ABSTRACT
Mathematical simulation of radar scattering (secondary radiation) from aerial and ground objects requires development and elaboration of some principles and methods of applied electrodynamics. This chapter contains generalizations of such basic issues of electrodynamics as Lorentz reciprocity theorem and image principle aimed at expanding them over to the presence of irregularities in space of various kinds, or to the electromagnetic fields corresponding to different material fillings of space of interest. It provides further development of the stationary phase method and of physical optics with practical aim at radar problems with transient target illumination and bistatic configurations. The chapter gives such a generalization of the Lorentz reciprocity theorem, using which, for instance, one can form and study integral field representations that provide corrections due to dielectrics and radar absorbent irregularities into the total diffraction field at a system of metallic scatterers.
