Low frequency analysis of multi-scale problems with a Multi-Resolution clipping technique

In this paper we present a Method of Moment (MoM) matrix clipping technique based on the Multi-Resolution (MR) approach able to deal with low frequency problems without loss in accuracy. The MoM matrix sparsification reduces the memory occupation, making it possible to analyze very dense meshes on standard computational hardware. Comparisons in terms of accuracy with the standard MoM and in terms of memory requirements with Multi-Level Fast Multipole Algorithm (MLFMA) confirm the validity of the approach.