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Open AccessArticle

High-Performance Multiple-Input Multiple-Output Antenna System For 5G Mobile Terminals

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Department of Computer Science, Bacha Khan University, Charsadda 24420, Pakistan
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Electrical Engineering Department, Iqra National University, Peshawar 25000, Pakistan
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Computer Science Department, Cihan University Slemani, Sulaimaniya 46002, Iraq
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Centre For Wireless Technology, Faculty of Engineering, Multimedia University, Cyberjaya 63100, Malaysia
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School of Electronic Sicence and Engineering, University of Electronic Science Technology China, Chengdu 611731, China
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Department of Electronics, Islamia College University, Peshawar 25000, Pakistan
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School of Electrical Engineering, University of Ulsan, Ulsan 44610, Korea
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Authors to whom correspondence should be addressed.
Electronics 2019, 8(10), 1090; https://doi.org/10.3390/electronics8101090
Received: 25 August 2019 / Revised: 18 September 2019 / Accepted: 22 September 2019 / Published: 25 September 2019
(This article belongs to the Special Issue Recent Technical Developments in Energy-Efficient 5G Mobile Cells)
In this paper, the systematic design of a multiple antenna system for 5G smartphone operating at 3.5 GHz for multiple-input multiple-output (MIMO) operation in smartphones is proposed. The smartphone is preferred to be lightweight, thin, and attractive, and as a result metal casings have become popular. Using conventional antennas, such as a patch antenna, Inverted-F antennas, or monopole, in proximity to metal casing leads to decreasing its total efficiency and bandwidth. Therefore, a slot antenna embedded in the metal casing can be helpful, with good performance regarding bandwidth and total efficiency. The proposed multiple antenna system adopted the unit open-end slot antenna fed by Inverted-L microstrip with tuning stub. The measured S-parameters results agree fairly with the numerical results. It attains 200 MHz bandwidth at 3.5 GHz with ports isolation of (≤−13 dB) for any two antennas of the system. The influence of the customer’s hand for the proposed multiple antenna system is also considered, and the MIMO channel capacity is computed. The maximum achievable MIMO channel capacity based on the measured result is 31.25 bps/Hz and is about 2.7 times of 2 × 2 MIMO operation. View Full-Text
Keywords: 5G antenna; slot antenna; mobile terminal antenna; MIMO antenna 5G antenna; slot antenna; mobile terminal antenna; MIMO antenna
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Abdullah, M.; Kiani, S.H.; Abdulrazak, L.F.; Iqbal, A.; Bashir, M.A.; Khan, S.; Kim, S. High-Performance Multiple-Input Multiple-Output Antenna System For 5G Mobile Terminals. Electronics 2019, 8, 1090.

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