A comparison of the dyadic Green´s function approach and the mixed potential approach for the solution of surface integral equations

The application of the mixed potential and dyadic Green´s function approaches to the numerical solution of surface integral equation formulations for electromagnetic radiation and scattering problems is briefly reviewed. The convergence rates of these two methods are compared for the problem of electromagnetic scattering by a two-dimensional flat strip. It is found that both methods converge well for this geometry. When the strip is subdivided in a particular manner with pulse expansion functions, however, the dyadic Green´s function approach converges very rapidly