A simple preconditioner based on skew-Hermitian part of the discretized E-field Integral Equation

It is well known that the rate of convergence of the Krylov Subspace Methods (KSMs) applied to the solution of the linear systems of equations arising from the discretization process of the E-Field Integral Equation (EFIE) by Method of Moments (MoM), can be improved by a suitable preconditioning strategy. In this paper, we analyze the performances of an easy preconditioner based on the skew-Hermitian part X of the impedance matrix Z. Numerical examples illustrate its performances and validate the proposed approach.