In this paper, a 3D-printed dual-band reflect-transmit-array (RTA) antenna has been presented, which operates as a reflectarray (RA) in the 28 GHz band and as a transmitarray (TA) in the 41.5 GHz band ...

Massive multiple-input multiple-output (MIMO) systems and millimeter-wave (mmWave) spectrum are key technologies for enabling next-generation wireless communications. To fully exploit the array and ...