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Design of dual-band low profile high directive EBG resonator antenna, using single layer frequency selective surface (FSS) superstrate

In this paper, we present a novel design of a dual-band high directive EBG resonator antenna that utilizes a single layer frequency selective surfaces (FSS) as a superstrate. In this study we use a special configuration of square loop-array to design the FSS superstrate layer. We obtain the different operating frequencies by adjusting the distance of FSS from printed patch antenna and also the perimeter of square loops. The proposed structure presents more than 18 dBi directivity enhancement at 11.25 GHz and 13.15 GHz as compared to those of a patch antenna with 6 dBi directivity