A High Gain 5G Antenna with Near Zero Refractive Index Superstrate

In this letter, a high-directivity 5G antenna with near zero refractive index metamaterial is presented. Firstly, the near-zero refractive index metamaterial unit cell is designed by the parameter extraction method and then loaded into the designed 5G antenna through a reasonable arrangement. The gain of the antenna is improved by more than 6 dBi at 27 ~ 29 GHz based on the near-zero refractive index metamaterial, and the maximum gain is 13.9 dBi at 28 GHz.