Broadband Metasurface Antenna Using Hexagonal Loop-Shaped Unit Cells
A broadband metasurface antenna with a novel hexagonal loop-shaped unit cell structure is presented. A hexagonal loop element array is proposed as the main metasurface radiator, which is aperture-fed through a microstrip line and a coupling slot. The bandwidth can be broadened from two perspectives....
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doaj-ad1b801133bb4ba2b58105d6b65ee0ad2021-03-30T03:42:17ZengIEEEIEEE Access2169-35362020-01-01822379722380510.1109/ACCESS.2020.30436569288803Broadband Metasurface Antenna Using Hexagonal Loop-Shaped Unit CellsWenzhang Zhang0https://orcid.org/0000-0001-9549-5832Chaoyun Song1https://orcid.org/0000-0001-8735-3156Rui Pei2https://orcid.org/0000-0003-0829-8334Yi Huang3https://orcid.org/0000-0001-7774-1024Jiafeng Zhou4https://orcid.org/0000-0002-3940-3320Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.KSchool of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, U.KDepartment of Electrical and Electronics Engineering, Xi’an Jiaotong-Liverpool University, Suzhou, ChinaDepartment of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.KDepartment of Electrical Engineering and Electronics, University of Liverpool, Liverpool, U.KA broadband metasurface antenna with a novel hexagonal loop-shaped unit cell structure is presented. A hexagonal loop element array is proposed as the main metasurface radiator, which is aperture-fed through a microstrip line and a coupling slot. The bandwidth can be broadened from two perspectives. On the one hand, the proposed hexagonal loop element is capable of generating broadband radiating bandwidth. On the other hand, due to the shape of the hexagonal loop structure, gaps between unit cells lead to a larger equivalent capacitance. This larger capacitance significantly pulls the fundamental resonant frequency downward, compared with conventional square structures, consequently leading to the broad bandwidth. In the design, the broadband performance is achieved by utilizing five TM modes at five resonant frequencies in the operational band from 4.65 GHz to 8.3 GHz. Apart from the fundamental TM<sub>01</sub> mode, only TM<sub>12</sub> modes were excited in different parts of the metasurface layer at different frequencies. This has ensured that the proposed antenna can maintain a stable radiation pattern in the desired band. The operation of the proposed antenna is analyzed in detail. The proposed hexagonal metasurface antenna with an overall size of 1.1 λ<sub>0</sub> × 1.1 λ<sub>0</sub> × 0.06 λ<sub>0</sub> can achieve 56.3% fractional bandwidth and a gain ranging from 7 to 11 dBi, which can be employed in satellite, radar, and wireless communication systems.https://ieeexplore.ieee.org/document/9288803/Broadbandcharacteristic mode analysishexagonal elementsmetasurface |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wenzhang Zhang Chaoyun Song Rui Pei Yi Huang Jiafeng Zhou |
spellingShingle |
Wenzhang Zhang Chaoyun Song Rui Pei Yi Huang Jiafeng Zhou Broadband Metasurface Antenna Using Hexagonal Loop-Shaped Unit Cells IEEE Access Broadband characteristic mode analysis hexagonal elements metasurface |
author_facet |
Wenzhang Zhang Chaoyun Song Rui Pei Yi Huang Jiafeng Zhou |
author_sort |
Wenzhang Zhang |
title |
Broadband Metasurface Antenna Using Hexagonal Loop-Shaped Unit Cells |
title_short |
Broadband Metasurface Antenna Using Hexagonal Loop-Shaped Unit Cells |
title_full |
Broadband Metasurface Antenna Using Hexagonal Loop-Shaped Unit Cells |
title_fullStr |
Broadband Metasurface Antenna Using Hexagonal Loop-Shaped Unit Cells |
title_full_unstemmed |
Broadband Metasurface Antenna Using Hexagonal Loop-Shaped Unit Cells |
title_sort |
broadband metasurface antenna using hexagonal loop-shaped unit cells |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2020-01-01 |
description |
A broadband metasurface antenna with a novel hexagonal loop-shaped unit cell structure is presented. A hexagonal loop element array is proposed as the main metasurface radiator, which is aperture-fed through a microstrip line and a coupling slot. The bandwidth can be broadened from two perspectives. On the one hand, the proposed hexagonal loop element is capable of generating broadband radiating bandwidth. On the other hand, due to the shape of the hexagonal loop structure, gaps between unit cells lead to a larger equivalent capacitance. This larger capacitance significantly pulls the fundamental resonant frequency downward, compared with conventional square structures, consequently leading to the broad bandwidth. In the design, the broadband performance is achieved by utilizing five TM modes at five resonant frequencies in the operational band from 4.65 GHz to 8.3 GHz. Apart from the fundamental TM<sub>01</sub> mode, only TM<sub>12</sub> modes were excited in different parts of the metasurface layer at different frequencies. This has ensured that the proposed antenna can maintain a stable radiation pattern in the desired band. The operation of the proposed antenna is analyzed in detail. The proposed hexagonal metasurface antenna with an overall size of 1.1 λ<sub>0</sub> × 1.1 λ<sub>0</sub> × 0.06 λ<sub>0</sub> can achieve 56.3% fractional bandwidth and a gain ranging from 7 to 11 dBi, which can be employed in satellite, radar, and wireless communication systems. |
topic |
Broadband characteristic mode analysis hexagonal elements metasurface |
url |
https://ieeexplore.ieee.org/document/9288803/ |
work_keys_str_mv |
AT wenzhangzhang broadbandmetasurfaceantennausinghexagonalloopshapedunitcells AT chaoyunsong broadbandmetasurfaceantennausinghexagonalloopshapedunitcells AT ruipei broadbandmetasurfaceantennausinghexagonalloopshapedunitcells AT yihuang broadbandmetasurfaceantennausinghexagonalloopshapedunitcells AT jiafengzhou broadbandmetasurfaceantennausinghexagonalloopshapedunitcells |
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1724182989075644416 |