An effective scattering analysis for conducting bodies at the interior resonances

It is well known that either the electric field integral equations or the magnetic field integral equations have been widely employed to analyze electromagnetic scattering of conducting bodies. At some discrete resonance frequencies, however, when E-field integral equations or H-field integral equations are applied to attack this problem, the solution to method-of-moments matrix will be nonunique or unstable. A new effective modal method, termed Inagaki mode method, is presented here to solve this problem. At the interior resonances, this modal method, based on electric field integral equations, is used to filter out resonance modes and therefore obtain the right scattering property. The modal method doesn´t need any operation of matrix inversion and possesses the merits of clarity in concept and simplicity in computation. A good agreement is achieved between the calculated results and the results published in some literatures as given in an analytical analysis