Study of Mixed-Order Basis Functions for the Locally Corrected Nyström Method.

A high-order locally corrected Nyström (LCN) method employing the mixed-order basis functions proposed by Çaltşkan and Peterson is presented for the electromagnetic scattering by targets composed of both dielectric and conducting bodies An integral operator based on a combined field formulation for conducting surfaces and a Muller formulation for dielectric surfaces is used. It is found that for general scattering objects, mixed-order basis functions accelerate the convergence of the LCN solution, can eliminate spurious charges, and can significantly reduce the condition number of the impedance matrix. [ABSTRACT FROM AUTHOR]