A compact broadband high-isolation quad-port MIMO antenna for intelligent driving application

Shengjie Chen, Shuo Yu, Xiaoming Liu, Hongzhu Xi, Aiqing Zhang and Youhong Feng

Journal of Electromagnetic Waves and Applications, 2025, vol. 39, issue 11, 1300-1322

Abstract: A compact quad-port multi-input multi-output antenna for intelligent driving is proposed. The antenna features orthogonal microstrip patch elements and a centrally integrated parasitic structure with four pairs of rotationally symmetric straplines to enhance port isolation. With compact dimensions of 0.92λ × 0.92λ × 0.03λ, the antenna achieves an ultra-wide bandwidth spanning 5.11 GHz – 10.53 GHz, covering bands including 5G WLAN (5.15–5.85 GHz), V2X (5.905 GHz – 5.925 GHz), 6G IMT (6.425–7.125 GHz), and UWB (7.163–8.812 GHz). Experimental results demonstrate exceptional performance. The coupling coefficients remain below −24.16 dB in the entire band, and better than −34.15 dB in the V2X band. The ECC under 0.004, and the DG is better than 9.97 dB with the CCL less than 0.4 bits/s/Hz. Orthogonal element arrangement ensures omnidirectional radiation coverage, addressing the challenges of spatial constraint in vehicular environments.

Date: 2025
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DOI: 10.1080/09205071.2025.2502838

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Journal of Electromagnetic Waves and Applications is currently edited by Mohamad Abou El-Nasr and Pankaj Kumar Choudhury

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