Hybrid scattering-admittance operators for the analysis of finite antenna arrays

We describe the extension of the linear embedding via Green´s operators (LEGO) approach to the solution of finite antenna arrays. The ultimate goal is the calculation of the admittance matrix of the array (receive mode) and the radiation pattern (transmit mode). As the basic idea is the inclusion of each array element inside a LEGO electromagnetic brick, the first step consists of the definition and numerical calculation of hybrid scattering-admittance operators which extend the notion of scattering operators of equivalent currents. In contrast, the combination of many LEGO bricks involves the usual transfer operators for the description of the multiple scattering phenomenon.