A single layered high‐gain digital metasurface reflectarray antenna for millimeter wave applications

Abstract

Abstract A high‐gain digital metasurface reflectarray antenna for 5G FR‐2 band is presented in this letter. The digital metasurface reflector is composed of single‐layered phase quantized meta‐bit unit cell elements. The metabit consists of a split square integrated with a circular ring. Two discretized phase states are obtained by varying the dimensions of the split square and the circular ring, which mimic the metabit‐0 and metabit‐1, respectively. A digital metasurface reflectarray having dimensions of 5.3 5.3 operating in the frequency range of 37–39 GHz is designed, fabricated, and characterized. A linearly polarized antipodal vivaldi antenna spatially feeds the digital metasurface reflectarray. A maximum measured gain of 19.1 dBi is obtained at 38 GHz, with an aperture efficiency of 23%.