A Super-Wideband and High Isolation MIMO Antenna System Using a Windmill-Shaped Decoupling Structure

Chenyin Yu; Shuhui Yang; Yinchao Chen; Wensong Wang; Li Zhang; Bin Li; Ling Wang

doi:10.1109/ACCESS.2020.3004396

IEEE Access (Jan 2020)

A Super-Wideband and High Isolation MIMO Antenna System Using a Windmill-Shaped Decoupling Structure

Chenyin Yu,
Shuhui Yang,
Yinchao Chen,
Wensong Wang,
Li Zhang,
Bin Li,
Ling Wang

Affiliations

Chenyin Yu: ORCiD; Department of Communication Engineering, Communication University of China, Beijing, China
Shuhui Yang: Department of Communication Engineering, Communication University of China, Beijing, China
Yinchao Chen: Department of Electrical Engineering, University of South Carolina, Columbia, SC, USA
Wensong Wang: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
Li Zhang: Department of Communication Engineering, Communication University of China, Beijing, China
Bin Li: Department of Communication Engineering, Communication University of China, Beijing, China
Ling Wang: Department of Communication Engineering, Communication University of China, Beijing, China

DOI: https://doi.org/10.1109/ACCESS.2020.3004396
Journal volume & issue: Vol. 8
pp. 115767 – 115777

Abstract

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In this paper, a novel super-wideband multiple-input multiple-output (SWB-MIMO) antenna system with high isolation has been proposed, each antenna element consisting of a spade-shaped radiation patch, a defected ground structure (DGS) as well as a windmill-shaped decoupling structure. The elliptical slot etched on the radiation patch and the rectangular DGS are jointly utilized to make better the radiation performance and impedance bandwidth. Both of four-element and eight-element SWB-MIMO antenna systems are simulated and analyzed, respectively. A prototype of the four-element SWB-MIMO antenna system with total dimensions of 58 mm $\times58$ mm $\times 1$ mm was fabricated to verify the concept of design using an FR4 material substrate. Measurement and simulation results indicate that the proposed SWB-MIMO antenna system can work in the frequency band ranging from 2.9 to 40 GHz with a mutual coupling of lower than-17 dB. Also, excellent performance has been achieved with a low envelop correlation coefficient (ECC) of lower than 0.04, high multiplexing efficiency ($\eta _{\mathrm {mux}}$ ) of more than-3.0 dB, stable gain of up to 13.5 dBi as well as quasi-omnidirectional radiation properties. This design provides an important guideline for obtaining a super-wide MIMO antenna.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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