In this abstract I briefly describe my six months thesis, carried out at LINKS-foundation and at CNR, under the supervision of my tutor Dr Righero Marco. The main argument of the thesis is to perform a near-field to far-field transformation of the electromagnetic field radiated by array of antennae, starting from the measurement of some samples taken in the near field of the scattering object. There are two main challenging scenarios: the former is given by the fact the near field samples are measured in external enviroment by means of a quadrotor; the latter is a consequence of the first one: in order to minimize the time flight of the quadrotor, it is performed an under-sampling of the near field, i.e.