SPACA-MLFACA algorithm for fast solution of electromagnetic scattering problems

This paper presents a fast solution of electromagnetic scattering from perfect electric conductors by using a sparfled adaptive cross approximation-multilevel fast adaptive cross approximation (SPACA-MLFACA) algorithm. In the new method, the conventional SPACA and MLFACA is used to deal with the interactions between well-separated blocks with relative small and large size, respectively. As a result, the new method can save more memory and iterative time than the conventional SPACA and MLFACA for electrically large targets.