Generalized combined field integral equation

The author considers a perfect conducting structure situated in a vacuum. The incident (impressed) electromagnetic field (E/sub i/, H/sub i/) is time-harmonic, of angular frequency /spl omega/. As a result, surface currents J/sub s/ (and corresponding charges /spl rho//sub s/) are induced over the surface of the body, giving the total electric and magnetic field E and W. It is well known that induced currents can be numerically determined by solving the EFIE (electric field integral equation) or the MFIE (magnetic field integral equation), if the analysis frequency is not in the vicinity of interior resonant frequency. However, near the resonant frequencies both of these equations fail to yield a unique solution for induced currents. Various techniques have been applied successfully for eliminating the spurious resonances from the solution, but most often the CFIE (combined field integral equation) is used. The authors consider the general case and develop the generalized CFIE (GCFIE). This enable simplification of various equations.