A Space Efficient Circular Patch MIMO Antenna Having Six Degrees of Freedom for 5G-n79/WLAN Applications
In this article, a single circular patch radiator element of radius 25 mm <inline-formula> <tex-math notation="LaTeX">$\approx ~0.417\lambda _{\mathrm {c}}$ </tex-math></inline-formula> is excited by six <inline-formula> <tex-math notation="LaTeX"...
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2025-01-01
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| Online Access: | https://ieeexplore.ieee.org/document/10844271/ |
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| author | Susanta Kumar Badi Om Prakash Acharya Bhargav Appasani Nicu Bizon |
| author_facet | Susanta Kumar Badi Om Prakash Acharya Bhargav Appasani Nicu Bizon |
| author_sort | Susanta Kumar Badi |
| collection | DOAJ |
| description | In this article, a single circular patch radiator element of radius 25 mm <inline-formula> <tex-math notation="LaTeX">$\approx ~0.417\lambda _{\mathrm {c}}$ </tex-math></inline-formula> is excited by six <inline-formula> <tex-math notation="LaTeX">$50~\Omega $ </tex-math></inline-formula> co-axial probe feeds spaced equally by <inline-formula> <tex-math notation="LaTeX">${60}^{0}$ </tex-math></inline-formula> to generate six non-orthogonal polarized decoupled radiations with non-orthogonal pattern diversity to realize a multi-input multi-output (MIMO) antenna having six degrees of freedom. This is further extended to two element MIMO system with inter element spacing of 0.5 mm (<inline-formula> <tex-math notation="LaTeX">$\approx 0.008\lambda _{\mathrm {c}}$ </tex-math></inline-formula>), where <inline-formula> <tex-math notation="LaTeX">$\lambda _{\mathrm {c}}$ </tex-math></inline-formula> is the wavelength corresponding to centre carrier frequency 5 GHz. The total size of the proposed design is 101 mm <inline-formula> <tex-math notation="LaTeX">$\times 50.5$ </tex-math></inline-formula> mm <inline-formula> <tex-math notation="LaTeX">$\times 1.55$ </tex-math></inline-formula> mm (<inline-formula> <tex-math notation="LaTeX">$\approx ~1.683\lambda _{\mathrm {c}} \times 0.842\lambda _{\mathrm {c}} \times 0.026\lambda _{\mathrm {c}}$ </tex-math></inline-formula>). An acceptable inter port and inter element isolation below -15.2 dB is achieved by loading a simple magneto-electric structure on the patches in the operating range 4.48 GHz to 5.53 GHz which covers 5G-n79, all channels of IEEE 802.11j and few channels of IEEE 802.11a/h/n/ac/ax/be WLAN bands. All the required diversity parameters such as envelope correlation coefficient, diversity gain and mean effective gain ratio are investigated in both uniform and non-uniform media and found within acceptable limit. In addition, channel capacity loss and total active reflection coefficient are studied for multiport MIMO antenna system and found within acceptable limit. |
| format | Article |
| id | doaj-art-2462f989e52149bf981cf77df210c90d |
| institution | Kabale University |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-2462f989e52149bf981cf77df210c90d2025-02-04T00:00:47ZengIEEEIEEE Access2169-35362025-01-0113204482045510.1109/ACCESS.2025.353095410844271A Space Efficient Circular Patch MIMO Antenna Having Six Degrees of Freedom for 5G-n79/WLAN ApplicationsSusanta Kumar Badi0https://orcid.org/0000-0001-5216-1306Om Prakash Acharya1https://orcid.org/0000-0002-3858-7711Bhargav Appasani2https://orcid.org/0000-0002-0878-7405Nicu Bizon3https://orcid.org/0000-0001-9311-7598School of Electronics Engineering, Kalinga Institute of Industrial Technology (Deemed to be University), Bhubaneswar, Odisha, IndiaSchool of Electronics Engineering, Kalinga Institute of Industrial Technology (Deemed to be University), Bhubaneswar, Odisha, IndiaSchool