Design and analysis of four leaf clover shaped MIMO antenna for Sub-6 GHz V2X applications

Abstract

A wide variety of driver safety, comfort, and infotainment systems are available in modern cars, many of which rely on wireless connectivity. This article introduces a modified square-shape MIMO antenna designed for vehicle-to-everything (V2X) communications. The design of the antenna operates for WiMAX, WirelssLAN, frequency bands which possess a compact size of 60 mm × 40 mm × 0.256 mm. The antenna utilizes modified square shape stubs and defected ground and achieves dual-band resonance by using circular shapes at the corners and a slot in the center position. The rectangular and circular slots enable resonance at 4.3 GHz & 5 GHz, and also has a low impedance matching with better radiation of omnidirectional patterns. It was determined that the MIMO antenna under consideration reaches a maximum gain of 6.5 dB and 4 dBi at 4.3 GHz and 5 GHz, respectively. When tested at theta = 30° and phi = 90°, this MIMO antenna shows very little backward radiation, exactly −5 dB. The authors have attained reliable communication by fine-tuning the structural parameters of the antenna to achieve the desired passband performance. Furthermore, virtually placing the antenna on a car model and analyzing its performance in a realistic scenario has enabled them to determine the antenna’s effectiveness in real-world applications. The authors have also presented better simulation results. This approach provides experimental evidence of the antenna’s performance and validates the results, ensuring the proposed antenna meets the required specifications. The article provides a robust analysis of proposed design of the antenna for vehicular communications.