An Experimental Validation of the Near-Field - Far-Field Transformation with Spherical Spiral Scan [AMTA Corner]

This paper concerns the experimental validation of a probe-compensated near-field-to-far-field (NF-FF) transformation technique using spherical spiral scanning. This allows one to significantly reduce the measurement time, by means of continuous and synchronized movements of the positioning systems of the probe and antenna under test. Such a technique relies on the non-redundant sampling representations of the electromagnetic fields. It makes use of a two-dimensional optimal sampling interpolation formula to recover the near-field data needed to perform the classical spherical near-field-to-far-field transformation. The very good accuracy obtained both in the near-field and the far-field reconstructions establishes the effectiveness of the approach.