Design and Simulation of Dual-Band MIMO Antenna for Radar and Sub-6-GHz 5G Applications

The MIMO antenna proposed in this article presents dual-band operations for radar in C-band and sub-6-GHz 5G applications. The simulated results show that the suggested dual-band antenna offers impedance bandwidths of 1300 MHz (2.8–4.1 GHz) for the lower band of operation and 500 MHz (7–7.5 GHz) for the higher band. The minimum isolation achieved for the first band is more than 40 dB and its noted more than 45 dB for the second band of operation. The structure is designed with Minkowski shape structure and dumb-bell shape is inserted between the two patches with a separation distance of 3 mm to reduce the interference between the identical patches. The designed antenna offers good radiation characteristics in terms of better gain, better efficiency, and stable radiation patterns. The proposed MIMO structure shows good diversity performance offering desired values of envelope correlation coefficient (ECC) and diversity gain (DG).