Physical Interpretation of the Orthogonality Sampling Method

The orthogonality sampling method has been recently introduced in inverse scattering literature as a way to retrieve morphological properties of unknown targets. Both the simplicity and the possibility of being exploited also for a single incidence make this method more appealing than other qualitative methods. However, notwithstanding these interesting features, no physical interpretation is attributed to the method. For this reason, in this contribution we firstly attempt to formulate a physical interpretation of the method, in order to take full advantage of its flexibility and to fully understand its limitations.