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Dual-band-notched UWB MIMO antennas with miniaturization using half-cutting technology

Published online by Cambridge University Press:  07 October 2021

Zhonghong Du ,
Xiaohui Zhang ,
Peiyu Qin ,
Yanning Yuan ,
Jiangfan Liu  and
Xiaoli Xi Open the ORCID record for Xiaoli Xi [Opens in a new window]
Zhonghong Du
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
Xiaohui Zhang
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
Peiyu Qin
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
Yanning Yuan
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
Jiangfan Liu
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
Xiaoli Xi*
Affiliation:
The Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China
*
Author for correspondence: Xiaoli Xi, E-mail: xixiaoli@xaut.edu.cn
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Abstract

A compact four-element ultra-wideband (UWB) multiple-input–multiple-output (MIMO) antenna with dual polarization and dual-notched capabilities was developed and fabricated. The MIMO antenna is composed of four orthogonally placed half-cutting UWB antenna elements. This orthogonal placement improves the isolation. Furthermore, an L-shaped slot and a continuous bending slot are etched to realize the band-rejection function in the WiMAX and WLAN bands. The result shows that the antenna achieved operating bands of 2.9–16.5 GHz (140.2%, S11 < −10 dB), fully covering the UWB (3.1–10.6 GHz). The port isolation is greater than 23 dB in the frequency band of interest, excluding two rejected bands. Moreover, the MIMO antenna has excellent diversity performance, such as a low envelope correlation coefficient (<0.004), high diversity gain (approximately 10 dB), and good omnidirectional radiation characteristics.

Keywords

MIMO antennaorthogonal diversitydual-band-notchedhalf-cutting technology
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 8 , October 2022 , pp. 1019 - 1026
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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