Accuracy of the calderon preconditioned EFIE for the scattering by PEC junctions

The BEM discretised EFIE provides a versatile and accurate approach to the modelling of the scattering of time-harmonic electromagnetic fields by PEC structures. Its domain of application has been extended to include the scattering by closed and open surfaces, and the scattering by surfaces that may contain geometric junctions, i.e. lines along which three or more surfaces meet. Such surfaces are commonly encountered in e.g. the modelling of wings, turbines, cooling fins, backplanes, printed circuit boards, etc.