Practical Considerations in Phaseless Spherical Near-Field Measurements

This paper investigates on the postprocessing of spherical near-field measurements in phaseless scenarios. Traditionally, iterative algorithms have been used to propagate between two measurement surfaces to retrieve the near-field phase. In the last years, advanced phase retrieval techniques have been developed formulating the phaseless problem in matrix form. Both approaches are introduced and investigated, comparing its performance with numerical and measurement data. Preliminary results indicate that iterative propagation techniques offer superior performance, yet with a more irregular and nonlinear behavior. The matrix approach, however, offers much more flexibility on its formulation leaving room for more potential improvements.