Dual-Band MIMO Antenna for 5G/WLAN Mobile Terminals

• Published in: Micromachines (Basel) Vol. 12; no. 5; p. 489
• Main Authors: Huang, Jianlin, Dong, Guiting, Cai, Qibo, Chen, Zhizhou, Li, Limin, Liu, Gui
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 26.04.2021; MDPI
• Subjects: 5G antenna; 5G mobile communication; Antennas; Bandwidths; Correlation coefficients; Cross coupling; Design; dual-band antenna; Electric fields; Geometry; MIMO; open-loop ring resonator; Radiation; Resonators; Smartphones; sub-6 GHz; T shape; China; MIMO; dual-band antenna; 5G antenna; sub-6 GHz; open-loop ring resonator
• ISSN: 2072-666X; 2072-666X
• DOI: 10.3390/mi12050489

This paper presents a dual-band four-element multiple-input-multiple-output (MIMO) array for the fifth generation (5G) mobile communication. The proposed antenna is composed of an open-loop ring resonator feeding element and a T-shaped radiating element. The utilization of the open-loop ring resonator not only reduces the size of the antenna element, but also provides positive cross-coupling. The dimension of a single antenna element is 14.9 mm × 7 mm (0.27λ × 0.13λ, where λ is the wavelength of 5.5 GHz). The MIMO antenna exhibits a dual-band feature from 3.3 to 3.84 GHz and 4.61 to 5.91 GHz, which can cover 5G New Radio N78 (3.3-3.8 GHz), 5G China Band N79 (4.8-5 GHz), and IEEE 802.11 ac (5.15-5.35 GHz, 5.725-5.85 GHz). The measured total efficiency and isolation are better than 70% and 15 dB, respectively. The calculated envelope correlation coefficient (ECC) is less than 0.02. The measured results are in good agreement with the simulated results.