A Wideband PIFA-Pair-Based MIMO Antenna for 5G Smartphones

In this letter, a multiple-input-multiple-output (MIMO) antenna with wideband performance for 5G smartphones is presented. First, a planar inverted-F antenna (PIFA) with an inverted-T-shaped open-slot is introduced. The proposed PIFA operates with a wide bandwidth of 78% due to the multimode technol...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2021-03, Vol.20 (3), p.371-375
Main Authors: Yuan, Xiao-Ting, Chen, Zhe, Gu, Tianqi, Yuan, Tao
Format: Article
Language:English
Subjects:
5G communication
5G mobile communication
Antenna measurements
Antennas
Bandwidths
Broadband
Broadband antennas
Frequencies
Long Term Evolution
MIMO communication
planar inverted-F antenna pair (PIFA-pair)
Smart phones
Smartphones
T shape
ultrawideband
Wideband
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Summary:In this letter, a multiple-input-multiple-output (MIMO) antenna with wideband performance for 5G smartphones is presented. First, a planar inverted-F antenna (PIFA) with an inverted-T-shaped open-slot is introduced. The proposed PIFA operates with a wide bandwidth of 78% due to the multimode technology. Then, two such PIFAs are attempted to be merged as a PIFA-pair, constituting a 2 × 2 sub-MIMO antenna with a similar bandwidth as the PIFA-element. Additionally, the isolation between two PIFA-elements in a PIFA-pair is higher than 10 dB across the broadband. Finally, a 4 × 4 MIMO antenna, which is composed of two PIFA-pairs, is demonstrated to cover the 5G NR frequency bands: n77/n78/n79 and LTE band 46. The simulated and measured results are included for illustrating the performance of the proposed MIMO antenna.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2021.3050337