Integral equation solution of scattering by general bi-isotropic bodies

A combined field integral equation method based on the equivalent principle is presented for the solution of scattering by a general bi-isotropic body. The resulting combined equations are established through splitting given fields into two wavefields, each of which corresponds to respective isotropic mediums. For the modeling of arbitrarily shaped surfaces, the triangulated patches are employed and the Rao-Wilton-Gllison function is selected as the basis function and testing function when the moment of method is applied to solve the resulting integral equations numerically. Numerical results for Pasteur-type bodies are compared with the existing data and good agreements are obtained. Also, the Tellegen-type bodies are calculated. The effects of constitutive parameters on the bistatic cross section are investigated and discussed.