Continuous vector elements on rational Bezier surfaces in the BEM for scattering problems

This paper presents a study of a vector interpolation scheme on curved surfaces suitable for solving electromagnetic scattering problems using the boundary element method. The scheme ensures C/sup 0/ continuity of the solution currents over the surface The interpolation order of the basis may be increased to improve the accuracy of the solution. The surface is represented by triangular rational Bezier patches that exactly model the test problem used, hence errors due to geometrical approximation are eliminated.