Orthogonal basis functions for the discretization of the Magnetic-field Integral Equation in the low frequency regime

We compare the accuracy in the RCS computation from the discretization in Method of Moments of the Magnetic-field Integral Equation of two different sets of orthogonal facet-oriented basis functions: (i) a recently proposed zero-order set and (ii) a novel first-order set. We show their performance when compared with the traditional discretization in Method of Moments of the Electric-field and the Magnetic-field Integral equations with zero-order divergence-conforming basis functions sets. We show the RCS results for several objects discretized under the following types of meshings: flat triangular, flat quadrilateral and the combination of both.