Scattering from inhomogeneous material cylinders using a modified fast far field approximation

The Fast Far Field Approximation (FAFFA) is used in conjunction with Richmond´s Method to obtain the scattering patterns of inhomogeneous material cylinders of infinite length and arbitrary cross-section shape. Scatterers may be composed of any combination of perfect dielectrics, lossy dielectrics, or conductors of finite conductivity. A novel extension of this technique called the Modified Fast Far Field Approximation (MFAFFA) is developed to further increase acceleration, and numerical results are obtained. Although other investigations have approximated the field within a dielectric body as the incident field, a more accurate solution is obtained here by treating the total field as an unknown function, which allows determination of the electric field distribution at all points within the body.