Broadband Eight-Antenna Array Design for Sub-6 GHz 5G NR Bands Metal-Frame Smartphone Applications

A multiple-input-multiple-output (MIMO) antenna array for broadband 5G new radio (5G NR) metal-frame smartphone applications is proposed. The MIMO antenna array is realized by loading eight identical antennas (Ant1-Ant8) into the metal frame of the smartphone to form an eight-antenna array for the s...

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Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 19; no. 7; pp. 1078 - 1082
Main Authors Chen, Horng-Dean, Tsai, Yuan-Chung, Sim, Chow-Yen-Desmond, Kuo, Colin
Format Journal Article
LanguageEnglish
Published New York IEEE 01.07.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
5G mobile communication
5G new radio (5G NR)
Antenna arrays
Antenna design
Antennas
Band n77/n78/n79
Bandwidth
Bandwidths
Broadband
Broadband antennas
Channel capacity
Correlation coefficients
Frequencies
Impedance matching
Local area networks
metal-frame smartphone
MIMO (control systems)
MIMO communication
multiple-input–multiple-output (MIMO) antenna array
Noise levels
Signal to noise ratio
slot antenna
Slot antennas
Smartphones
Tuning
Wireless LAN
Wireless networks
WLAN 5 GHz band
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Summary:A multiple-input-multiple-output (MIMO) antenna array for broadband 5G new radio (5G NR) metal-frame smartphone applications is proposed. The MIMO antenna array is realized by loading eight identical antennas (Ant1-Ant8) into the metal frame of the smartphone to form an eight-antenna array for the sub-6 GHz 8 × 8 MIMO system. Each antenna element is a slot antenna type that is composed of an L-shaped open slot and a 50 Ω microstrip feedline, and good impedance matching in the upper frequency band can be achieved by loading a tuning stub to the feedline. The 10 dB impedance bandwidth of the proposed eight-antenna array can cover the 5G NR Bands n77/n78/n79 and wireless local area network (WLAN) 5 GHz band. Besides demonstrating desirable antenna efficiency of 50%-82% and envelope correlation coefficient of <0.11, the isolations between adjacent array elements are also >12 dB. At 20 dB signal-to-noise ratio (SNR), the calculated peak channel capacity of the proposed eight-antenna array applied to an 8 × 8 MIMO system is 43.93 b/s/Hz.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2020.2988898