A New Algorithm for Scattering Calculation of Absorber Coated Objects

In certain applications, for various reasons, it is necessary to reduce the RCS of targets such as aircrafts, missiles, and satellites. Distributed loading is one of the means of reducing the RCS of targets. In this paper a new algorithm for scattering and RCS computation of distributed loaded objects has been presented. In order to compute scattered field from these objects we have used the parabolic equation method. Solving parabolic equation with the marching method needs limited computer storage even for scattering calculations of large targets. Distributed loaded object's boundary has been modeled by Leontovich boundary conditions. Various types of object's boundaries, for modeling complex objects, have been considered and necessary equations have been derived. In order to show the validity of numerical results, the analytic solution for scattered field and RCS of distributed loaded cylinder has been obtained. Next, numerical results for RCS of cylinder have been compared with analytic solution. Finally scattered field and RCS of a distributed loaded missile are calculated