0750677295

说明：  In this communication we review some recent advances in aggregate-functions approaches, that are based on the construction of efficient MoM basis functions by suitably grouping standard (e.g. Rao-Wilton-Glisson, RWG) functions. The application domains, objectives and related means of achieving them can be significantly different for the various embodiments of the aggregate-functions concept. Compressive approaches can reduce the degrees of freedom of the problem up to allowing a direct, iteration-free solution non-compressive multiscale approaches can act as effective pre-conditioners for iterative methods. For this reason aggregate-functions are well suited to solve antenna, EMC and scattering problems involving large and complex objects.