Highly decoupled and high gain conformal two-port MIMO antenna for V2X communications

• Published in: Alexandria engineering journal Vol. 74; pp. 599 - 610
• Main Authors: Aliqab, Khaled, Armghan, Ammar, Alsharari, Meshari, Aly, Moustafa H.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2023; Elsevier
• Subjects: Channel Capacity Loss (CCL); Envelope Correlation Coefficient (ECC); Multi-Input-Multi-Output (MIMO); Total Active Reflection Coefficient (TARC); Vehicular to Any (V2X); Envelope Correlation Coefficient (ECC); Multi-Input-Multi-Output (MIMO); Vehicular to Any (V2X); Total Active Reflection Coefficient (TARC); Channel Capacity Loss (CCL)
• ISSN: 1110-0168
• DOI: 10.1016/j.aej.2023.05.058

This research provides an illustration of a straightforward, budget-friendly, and low-profile multiple-input multiple-output (MIMO) antenna that is able to function at 5.9 GHz and has lowered mutual coupling between the antenna parts. The frequency spectrum of this antenna for automotive communications ranges from 5.85 GHz to 5.95 GHz. It is created specifically for this range. The suggested antenna has not one but two distinct radiating components, each of which is slit in order to give a significant amount of isolation between the radiators. The MIMO antenna has a total dimension of 60 × 87 mm2, which is notably tiny for Vehicular to anything (V2X) applications. Additionally, the MIMO antenna is printed on a 0.6 mm thick flexible polymide substrate. The most important takeaway from this study is that it is possible to achieve extremely low isolation (less than 28 dB) over the entire operational range. The suggested antenna for V2X communications has a radiation efficiency of around 95%, which allows it to achieve an Envelope Correlation Coefficient (ECC) of less than 0.001. The suggested configuration is analyzed in terms of S-parameters, radiation properties such as a two-dimensional radiation pattern, efficiency, and gain, as well as MIMO parameters. With such low-profile design the designed antenna achieves significant improvement in isolation radiation performance in the desired band of operation without adopting decoupling mechanism proves that the conformal antenna that is suggested in this study has been shown to be an important contender for vehicular communications.