Interferometric Technique With Nonredundant Sampling for Phaseless Inverse Scattering

A phaseless data acquisition applied on a reduced set of points is presented for inverse scattering problems. The setup is based on the Leith-Upatnieks holography with synthesized reference waves so that the phase of the reference wave can be adjusted to acquire the so-called "reduced field" instead of the regular field. Thus, nonregular sampling techniques can be applied resulting in strong reduction in the number of acquisition points. The technique is validated using simulation and measurement examples at microwave frequencies.