Design of a wideband radar absorbing structure

In this paper, a thin planar electromagnetic absorber consisting of two lossy Frequency Selective Surface (FSS) layers is introduced. The layers are separated by foam material and they are backed by the ground plane. Square rings and crossed dipoles are used in the design of these lossy layers. A wideband absorption characteristic is achieved for zero degrees of incidence angle which is the main point of interest. A simple and fast approach that combines the circuital approach together with the Genetic Algorithm is introduced to design a wideband radar absorbing structure.