Two-layered optimized metamaterial antenna with high gain and wide bandwidth for 5G mm-Wave applications

A two-layered high gain and wide bandwidth metamaterial antenna working at 29 GHz for mm-Wave applications is proposed in this paper. The metamaterial antenna has an overall compact size of 12.5 x 12.5 x 7.28 mm3. It is realized with a Rogers Duroid 5880 dielectric layer 0.78 mm thick used as substrate and a Rogers RO3010 dielectric layer 1.5 mm thick at distance 5 mm above the radiation element. The radiation element is composed of a square-cut-at-the-four-corners, patch antenna with probe pin feeding. In addition, for further antenna performance enhancement, negative refractive index printed metamaterials surround the patch antenna offering bandwidth and gain enhancement. Simulated results show a significantly wide bandwidth of 7.91 GHz ranging from 26.04 GHz to 33.95 GHz and a high peak realized gain of 12.2 dB. These features make the antenna a good candidate for 5G mm-Wave applications.