Application of Sampling Techniques to Near-Field Far-Field Transformation

摘要

The application of sampling techniques to improve near field to far field (NF/FF) transformation for antenna measurements is described. A technique for redundancy elimination is considered, thus minimizing the required number of measurements while preserving the efficiency of the usual approach. This technique was implemented in a computer program. A more effective computational algorithm for the spherical wave technique was developed and implemented in a computer program. The possibility of avoiding the use of spherical wave expansion, in order to improve the efficiency of the transformation in the case of focusing antennas, is exploited. Techniques based on the use of the sampling-like approach, which are not redundant and are independent of the geometry of the scanning surface are presented. This flexibility is appealing in order to deal with positioning errors. Problems related to phase retrieval are reviewed.