Mutual Coupling Reduction of a Circularly Polarized MIMO Antenna Using Parasitic Elements and DGS for V2X Communications

In this article, a 4-port circularly polarized (CP) multiple-input multiple-output (MIMO) antenna at 5.9 GHz is presented for the vehicle to everything (V2X) communications. A novel hybrid decoupling structure consisting of circular ring parasites and defected ground (DGS) used reduce mutual coupling between MIMO elements. The are incorporated antennas perpendicular antennas. Whereas, DGS significantly reduces adjacent These affect electromagnetic field distribution consequently coupling. effectiveness explained through transmission coefficient surface current distribution. simulated measured results show that proposed provides overlapping S11 (–10 dB) axial ratio (3-dB) bandwidth 2.04% (5.82 – 5.94 GHz) with peak gain 7.68 dBic. Moreover, fabricated offers excellent diversity performance, isolation elements very high (>34dB), envelope correlation (ECC) lower than 0.001, 9.99 dB, close ideal value 10 dB. Furthermore, link budget system calculated check suitability V2X communications which shows can communicate them over distance 1.5 kilometers 21 dBm transmit power. Owing these qualities, be an choice