Dual-polarized 8-port sub 6 GHz 5G MIMO diamond-ring slot antenna for smart phone and portable wireless applications

Yasir Fawad; Sadiq Ullah; Muhammad Irfan; Rizwan Ullah; Saifur Rahman; Fazal Muhammad; Abdulkarem H M Almawgani; Salim Nasar Faraj Mursal

doi:10.1371/journal.pone.0288793

Dual-polarized 8-port sub 6 GHz 5G MIMO diamond-ring slot antenna for smart phone and portable wireless applications

PLoS One. 2023 Nov 30;18(11):e0288793. doi: 10.1371/journal.pone.0288793. eCollection 2023.

Authors

Yasir Fawad¹, Sadiq Ullah², Muhammad Irfan³, Rizwan Ullah², Saifur Rahman³, Fazal Muhammad⁴, Abdulkarem H M Almawgani³, Salim Nasar Faraj Mursal³

Affiliations

¹ Telecommunication Engineering Department, University of Engineering and Technology Peshawar, Mardan, Pakistan.
² Telecommunication Engineering Department, University of Engineering and Technology Mardan, Mardan, Pakistan.
³ Electrical Engineering Department, College of Engineering, Najran University, Najran, Saudi Arabia.
⁴ Electrical Engineering Department, University of Engineering and Technology Mardan, Mardan, Pakistan.

Abstract

This manuscript presents high performance dual polarized eight-element multiple input multiple output (MIMO) fifth generation (5G) smartphone antenna. The design consists of four dual-polarized microstrip diamond-ring slot antennas, positioned at corners of printed circuit board (PCB). Cheap Fr-4 dielectric with permittivity 4.3 and thickness of 1.6mm is used as substrate with overall dimension of 150 × 75 × 1.6 mm3. In mobile system due to limited space mutual coupling between nearby antenna elements is an issue that distort MIMO antenna performance. Defected ground structure is used to control coupling. The defected ground structure has advantages like ease of fabrication, compact size and high efficiency as compare to other techniques. Less than 30dB coupling is achieved for adjacent elements. The -10 dB impedance bandwidth of 700 MHz is achieved for all radiating elements ranging from 3.3 GHz to 4.1 GHz. The value is about 900MHz for -6dB. The proposed antenna offers good results in terms of fundamental antenna parameters like reflection coefficient, transmission coefficient, maximum gain, total efficiency. The antenna achieved average gain more than 3.8dBi and average radiation efficiency more than 80% for single dual polarized element. The antenna provides sufficient radiation coverage in all sides. The MIMO antenna characteristics like diversity gain (DG), envelope correlation coefficient (ECC), total active reflection coefficient (TARC) and channel capacity are calculated and found according to standards. Furthermore, effect of user on antenna performance in data-mode and talk-mode are studied. Proposed design is fabricated and tested in real time. The measured results shows that proposed design can be used in future smartphones applications. The design is compared with some of the existing work and found to be the best one in many parameters and can be used for commercial use.

Copyright: © 2023 Fawad et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

MeSH terms

Diamond*
Electric Impedance
Smartphone*

Substances

Diamond

Grants and funding

The authors acknowledge the support from the Deanship of Scientific Research, Najran University. Kingdom of Saudi Arabia, for funding this work under the Research Groups funding program grant code number (NU/RG/SERC/12/9). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.