Recent use of measured data as near field sources in Computational Electro Magnetic (CEM) tools has opened the possibility to represent antennas in numerical simulations, even when the antenna characteristics and geometry are unknown and therefore cannot be included in a full wave model [1-4]. The near field source consists of an equivalent current representation of the antenna, which is prepared by the inverse source method from the measured radiation pattern [5-9]. This link bringing together numerical simulations and antenna measurements has been validated by a proper campaign, that involves MVG and different software (SW) vendors [10-15]. In the first part of this paper, the latest results of the validation are presented completing the activities described in [1-3]. In the second part of the paper, the link between measurements and simulations has been applied to more complex and/or realistic problems, including scattering problems.