of Electronics Engineering, Kalinga Institute of Industrial Technology (Deemed to be University), Bhubaneswar, Odisha, IndiaFaculty of Electronics, Communication and Computers, University Centre of PiteÃti, National University of Science and Technology POLITEHNICA Bucharest, BucureÃti, RomaniaIn this article, a single circular patch radiator element of radius 25 mm <inline-formula> <tex-math notation="LaTeX">$\approx ~0.417\lambda _{\mathrm {c}}$ </tex-math></inline-formula> is excited by six <inline-formula> <tex-math notation="LaTeX">$50~\Omega $ </tex-math></inline-formula> co-axial probe feeds spaced equally by <inline-formula> <tex-math notation="LaTeX">${60}^{0}$ </tex-math></inline-formula> to generate six non-orthogonal polarized decoupled radiations with non-orthogonal pattern diversity to realize a multi-input multi-output (MIMO) antenna having six degrees of freedom. This is further extended to two element MIMO system with inter element spacing of 0.5 mm (<inline-formula> <tex-math notation="LaTeX">$\approx 0.008\lambda _{\mathrm {c}}$ </tex-math></inline-formula>), where <inline-formula> <tex-math notation="LaTeX">$\lambda _{\mathrm {c}}$ </tex-math></inline-formula> is the wavelength corresponding to centre carrier frequency 5 GHz. The total size of the proposed design is 101 mm <inline-formula> <tex-math notation="LaTeX">$\times 50.5$ </tex-math></inline-formula> mm <inline-formula> <tex-math notation="LaTeX">$\times 1.55$ </tex-math></inline-formula> mm (<inline-formula> <tex-math notation="LaTeX">$\approx ~1.683\lambda _{\mathrm {c}} \times 0.842\lambda _{\mathrm {c}} \times 0.026\lambda _{\mathrm {c}}$ </tex-math></inline-formula>). An acceptable inter port and inter element isolation below -15.2 dB is achieved by loading a simple magneto-electric structure on the patches in the operating range 4.48 GHz to 5.53 GHz which covers 5G-n79, all channels of IEEE 802.11j and few channels of IEEE 802.11a/h/n/ac/ax/be WLAN bands. All the required diversity parameters such as envelope correlation coefficient, diversity gain and mean effective gain ratio are investigated in both uniform and non-uniform media and found within acceptable limit. In addition, channel capacity loss and total active reflection coefficient are studied for multiport MIMO antenna system and found within acceptable limit.https://ieeexplore.ieee.org/document/10844271/Circular patchdegree of freedommagneto-electric structureMIMOpattern diversitypolarization |
| spellingShingle | Susanta Kumar Badi Om Prakash Acharya Bhargav Appasani Nicu Bizon A Space Efficient Circular Patch MIMO Antenna Having Six Degrees of Freedom for 5G-n79/WLAN Applications IEEE Access Circular patch degree of freedom magneto-electric structure MIMO pattern diversity polarization |
| title | A Space Efficient Circular Patch MIMO Antenna Having Six Degrees of Freedom for 5G-n79/WLAN Applications |
| title_full | A Space Efficient Circular Patch MIMO Antenna Having Six Degrees of Freedom for 5G-n79/WLAN Applications |
| title_fullStr | A Space Efficient Circular Patch MIMO Antenna Having Six Degrees of Freedom for 5G-n79/WLAN Applications |
| title_full_unstemmed | A Space Efficient Circular Patch MIMO Antenna Having Six Degrees of Freedom for 5G-n79/WLAN Applications |
| title_short | A Space Efficient Circular Patch MIMO Antenna Having Six Degrees of Freedom for 5G-n79/WLAN Applications |
| title_sort | space efficient circular patch mimo antenna having six degrees of freedom for 5g n79 wlan applications |
| topic | Circular patch degree of freedom magneto-electric structure MIMO pattern diversity polarization |
| url | https://ieeexplore.ieee.org/document/10844271/ |
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