Coupling Reduction of Extremely Closely Spaced Circularly Polarized MIMO Patch Antenna by Phase Shift Method
This paper shows a method to reduce the mutual coupling between extremely closely spaced circularly polarized (CP) multiple-input-multiple-output (MIMO) antenna. The strong coupling between dual-sense CP MIMO elements is thoroughly investigated and a method to effectively suppress the mutual couplin...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/10164088/ |
| _version_ | 1797787439420407808 |
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| author | Huy-Hung Tran Tung The-Lam Nguyen Hoai-Nam Ta Duy-Phong Pham |
| author_facet | Huy-Hung Tran Tung The-Lam Nguyen Hoai-Nam Ta Duy-Phong Pham |
| author_sort | Huy-Hung Tran |
| collection | DOAJ |
| description | This paper shows a method to reduce the mutual coupling between extremely closely spaced circularly polarized (CP) multiple-input-multiple-output (MIMO) antenna. The strong coupling between dual-sense CP MIMO elements is thoroughly investigated and a method to effectively suppress the mutual coupling by controlling the phase of the coupled signal is proposed. High isolation can be achieved by using a grounded stub, which is positioned along the edges of radiating elements. An antenna prototype is fabricated and measured to verify the feasibility of the utilized decoupling scheme. The measured results show an operating bandwidth of 2.1% (5.21-5.32 GHz) with isolation of better than 20 dB. The poor isolation of the coupled MIMO is significantly enhanced to 38 dB with the use of the proposed decoupling network. A 33 dB improvement can be attained with an extremely small edge-to-edge distance of <inline-formula> <tex-math notation="LaTeX">$0.017\lambda _{c}$ </tex-math></inline-formula> and center-to-center spacing of <inline-formula> <tex-math notation="LaTeX">$0.23\lambda _{c}$ </tex-math></inline-formula> at the center frequency. Compared to other related works, the proposed antenna features the smallest element spacing while achieving high isolation enhancement. |
| first_indexed | 2024-03-13T01:21:55Z |
| format | Article |
| id | doaj.art-fc82b6fa3d454071a189da9dcb304172 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-13T01:21:55Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-fc82b6fa3d454071a189da9dcb3041722023-07-04T23:00:23ZengIEEEIEEE Access2169-35362023-01-0111653476535310.1109/ACCESS.2023.328984010164088Coupling Reduction of Extremely Closely Spaced Circularly Polarized MIMO Patch Antenna by Phase Shift MethodHuy-Hung Tran0https://orcid.org/0000-0003-0652-2232Tung The-Lam Nguyen1https://orcid.org/0000-0001-7879-9738Hoai-Nam Ta2Duy-Phong Pham3Faculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi, VietnamIT Department, FPT University, Greenwich Vietnam, Hanoi, VietnamFaculty of Radio Electronics Engineering, Le Quy Don Technical University, Hanoi, VietnamFaculty of Electronics and Telecommunications, Electric Power University, Hanoi, VietnamThis paper shows a method to reduce the mutual coupling between extremely closely spaced circularly polarized (CP) multiple-input-multiple-output (MIMO) antenna. The strong coupling between dual-sense CP MIMO elements is thoroughly investigated and a method to effectively suppress the mutual coupling by controlling the phase of the coupled signal is proposed. High isolation can be achieved by using a grounded stub, which is positioned along the edges of radiating elements. An antenna prototype is fabricated and measured to verify the feasibility of the utilized decoupling scheme. The measured results show an operating bandwidth of 2.1% (5.21-5.32 GHz) with isolation of better than 20 dB. The poor isolation of the coupled MIMO is significantly enhanced to 38 dB with the use of the proposed decoupling network. A 33 dB improvement can be attained with an extremely small edge-to-edge distance of <inline-formula> <tex-math notation="LaTeX">$0.017\lambda _{c}$ </tex-math></inline-formula> and center-to-center spacing of <inline-formula> <tex-math notation="LaTeX">$0.23\lambda _{c}$ </tex-math></inline-formula> at the center frequency. Compared to other related works, the proposed antenna features the smallest element spacing while achieving high isolation enhancement.https://ieeexplore.ieee.org/document/10164088/Circularly polarizedhigh isolationgrounded stubmicrostrip patchMIMO |
| spellingShingle | Huy-Hung Tran Tung The-Lam Nguyen Hoai-Nam Ta Duy-Phong Pham Coupling Reduction of Extremely Closely Spaced Circularly Polarized MIMO Patch Antenna by Phase Shift Method IEEE Access Circularly polarized high isolation grounded stub microstrip patch MIMO |
| title | Coupling Reduction of Extremely Closely Spaced Circularly Polarized MIMO Patch Antenna by Phase Shift Method |
| title_full | Coupling Reduction of Extremely Closely Spaced Circularly Polarized MIMO Patch Antenna by Phase Shift Method |
| title_fullStr | Coupling Reduction of Extremely Closely Spaced Circularly Polarized MIMO Patch Antenna by Phase Shift Method |
| title_full_unstemmed | Coupling Reduction of Extremely Closely Spaced Circularly Polarized MIMO Patch Antenna by Phase Shift Method |
| title_short | Coupling Reduction of Extremely Closely Spaced Circularly Polarized MIMO Patch Antenna by Phase Shift Method |
| title_sort | coupling reduction of extremely closely spaced circularly polarized mimo patch antenna by phase shift method |
| topic | Circularly polarized high isolation grounded stub microstrip patch MIMO |
| url | https://ieeexplore.ieee.org/document/10164088/ |
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