Physical Optics Modeling of Scattering by Checkerboard Structure for RCS Reduction

Physical optics (PO) is utilized to analyze scattering by checkerboard-patterned structures. It is observed that it can predict the RCS along non-specular directions. The locations of the scattered major lobes using PO and array theory are compared with finite elements method (FEM). Moreover, closed-form solutions developed using PO are used to design nonuniform checkerboard surfaces to enhance the RCS-reduction bandwidth. The PO-based results compare well with data obtained by measurements.