Prolate function expansion of circularly supportée aperture fields in near-field antenna characterization

We propose a stable and accurate method for the numerical calculation of Prolate Spheroidal Wave Functions (PSWFs) having circular support in both the spatial and spectral domains. Such PSWFs are used to represent the aperture field of circularly shaped aperture antennas and expoited in a Near-Field/Far-Field transformation algorithm. The results show how the quality of the reconstructions can profit of this efficient and effective solution.