Cai, J; Huang, J; Chen, B; Shen, L; Loh, T H; Liu, G (2022) A Defected Circular Ring Dual-Band MIMO Antenna with High Isolation for 5G and IEEE 802.11 a/ac/ax. Progress in Electromagnetics Research, 113. pp. 237-247.

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Abstract

The design and analysis of a dual-band two-port multiple-input multiple-output (MIMO) antenna with high isolation suitable for fifth-generation (5G) and wireless local area network (WLAN) applications are introduced in this paper. On the top of the substrate, the proposed antenna element is mainly composed of a defected circular ring with an L-shaped strip, an F-shaped stub, and an L-shaped stub. The bottom of the substrate comprises two rectangular defected ground structures and a neutral line with two Y-shaped stubs. The antenna isolation structure is employed to minimize the coupling between antenna elements, which is larger than 15 dB. The overall dimension of the proposed two-port MIMO antenna is approximately 45 mm x 45 mm x 1:59 mm. The measured -10 dB impedance frequency bands include 3.28 - 3.72 GHz and 4.44 - 5.92 GHz, which can cover 5G (3.3-3.6 GHz and 4.8-5 GHz) and IEEE 802.11 a/ac/ax (5.15-5.35 GHz and 5.47-5.85 GHz). The measured efficiency is greater than 60% and 55% at the lower and higher frequency bands. The measured peak gain ranges from 4 dBi to 5.8 dBi in both operating frequency bands. The proposed MIMO antenna is feasible for the 5G and WLAN applications.

Item Type:	Article
Subjects:	Electromagnetics > Wireless Communications
Divisions:	Electromagnetic & Electrochemical Technologies
Identification number/DOI:	10.2528/PIERM22080104
Last Modified:	27 Feb 2023 08:45
URI:	https://eprintspublications.npl.co.uk/id/eprint/9672