Comparison of Spherical Wave Expansion and Source Reconstruction Method for Near-Field to Far-Field Transformation

There are two widely used classes of algorithms to determine the far-field properties of antennas from near-field measurements: modal expansion, e.g., spherical wave expansion and source reconstruction. In this paper, the robustness of both approaches with respect to typical uncertainty contributions to the near-field data is assessed based on real measurements. Particularly, the influence of incomplete probe correction and multipath propagation are considered exemplarily.