Accurate parametric modeling of gain and sidelobe levels in blocked aperture reflector systems using implicit space mapping

Abstract

This paper presents a space mapping approach to parametric modeling of the gain and sidelobe level in blocked aperture reflector antenna systems. The well-known aperture field integration method is used to provide a fast coarse model of the main beam responses, while full wave or multi-reflection physical optics simulations provide the accurate fine model responses. A formal implicit space mapping formulation is used to align the coarse and fine models over some low dimensional parameter space describing variations in the reflector geometry. The method is validated through two illustrative examples, showing significantly improved accuracy over the classical aperture integration method while requiring only a few full simulations of the structure.