A full-wave, wide-band field solver based on surface integral formulation is introduced. The equivalence principle is used to derive the surface integral formulations based on the interior and the exterior electric and magnetic fields and the boundary conditions. The method of moments (MoM) is used to transform the continuous surface integrals to a discretized linear matrix system. Singularity cancellation and subtraction methods are used to address the numerical integrations of weakly and highly singular terms, respectively. The loop-star basis and testing functions are used along with the frequency scaling to address the low frequency problem. The accuracy of the field solver is analyzed for various surface integral equations as well as roof-top and loop-star basis and testing functions.
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