ABSTRACT

This chapter describes the high-frequency methodology employed for predicting radar scattering from multi wall buildings. This is based on the uniform geometrical theory of diffraction (UTD) with the addition of diffraction coefficients appropriate for dielectric wedges formed by walls. The primed vectors denote incident ray coordinates and the unprimed ones are associated with the diffracted ray, which together represent the diffracted fields in a ray-fixed coordinate system. The chapter presents models for general multilayer walls, which may have a periodic dielectric or metallic structure. These models are incorporated into the UTD methodology to predict scattering from multiwall buildings and to remove distortions caused by multilayered and periodic structures forming the walls. The chapter demonstrates the simulated images are produced in the utility of the UTD approach for diagnosing complex building images. It is also shown that through-the-wall image clarity is improved significantly by incorporating the appropriate wall model in the imaging function.