Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station

A novel compact multiple-input-multiple-output (MIMO) antenna with a wide impedance bandwidth and high port isolation is proposed for vehicular base stations. The design consists of four identical vertically-polarized monopole-based antenna elements, which are symmetrical about the central axis and...

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Main Authors: Wang, Wensong, Zhao, Zhenyu, Sun, Quqin, Liao, Xinqin, Fang, Zhongyuan, See, Kye Yak, Zheng, Yuanjin
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/154481
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1544812021-12-23T06:32:07Z Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station Wang, Wensong Zhao, Zhenyu Sun, Quqin Liao, Xinqin Fang, Zhongyuan See, Kye Yak Zheng, Yuanjin School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Wideband Vertically-Polarized Antenna Compact Multiple-Input-Multiple-Output Antenna A novel compact multiple-input-multiple-output (MIMO) antenna with a wide impedance bandwidth and high port isolation is proposed for vehicular base stations. The design consists of four identical vertically-polarized monopole-based antenna elements, which are symmetrical about the central axis and are placed 90 degrees apart from each other. The wideband and decoupling features are theoretically analyzed and experimentally demonstrated. Four resonant frequencies are created by the F-shaped radiator, independent reflector and cross-π-shaped structure, which increase the MIMO antenna bandwidth. Parasitic stubs further improve the impedance matching in the high-frequency band. The cross-π-shaped structure acts as a decoupling function and reduces the mutual coupling, which is realized by using two metal strips shorted to the ground plane, perpendicular to each other. The etched slots further improve port isolation. The effects of imitated perfect vehicle metallic surface are also analyzed. The proposed MIMO antenna prototype is fabricated and measured to verify the concept of design. The operating frequency band is from 1.95 GHz to 6.25 GHz with a reflection coefficient of better than-10 dB, where the realized gain is higher than 3.3 dBi, and the maximum value is 6.16 dBi at 2.6 GHz. High isolation of >16.5 dB and low envelop correlation coefficient of <0.028 among designed MIMO antenna elements are also achieved. Nanyang Technological University National Research Foundation (NRF) This research was conducted by the SMRT-NTU Smart Urban Rail Corporate Laboratory with funding support from the National Research Foundation (NRF), SMRT and Nanyang Technological University; under the Corp Lab@University Scheme. 2021-12-23T06:32:07Z 2021-12-23T06:32:07Z 2020 Journal Article Wang, W., Zhao, Z., Sun, Q., Liao, X., Fang, Z., See, K. Y. & Zheng, Y. (2020). Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station. IEEE Transactions On Vehicular Technology, 69(9), 10000-10008. https://dx.doi.org/10.1109/TVT.2020.3004647 0018-9545 https://hdl.handle.net/10356/154481 10.1109/TVT.2020.3004647 2-s2.0-85094180998 9 69 10000 10008 en IEEE Transactions on Vehicular Technology © 2020 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Wideband Vertically-Polarized Antenna
Compact Multiple-Input-Multiple-Output Antenna
spellingShingle Engineering::Electrical and electronic engineering
Wideband Vertically-Polarized Antenna
Compact Multiple-Input-Multiple-Output Antenna
Wang, Wensong
Zhao, Zhenyu
Sun, Quqin
Liao, Xinqin
Fang, Zhongyuan
See, Kye Yak
Zheng, Yuanjin
Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station
description A novel compact multiple-input-multiple-output (MIMO) antenna with a wide impedance bandwidth and high port isolation is proposed for vehicular base stations. The design consists of four identical vertically-polarized monopole-based antenna elements, which are symmetrical about the central axis and are placed 90 degrees apart from each other. The wideband and decoupling features are theoretically analyzed and experimentally demonstrated. Four resonant frequencies are created by the F-shaped radiator, independent reflector and cross-π-shaped structure, which increase the MIMO antenna bandwidth. Parasitic stubs further improve the impedance matching in the high-frequency band. The cross-π-shaped structure acts as a decoupling function and reduces the mutual coupling, which is realized by using two metal strips shorted to the ground plane, perpendicular to each other. The etched slots further improve port isolation. The effects of imitated perfect vehicle metallic surface are also analyzed. The proposed MIMO antenna prototype is fabricated and measured to verify the concept of design. The operating frequency band is from 1.95 GHz to 6.25 GHz with a reflection coefficient of better than-10 dB, where the realized gain is higher than 3.3 dBi, and the maximum value is 6.16 dBi at 2.6 GHz. High isolation of >16.5 dB and low envelop correlation coefficient of <0.028 among designed MIMO antenna elements are also achieved.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Wang, Wensong
Zhao, Zhenyu
Sun, Quqin
Liao, Xinqin
Fang, Zhongyuan
See, Kye Yak
Zheng, Yuanjin
format Article
author Wang, Wensong
Zhao, Zhenyu
Sun, Quqin
Liao, Xinqin
Fang, Zhongyuan
See, Kye Yak
Zheng, Yuanjin
author_sort Wang, Wensong
title Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station
title_short Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station
title_full Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station
title_fullStr Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station
title_full_unstemmed Compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station
title_sort compact quad-element vertically-polarized high-isolation wideband mimo antenna for vehicular base station
publishDate 2021
url https://hdl.handle.net/10356/154481
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