I. INTRODUCTION
Over the past few years, the determination of the transmitted or reflected field, due to the presence of dielectric scatterers has been the subject of several researches [1]-[7], because of its many applications in non-linear optical devices, metalenses, microwave waveguides and striplines. Coupling phenomena between isolated scatterers have also been analyzed, as well as the search of a critical distance in which any interaction among them ceases to exist [8]. Mathematical methods, such as the transmission matrix theory in [9]-[10] or Wiener-Hopf method in [11] have been employed to provide a deep insight into those phenomena from the scope of determining the reflected or radiated field.