Compact UWB-MIMO Antenna With High Isolation and Triple Band-Notched Characteristics

Zhijun Tang; Xiaofeng Wu; Jie Zhan; Shigang Hu; Zaifang Xi; Yunxin Liu

doi:10.1109/ACCESS.2019.2897170

IEEE Access (Jan 2019)

Compact UWB-MIMO Antenna With High Isolation and Triple Band-Notched Characteristics

Zhijun Tang,
Xiaofeng Wu,
Jie Zhan,
Shigang Hu,
Zaifang Xi,
Yunxin Liu

Affiliations

Zhijun Tang: ORCiD; School of Electronic Information and Electrical Engineering, Changsha University, Changsha, China
Xiaofeng Wu: School of Information and Electrical Engineering, Hunan University of Science and Technology, Xiangtan, China
Jie Zhan: School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan, China
Shigang Hu: School of Information and Electrical Engineering, Hunan University of Science and Technology, Xiangtan, China
Zaifang Xi: School of Information and Electrical Engineering, Hunan University of Science and Technology, Xiangtan, China
Yunxin Liu: School of Physics and Electronic Science, Hunan University of Science and Technology, Xiangtan, China

DOI: https://doi.org/10.1109/ACCESS.2019.2897170
Journal volume & issue: Vol. 7
pp. 19856 – 19865

Abstract

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A novel and high-performance four-element ultra-wideband (UWB) multiple-input multipleoutput (MIMO) antenna is proposed in the paper. The proposed antenna is designed by using a novel integration technology of the symmetric layout, orthogonal structure, four-directional staircase-shaped decoupling, and multi-slit and multi-slot techniques. The mutual couplings among the antenna elements are significantly reduced by introducing the symmetric orthogonal and separated four-directional staircaseshaped structure. Furthermore, the antenna size is effectively miniaturized, and its impedance bandwidth is broadened by using a two-sided symmetric layout, partial and defected ground structure, the decoupling structure, and multi-slot and multi-slit techniques. Therefore, the antenna has the low-profile structure and a small dimension of 39mm×39mm×1.6mm. Moreover, the proposed antenna achieves triple band-notched characteristics by embedding different type slots and slits on the square radiating elements, default ground structure, and the decoupling structure, respectively. As a result, the antenna obtains the wider bandwidth of 2.30-13.75 GHz with the notched bands of 3.25-3.75 GHz, 5.08-5.90 GHz, and 7.06-7.95 GHz. The three notched bands are good in agreement with the existing interference bands of WiMAX (3.3-3.7 GHz), WLAN (5.15-5.875 GHz), and X-band (7.1-7.9 GHz), respectively. In addition, the proposed antenna also has a lower mutual coupling (<;-22dB), lower envelop correlation coefficient (ECC<;0.02, except for the three notched bands), high multiplexing efficiency (ηmux >-3.0dB), stable gain, and quasi-omnidirectional radiation patterns at the entire impedance bandwidth. Therefore, a good tradeoff of the performance is obtained for the proposed antenna. The proposed antenna can be a good candidate for UWB-MIMO wireless communication applications, and especially for portable UWB-MIMO systems.

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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