Application of Optimal-Dimensionality Sampling of Spherical Wave Expansion in Near-Field Far-Field Transformation

In this paper, spherical wave expansion (SWE) with optimal-dimensionality sampling schemeis developed to the vector field and is applied to transformation of far-field to near-field. Wehave shown that for the radiation patterns which cannot be exactly expressed by sphericalmodes due to the truncation of the expansion, ringing artifacts are observed in thereconstruction fields in this procedure. We have suggested to use the weighted spherical waveexpansion (WSWE) in order to minimize this effect.

Keywords:

Far-field to near-field transformation , Optimal-dimensionality sampling , Weighted Spherical Wave Expansion