High Isolation Dual Port MIMO Antenna for Vehicle-to-Vehicle Communication

This research paper reports a very thin 2-port multiple-input multiple-output (MIMO) antenna with a small footprint of $14\times 10\times 0.58\mathrm{m}\mathrm{m}^{3}$. The proposed design works between the frequencies of 8.73 to 15.86 GHz. A modified hexagonal patch is used along with the defected ground plane to obtain wide bandwidth. A conventional decoupling strip technique is utilized to improve the isolation between the ports and it is found >19dB across the whole operating band. In addition to that, 'H'-shaped slot has been incorporated into the grounding plane to enhance impedance matching. The realized gain and radiation patterns of the designed antenna are calculated and found quite acceptable. Furthermore, the diversity parameters of the antenna are computed with envelope correlation coefficient (ECC) <0.025 and diversity gain (DG) is found >9.97dB across the entire operating frequency range. Finally, the results of MIMO antenna are compared with the calculated data for the purpose of practical validation.