A dual-band millimeter-wave MIMO antenna based on SIW for 5G applications

A two-port dual-band millimeter-wave MIMO antenna based on SIW functioning in 5G is presented in this paper. Grounded coplanar waveguide GCPW is used for better impedance matching on antenna elements. This antenna is innovative in that it combines MIMO technology with SIW technology to improve isolation and communication quality. Moreover, double dumbbell-shaped slots are etched inside SIW resonator. Multi-modes are excited by this groove, which results in dual-frequency and broadband antenna performance. The antenna is printed on substrate Rogers 5880 with dimensions of 21.2X 19.2X 0.508 mm
³
. The proposed SIW antenna is capable of working with the 28GHz (25.74 GHz - 29.79 GHz) and 38GHz (37.18GHz - 41.8GHz) bands of 5G mmWaves. In addition, it demonstrates high isolation of more than -20 dB, good gain above 8dBi, FBR around 15dB and ECC less than 0.018 in the whole working band. It has good prospects in 5G applications.