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Dual-band high isolation eight element MIMO antenna using self decoupling technique for 5G smartphone

Published online by Cambridge University Press:  28 November 2024

Soumik Dey  and
Sukomal Dey Open the ORCID record for Sukomal Dey [Opens in a new window]
Soumik Dey
Affiliation:
Department of Electrical Engineering, Indian Institute of Technology Palakkad, Kerala, India
Sukomal Dey*
Affiliation:
Department of Electrical Engineering, Indian Institute of Technology Palakkad, Kerala, India
*
Corresponding author: Sukomal Dey; Email: sukomal.iitpkd@gmail.com
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Abstract

Massive multiple input–multiple output (MIMO) antenna is required to meet the high data transmission rate in the current 5G and future 6G mobile communication. This paper presents a novel eight-port dual-band MIMO antenna operated within the 5G new radios N77 and N79 band. The designed MIMO incorporates a self-decoupling method to obtain high isolation of 22.96 and 25 dB at the two resonances 3.48 and 4.92 GHz, respectively. The basic antenna element consists of coupling between a staircase slot and a half-wavelength size loop branch. Additionally, an inverted U-shaped microstrip section is integrated with the radiating unit to serve the purpose of self-decoupling operation. The eight antennas are symmetrically located on the two narrow substrates (of size 5.8 × 150 mm2) as a pair of four arrays. The narrow substrates make the metal rim of the 5.5″ display mobile smartphone. The designed MIMO is practically realized and experimentally tested to validate the working mechanism. The envelope correlation coefficient and peak channel capacity are obtained as 0.174 and 35.5 bps/Hz in the lower frequency and 0.069 and 39.1 bps/Hz in the higher frequency.

Keywords

5G smartphoneantenna arraycoupled resonatordual-bandfifth generation (5G) communicationmultiple input–multiple output (MIMO)self-decoupling
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Special Issue 10: Swedish microwave days 2023 , December 2024 , pp. 1756 - 1771
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Copyright
© The Author(s), 2024. Published by Cambridge University Press in association with The European Microwave Association.

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