A novel high isolation quad-port multiband MIMO antenna for V2X applications at Sub-6 GHz band

E. Kusuma Kumari; Jerzy R. Szymański; Marta Żurek-Mortka; Mithileysh Sathiyanarayanan

doi:10.1515/freq-2024-0288

Article

A novel high isolation quad-port multiband MIMO antenna for V2X applications at Sub-6 GHz band

E. Kusuma Kumari , Jerzy R. Szymański , Marta Żurek-Mortka and Mithileysh Sathiyanarayanan

Published/Copyright: April 30, 2025

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From the journal Frequenz Volume 79 Issue 7-8

Abstract

A novel effective technique for improving the decoupling among antenna elements in four port MIMO is metamaterial based absorber wall is investigated and presented in this paper. The proposed work includes a quad port MIMO (Multiple Input Multiple Output) antenna for vehicle-to-vehicle (V2V) communication under Sub 6 GHz range. The mutual coupling in MIMO is mitigated by three different techniques: Combline filter, integrated horizontal and vertical absorber walls and patch with meander line technology. The designed antenna has two layer substrates which are coupled by a coaxial feed technique, with dimensions of 75*75*1.6 mm³. By using a combline filter in between the ground of nearby circular patches, the mutual connection between them is lessened. Furthermore, the use of integrated horizontal and vertical absorber walls greatly reduces the radiation interference between adjacent antennas. To find out how flexible the antenna is, parametric experiments are conducted. The findings indicate that the peak gain exceeds 6 dB and the return S11 is less than −19 dB. Furthermore, the suggested 2 × 2 MIMO antenna has an observed diversity gain of 6.42 dB, an Envelop Correlation Coefficient of below than 0.002 and a good isolation was observed between antenna units is of −45.92 dB. The proposed antenna best suited applicant for sub-6GHz applications.

Keywords: isolation; V2X; absorber wall; combline filter; diversity parameters

Corresponding author: E. Kusuma Kumari, 486319 Sri Vasavi Engineering College , Tadepalligudem, India; and Postdoctoral fellow, Casimir Pulaski University of Radom, Radom, Poland, E-mail: kusuma.madhu.ece@gmail.com

Acknowledgement

The author wants to convey heartfelt gratitude to the supervisors for their timely suggestions and guidance, as well as to Sri Vasavi Engineering College for providing the necessary research activities.

Research ethics: The research described in this paper complies with ethical standards as outlined by the journal.
Informed consent: Consent was taken from all authors engaged in this research before their inclusion.
Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.
Use of Large Language Models, AI and Machine Learning Tools: None declared.
Conflict of interest: The authors state no conflict of interest.
Research funding: None declared.
Data availability: Not applicable.

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Received: 2024-09-12

Accepted: 2025-03-31

Published Online: 2025-04-30

Published in Print: 2025-08-26

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https://doi.org/10.1515/freq-2024-0288

Keywords for this article

isolation; V2X; absorber wall; combline filter; diversity parameters