Application of multilevel fast multipole method to the analysis of the scattering of complex bodies modeled by NURBS surfaces

An application of the MLFMA to the electromagnetic analysis of realistic bodies modeled by NURBS surfaces is presented. The discretization of the geometry is carried out using also NURBS surfaces that permit an exact representation of the body under analysis. The basis and test functions are also conformed to the geometry to take advantage of the exact representation. A dual mesh is used to improve the convergence of the method and to allow the analysis of non conducting bodies