Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications
Decreasing the mutual coupling between multiple-input-multiple-output (MIMO) antenna elements requires the selection of an appropriate decoupling technique without changing the geometry or operating frequency of the antenna. In this paper, a simple and flexible approach that involves loading a small...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2022/2028146 |
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| _version_ | 1849468828923199488 |
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| author | Di Wu Yang Qiu Guoliang Yu Rongdi Guo Guohua Wu Jiawei Wang Yi Zhang Mingmin Zhu Hao-Miao Zhou |
| author_facet | Di Wu Yang Qiu Guoliang Yu Rongdi Guo Guohua Wu Jiawei Wang Yi Zhang Mingmin Zhu Hao-Miao Zhou |
| author_sort | Di Wu |
| collection | DOAJ |
| description | Decreasing the mutual coupling between multiple-input-multiple-output (MIMO) antenna elements requires the selection of an appropriate decoupling technique without changing the geometry or operating frequency of the antenna. In this paper, a simple and flexible approach that involves loading a small ferrite film on the radiation patch of an MIMO antenna pair has been proposed to mitigate the unwanted mutual coupling. Through a thorough investigation, the two IFA elements with an element distance of only 1.4 mm can be decoupled adequately by properly controlling the ferrite-film loading area and the thickness of the ferrite film, along with maintaining the desired operating frequencies and acceptable radiation characteristics at the LTE Band 42 (3.4–3.6 GHz). The optimum ferrite-film loading on the grounding branch of the IFA element can increase the isolation from −6.64 dB to −10.43 dB and enhance the bandwidth from 3.20–3.88 GHz to 2.83–3.65 GHz, and its efficiency can reach to 45.5%, as well as a 2 dB gain. A physical model has also been established to interpret the operating mechanism of ferrite-film loading on the IFAs. The proposed simulated procedure is validated via measurements. This technique of ferrite loading on MIMO antennas can effectively decouple the mutual coupling at a low cost and with low design complexity, indicating its potential applicability for use in MIMO antennas in mobile handsets. |
| format | Article |
| id | doaj-art-f1f77a500fc74ca7badcc1036c341fd5 |
| institution | Kabale University |
| issn | 1687-5877 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-f1f77a500fc74ca7badcc1036c341fd52025-08-20T03:25:43ZengWileyInternational Journal of Antennas and Propagation1687-58772022-01-01202210.1155/2022/2028146Decoupling Technique Using Ferrite-Film Loading for 5G MIMO ApplicationsDi Wu0Yang Qiu1Guoliang Yu2Rongdi Guo3Guohua Wu4Jiawei Wang5Yi Zhang6Mingmin Zhu7Hao-Miao Zhou8Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang ProvinceKey Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang ProvinceKey Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang ProvinceKey Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang ProvinceKey Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang ProvinceCollege of ScienceKey Laboratory of Wireless Power Transmission of Ministry of EducationKey Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang ProvinceKey Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang ProvinceDecreasing the mutual coupling between multiple-input-multiple-output (MIMO) antenna elements requires the selection of an appropriate decoupling technique without changing the geometry or operating frequency of the antenna. In this paper, a simple and flexible approach that involves loading a small ferrite film on the radiation patch of an MIMO antenna pair has been proposed to mitigate the unwanted mutual coupling. Through a thorough investigation, the two IFA elements with an element distance of only 1.4 mm can be decoupled adequately by properly controlling the ferrite-film loading area and the thickness of the ferrite film, along with maintaining the desired operating frequencies and acceptable radiation characteristics at the LTE Band 42 (3.4–3.6 GHz). The optimum ferrite-film loading on the grounding branch of the IFA element can increase the isolation from −6.64 dB to −10.43 dB and enhance the bandwidth from 3.20–3.88 GHz to 2.83–3.65 GHz, and its efficiency can reach to 45.5%, as well as a 2 dB gain. A physical model has also been established to interpret the operating mechanism of ferrite-film loading on the IFAs. The proposed simulated procedure is validated via measurements. This technique of ferrite loading on MIMO antennas can effectively decouple the mutual coupling at a low cost and with low design complexity, indicating its potential applicability for use in MIMO antennas in mobile handsets.http://dx.doi.org/10.1155/2022/2028146 |
| spellingShingle | Di Wu Yang Qiu Guoliang Yu Rongdi Guo Guohua Wu Jiawei Wang Yi Zhang Mingmin Zhu Hao-Miao Zhou Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications International Journal of Antennas and Propagation |
| title | Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications |
| title_full | Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications |
| title_fullStr | Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications |
| title_full_unstemmed | Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications |
| title_short | Decoupling Technique Using Ferrite-Film Loading for 5G MIMO Applications |
| title_sort | decoupling technique using ferrite film loading for 5g mimo applications |
| url | http://dx.doi.org/10.1155/2022/2028146 |
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