University of Oulu

Ahmed Mohamed Elshirkasi, Azremi Abdullah Al-Hadi, Rizwan Khan, and Ping Jack Soh, "Correlation Between Elements of a Massive MIMO Antenna in a Sub-6 GHz Mobile Terminal," Progress In Electromagnetics Research C, Vol. 121, 83-95, 2022. doi:10.2528/PIERC22033105

Correlation between elements of a massive MIMO antenna in a sub-6 GHz mobile terminal

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Author: Elshirkasi, Ahmed M.1; Abdullah Al-Hadi, Azremi1; Khan, Rizwan2;
Organizations: 1Advanced Communication Engineering (ACE) Center of Excellence, Faculty of Electronic Engineering Technology (FTKEN), Universiti Malaysia Perlis, Kangar 01000, Perlis, Malaysia
2Department of Research and Development, Laird Technologies (M) SdnBhd, Perai 13600, Penang, Malaysia
3Centre for Wireless Communications (CWC), University of Oulu, Oulu 90570, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.5 MB)
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Language: English
Published: EMW Publishing, 2022
Publish Date: 2022-09-19


This work studies the correlation between 14-elements of a sub-6 GHz MIMO antenna for mobile terminal, operating in the 3.10 to 3.85 GHz frequency band. Envelope correlation coefficient (ECC) was used to assess the relationship between MIMO antenna elements. A total of 91 ECC values were considered at every frequency point for the 14-element antenna, which was performed under two propagation scenarios: (i) a uniform environment, and (ii) a Gaussian environment. For the latter, three angular spreads (AS) of 20˚, 30˚, and 40˚ and incident angle of every 10˚ in both elevation and azimuth coordinates are considered. The resulting ECC in the uniform environment is below 0.15 over the entire operating frequency band, indicating that the 14 elements are minimally correlated. However, in a Gaussian environment, the ECC is evaluated at 3.25 GHz. For the AS values of 20˚, 30˚, and 40˚. The average number of ECC values below the 0.3 threshold is 48, 67, and 81 out of 91 total ECC values, respectively. Finally, a relation is derived between the number of ECC values below 0.3 and the lowly-correlated number of antenna elements. It is seen that at a wider angular spread of 40˚, the number of equivalent lowly-correlated elements is 12 with 87% from all considered incident wave directions.

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Series: Progress in electromagnetics research. C
ISSN: 1937-8718
ISSN-E: 1937-8718
ISSN-L: 1937-8718
Volume: 121
Pages: 83 - 95
DOI: 10.2528/pierc22033105
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: The author would like to acknowledge the support from the Fundamental Research Grant Scheme (FRGS) under a grant number of FRGS/1/2019/TK04/UNIMAP/02/21 from the Ministry of Higher Education Malaysia, and the UniMAP Postdoctoral Fellowship.
Copyright information: © 2022 EMW Publishing. All rights reserved. Published in this repository with the kind permission of the publisher.