Numerical investigation of EBG structures composed of rings

The results of extensive numerical investigation is presented in order the gain a better understanding of the behavior of EBG structure composed of open square rings. Presence of the gap in the cell element of such Electromagnetics Bandgap (EBG) structure renders the structure sensitive to the orientation of the constituent ring elements. It is shown that the bandgap persists for both orthogonal orientations of the open square ring. Also, it is demonstrated through numerical simulations that it is feasible to realize slab EBG configuration comprised of open square rings.