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Abstract
When solving electromagnetic problems, integral equation methods, such as the Method of Moments, are known to yield to dense matrix systems whose solution usually supposes an intensive computational cost. Continuous efforts have been developed to overcome this drawback. In this paper, the goal is to generate a set of basis functions defined over the entire domain and characterized by a null radiated power coupling in the far-field region. This behavior permits to diminish the density of unknowns per wavelength, considering only a reduced set of the new basis. Furthermore, the resulting matrix has a sparse structure. All these factors amounts to considerable savings in terms of computer storage and CPU requirements.