Analysis of transient electromagnetic scattering from closed surfaces using a combined field integral equation

In the past, both the time-domain electric and magnetic field integral equa tions have been applied to the analysis of transient scattering from closed structures. Unfortunately, the solutions to both these equations are often corrupted by the presence of spurious interior cavity modes. In this artic le, a time-domain combined field integral equation is derived and shown to offer solutions devoid of any resonant components. It is anticipated that s table marching-on-in-time schemes for solving this combined field integral equation supplemented by fast transient evaluation schemes such as the plan e wave time-domain algorithm will enable the analysis of scattering from el ectrically large closed bodies capable of supporting resonant modes.