Metamaterials with multiband AMC and EBG properties

Complex surfaces that perform as artificial magnetic conductor (AMC) and as electromagnetic band gap (EBG) structures in a selection of predefined frequency bands are presented. This is achieved by introducing defected (or perturbed) arrays. In this paper we demonstrate that the absence of vias, which eases the fabrication process, does not prevent the AMC and EBG operation to coincide in the frequency domain. Method of moments based software has been developed for the fast, accurate and simultaneous investigation of the multi-band AMC and EBG properties of such arrays. Furthermore, the angular stability of the multiband AMC surface has also been assessed. Experimental results that demonstrate a dual-band metamaterial surface with simultaneous AMC and EBG properties are presented.