A new technique for scattering by the electrical large body with an open cavity - generalized CFIE

A new technique for the scattering problem of an electrically large body with an open cavity, the generalized combined field integral equation (GCFIE) technique, is presented. In GCFIE, both the electric currents and the magnetic currents are operated by just the same CFIE integral operator. Before applying GCFIE, the magnetic currents on the aperture of the cavity had been solved by CS+ABIM (Connection Scheme and Approximate BIM) mentioned in this paper. Thus the only unknowns in GCFIE are the equivalent electric currents on the outer surface of the body whose aperture is closed by an electric conducting wall. Subsequently, MLFMA is applied directly to efficiently calculate the surface electric currents in GCFIE. Several numerical results are presented, demonstrating the accuracy, efficiency and practicability of the GCFIE technique.