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Open AccessFeature PaperArticle

A New CPW-Fed Diversity Antenna for MIMO 5G Smartphones

1
Engineering and Informatics, University of Bradford, Bradford BD7 1DP, UK
2
Bradford College, Bradford BD7 1AY, UK
3
SARAS Technology Limited, Leeds LS12 4NQ, UK
4
School of Computing and Digital Technology, Birmingham City University, Birmingham B5 5JU, UK
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(2), 261; https://doi.org/10.3390/electronics9020261
Received: 31 December 2019 / Revised: 27 January 2020 / Accepted: 28 January 2020 / Published: 4 February 2020
(This article belongs to the Special Issue Recent Technical Developments in Energy-Efficient 5G Mobile Cells)
In this study, a new coplanar waveguide (CPW)-fed diversity antenna design is introduced for multiple-input–multiple-output (MIMO) smartphone applications. The diversity antenna is composed of a double-fed CPW-fed antenna with a pair of modified T-ring radiators. The antenna is designed to cover the frequency spectrum of commercial sub-6 GHz 5G communication (3.4–3.8 and 3.8–4.2 GHz). It also provides high isolation, better than −16 dB, without an additional decoupling structure. It offers good potential to be deployed in future smartphones. Therefore, the characteristics and performance of an 8-port 5G smartphone antenna were investigated using four pairs of the proposed diversity antennas. Due to the compact size and also the placement of the elements, the presented CPW-fed smartphone antenna array design occupies a very small part of the smartphone board. Its operation band spans from 3.4 to 4.4 GHz. The simulated results agree well with measured results, and the performance of the smartphone antenna design in the presence of a user is given in this paper as well. The proposed MIMO design provides not only sufficient radiation coverage supporting different sides of the mainboard but also polarization diversity. View Full-Text
Keywords: 5G technology; CPW-fed antenna; diversity antenna; future smartphones; MIMO systems 5G technology; CPW-fed antenna; diversity antenna; future smartphones; MIMO systems
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Ojaroudi Parchin, N.; Jahanbakhsh Basherlou, H.; Al-Yasir, Y.I.A.; M. Abdulkhaleq, A.; Patwary, M.; A. Abd-Alhameed, R. A New CPW-Fed Diversity Antenna for MIMO 5G Smartphones. Electronics 2020, 9, 261.

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