorithm are here presented for mapping the antenna near-field values on a planar surface. The mapping procedure is based on the theoretical background related to a non-redundant sampling representation of the electromagnetic field and uses an unconventional arrangement of the sampling points. Their position results from the standard plane-rectangular allocation by properly increasing the distance between near sampling points as their distance from the antenna grows. This permits to map the values in a given area by using the knowledge of a reduced number of samples and, therefore, the measurement time is conveniently shorted. Numerical simulations and antenna measurements in anechoic chamber have been executed to test the effectiveness of the mapping procedure, whose accuracy has been proved by means of maximum and mean-square reconstruction errors at given output points.

中文翻译：

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用于绘制天线近场的有用采样表示


这里提出了一种方便的采样分布和最佳采样插值算法，用于将天线近场值映射到平面上。映射过程基于与电磁场的非冗余采样表示相关的理论背景，并使用采样点的非常规布置。它们的位置是根据标准平面矩形分配得出的，方法是随着距天线距离的增加，适当增加附近采样点之间的距离。这允许通过使用减少数量的样本的知识来映射给定区域中的值，因此，方便地缩短了测量时间。已经在电波暗室中进行了数值模拟和天线测量，以测试映射过程的有效性，其准确性已通过给定输出点的最大和均方重建误差得到证明。