A well?conditioned integral equation for electromagnetic scattering from composite inhomogeneous bi?anisotropic material and closed perfect electric conductor objects

A well-conditioned volume-surface integral equation, called the volume equation-combined field is applied to analyse electromagnetic (EM) scattering from arbitrarily shaped three-dimensional composite objects comprising both inhomogeneous bi-anisotropic material and closed perfect electric conductors (PECs). The equivalent surface currents are respectively expanded using commonly used RWG SWG basis functions, while a matrix equation derived by method of moments. Because magnetic involved in modelling current, constitutive parameters all tensors, some new kinds singularities encountered properly handled filling process impedance matrix. Several numerical results EM bi-anisotropy PEC shown illustrate accuracy efficiency proposed scheme. validity continuity condition flux enforced on bi-anisotropy-PEC interfaces, which can be eliminate volumetric unknowns, also verified.