Huang, J L; Chen, Z H; Cai, Q B; Loh, T H; Liu, G (2022) Minimized Triple-Band Eight-Element Antenna Array for 5G Metal-frame Smartphone Applications. Micromachines, 13 (1). 136

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Abstract

A multiple-input-multiple-output (MIMO) antenna array for triple-band 5G metal-frame smartphone applications is proposed in this paper. Each single antenna element consists of an S-shaped feeding strip and an L-shaped radiation strip on the metal frame. The dimension of the antenna element is only 6.5 mm × 7 mm (0.076 λ0 × 0.082 λ0 , λ0 is the free-space wavelength at the frequency of 3.5 GHz). The −6 dB impedance bandwidth of the proposed eight-antenna array can cover 3.3–3.8 GHz, 4.8–5 GHz, and 5.15–5.925 GHz. The evolution design and the analysis of the optimal parameters for a single antenna element are derived to investigate the principle of the antenna. The measured total efficiency is larger than 70%. The measured isolation is better than 13 dB. The measurements of the prototype agree well with the simulation results.

Item Type:	Article
Keywords:	5G new radio (5G NR); sub-6 GHz; MIMO; triple-band antenna; metal-frame smartphone
Subjects:	Electromagnetics > Wireless Communications
Divisions:	Electromagnetic & Electrochemical Technologies
Identification number/DOI:	10.3390/mi13010136
Last Modified:	20 Feb 2023 13:42
URI:	https://eprintspublications.npl.co.uk/id/eprint/9611