Characteristic mode theory based on combined field integral equation

Characteristic mode theory is usually formulated on top of the electric field integral equation. We present in this paper a combined field integral equation based characteristic mode theory which is immune to the internal resonance corruption when the characteristic modes of closed perfectly conducting surfaces are iteratively solved for. Numerical results are presented to validate the proposed formulation. This work may offer efficient solutions to characteristic mode analysis which involves electrically large closed surfaces.link_to_OA_fulltex