Digital Metasurface Reflectarray Antenna for 5G Millimeter Wave Applications

Abstract

A high gain digital metasurface reflectarray antenna for 5G applications is proposed using a single layered one bit digital metamaterial unit cell. The unit cell is a split square with a pair of metallic strips connecting the outer ring. The unit cell provides the two quantized phase states with 180 phase shift and low insertion loss resulting in one bit digital phase profile. This one bit digital phase distribution is employed to design a 9.7 λ o × 9.7 λ o metasurface surface reflector. The digital metasurface reflect array is centrally feed by the source antipodal Vivaldi antenna to design high gain digital metasurface reflector array antenna. The designed reflect array antenna achieves a broadside gain of 18.7 dBi at 38 GHz with a low cross polarization level of less than -18 dBi respectively.