Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins
In this paper, a metasurface-based multiple-input multiple-output (MIMO) antenna with high isolation between antenna elements is presented. The main patch radiator is sandwiched between a metasurface and a ground plane to achieve performance enhancement. The fabricated single element antenna has a c...
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2021-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9430500/ |
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| author | Md. Abu Sufian Niamat Hussain Hussain Askari Seong Gyoon Park Kook Sun Shin Nam Kim |
| author_facet | Md. Abu Sufian Niamat Hussain Hussain Askari Seong Gyoon Park Kook Sun Shin Nam Kim |
| author_sort | Md. Abu Sufian |
| collection | DOAJ |
| description | In this paper, a metasurface-based multiple-input multiple-output (MIMO) antenna with high isolation between antenna elements is presented. The main patch radiator is sandwiched between a metasurface and a ground plane to achieve performance enhancement. The fabricated single element antenna has a compact size of <inline-formula> <tex-math notation="LaTeX">$0.85\lambda _{0} \times 0.85\lambda _{0} \times 0.038\lambda _{0}$ </tex-math></inline-formula>. The antenna exhibits a wideband operational bandwidth from 3.27 to 3.82 GHz for <inline-formula> <tex-math notation="LaTeX">$\vert \text{S}_{11}\vert < -10$ </tex-math></inline-formula>, which corresponds to a fractional bandwidth of 15.5%. Moreover, stable radiation patterns with a peak gain of 8.1 dBi are also achieved across the operating band. The proposed single element antenna is characterized for <inline-formula> <tex-math notation="LaTeX">$2 \times 2$ </tex-math></inline-formula> MIMO system by translating each antenna element orthogonal to each other. A decoupling structure consisting of slots and metallic strip with shorting pins is used to improve the isolation between the MIMO elements. The shorting pins connect the metallic strips (located between MIMO elements) on the metasurface and ground plane. These slots on ground plane and shorting pins affect the electromagnetic field distribution and consequently reduce the mutual coupling. The fabricated MIMO antenna has a compact size of <inline-formula> <tex-math notation="LaTeX">$1.75\lambda _{0}\times 1.75\lambda _{0} \times 0.038\lambda _{0}$ </tex-math></inline-formula>. The proposed 4 port (<inline-formula> <tex-math notation="LaTeX">$2\times 2$ </tex-math></inline-formula>) MIMO antenna provides 15.9% of 10 dB impedance bandwidth from 3.3 to 3.87 GHz with a peak gain of 8.72 dBi. Moreover, the proposed MIMO antenna offers excellent diversity performance, isolation between antenna elements is very high (>32dB), ECC is lower than 0.001, and diversity gain is 9.99 dB very close to the ideal value of 10dB. Owing to these features, the proposed MIMO antenna can be a good candidate for 5G Sub-6 GHz (n78 band) smart devices and sensors. |
| format | Article |
| id | doaj-art-ea4baa7b73b343a9a6b4aaafd6b7ae29 |
| institution | DOAJ |
| issn | 2169-3536 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | IEEE |
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| series | IEEE Access |
| spelling | doaj-art-ea4baa7b73b343a9a6b4aaafd6b7ae292025-08-20T03:05:46ZengIEEEIEEE Access2169-35362021-01-019735337354310.1109/ACCESS.2021.30799659430500Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting PinsMd. Abu Sufian0https://orcid.org/0000-0003-2995-6551Niamat Hussain1https://orcid.org/0000-0001-9730-4622Hussain Askari2https://orcid.org/0000-0003-4757-3474Seong Gyoon Park3Kook Sun Shin4Nam Kim5https://orcid.org/0000-0001-8109-2055School of Information and Communication Engineering, Chungbuk National University, Cheongju, South KoreaSchool of Information and Communication Engineering, Chungbuk National University, Cheongju, South KoreaSchool of Information and Communication Engineering, Chungbuk National University, Cheongju, South KoreaDepartment of Information and Communication Engineering, Kongju National University, Gongju, South KoreaFITI Testing & Research Institute, Cheongju, South KoreaSchool of Information and Communication Engineering, Chungbuk National University, Cheongju, South KoreaIn this paper, a metasurface-based multiple-input multiple-output (MIMO) antenna with high isolation between antenna elements is presented. The main patch radiator is sandwiched between a metasurface and a ground plane to achieve performance enhancement. The fabricated single element antenna has a compact size of <inline-formula> <tex-math notation="LaTeX">$0.85\lambda _{0} \times 0.85\lambda _{0} \times 0.038\lambda _{0}$ </tex-math></inline-formula>. The antenna exhibits a wideband operational bandwidth from 3.27 to 3.82 GHz for <inline-formula> <tex-math notation="LaTeX">$\vert \text{S}_{11}\vert < -10$ </tex-math></inline-formula>, which corresponds to a fractional bandwidth of 15.5%. Moreover, stable radiation patterns with a peak gain of 8.1 dBi are also achieved across the operating band. The proposed single element antenna is characterized for <inline-formula> <tex-math notation="LaTeX">$2 \times 2$ </tex-math></inline-formula> MIMO system by translating each antenna element orthogonal to each other. A decoupling structure consisting of slots and metallic strip with shorting pins is used to improve the isolation between the MIMO elements. The shorting pins connect the metallic strips (located between MIMO elements) on the metasurface and ground plane. These slots on ground plane and shorting pins affect the electromagnetic field distribution and consequently reduce the mutual coupling. The fabricated MIMO antenna has a compact size of <inline-formula> <tex-math notation="LaTeX">$1.75\lambda _{0}\times 1.75\lambda _{0} \times 0.038\lambda _{0}$ </tex-math></inline-formula>. The proposed 4 port (<inline-formula> <tex-math notation="LaTeX">$2\times 2$ </tex-math></inline-formula>) MIMO antenna provides 15.9% of 10 dB impedance bandwidth from 3.3 to 3.87 GHz with a peak gain of 8.72 dBi. Moreover, the proposed MIMO antenna offers excellent diversity performance, isolation between antenna elements is very high (>32dB), ECC is lower than 0.001, and diversity gain is 9.99 dB very close to the ideal value of 10dB. Owing to these features, the proposed MIMO antenna can be a good candidate for 5G Sub-6 GHz (n78 band) smart devices and sensors.https://ieeexplore.ieee.org/document/9430500/Isolation enhancementdecoupling structureslotsshorting pinsMIMO antennan78~band |
| spellingShingle | Md. Abu Sufian Niamat Hussain Hussain Askari Seong Gyoon Park Kook Sun Shin Nam Kim Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins IEEE Access Isolation enhancement decoupling structure slots shorting pins MIMO antenna n78~band |
| title | Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins |
| title_full | Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins |
| title_fullStr | Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins |
| title_full_unstemmed | Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins |
| title_short | Isolation Enhancement of a Metasurface-Based MIMO Antenna Using Slots and Shorting Pins |
| title_sort | isolation enhancement of a metasurface based mimo antenna using slots and shorting pins |
| topic | Isolation enhancement decoupling structure slots shorting pins MIMO antenna n78~band |
| url | https://ieeexplore.ieee.org/document/9430500/ |
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