A compact and highly isolated integrated 8-port MIMO antenna for sub-6 GHz and mm-wave 5G-NR applications
This article presents a compact, self-coupled 8-port MIMO antenna design with enhanced isolation for sub-6 GHz and mm-wave bands in 5G-NR applications. The design features a novel elliptical-shaped monopole antenna with a CPW-fed structure for sub-6 GHz frequencies. These antennas are symmetrically...
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Elsevier
2025-03-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025001562 |
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| author | Manumula Srinubabu Nuthakki Venkata Rajasekhar |
| author_facet | Manumula Srinubabu Nuthakki Venkata Rajasekhar |
| author_sort | Manumula Srinubabu |
| collection | DOAJ |
| description | This article presents a compact, self-coupled 8-port MIMO antenna design with enhanced isolation for sub-6 GHz and mm-wave bands in 5G-NR applications. The design features a novel elliptical-shaped monopole antenna with a CPW-fed structure for sub-6 GHz frequencies. These antennas are symmetrically arranged and extended into a 4-port MIMO configuration. By etching a triangular shape with a diagonal length of 15 mm at each corner of the substrate, the 4-element MIMO antenna achieves a 45° orientation to the axis. This modification reduces the antenna's size, creates space for mm-wave band antennas, enhances spatial diversity, and improves port isolation. Additionally, the design includes four symmetrical semi-circular monopole antennas with circular slits for mm-wave frequencies. The integrated 8-port MIMO antenna merges both sub-6 GHz and mm-wave designs on a single FR-4 substrate (εr = 4.5, tanδ = 0.002) with optimized spacing, maintaining a compact size of 70x70x1.2 mm3. The antenna achieves a bandwidth of 2.2 GHz (Sxx < -10 dB), covering 3.15–5.35 GHz for sub-6 GHz applications, and 6.7 GHz (Sxx < -10 dB), spanning the 23.20–29.90 GHz band for mm-wave frequencies. The antenna demonstrates excellent isolation and gain, with S21 values below -25 dB and peak gains of 11.75 dBi and 12 dBi for the sub-6 GHz and mm-wave bands, respectively. It also exhibits strong diversity performance, with an envelope correlation coefficient8x8 of 0.004 and efficiencies ranging from 88% to 96% for the respective frequency bands. The antenna's stable radiation patterns and spatial diversity make it well-suited for 5G-NR, Wi-Fi 6, and V2X applications. |
| format | Article |
| id | doaj-art-c73853d7576749d2b947f0f2b9590053 |
| institution | Kabale University |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-c73853d7576749d2b947f0f2b95900532025-01-23T05:27:41ZengElsevierResults in Engineering2590-12302025-03-0125104068A compact and highly isolated integrated 8-port MIMO antenna for sub-6 GHz and mm-wave 5G-NR applicationsManumula Srinubabu0Nuthakki Venkata Rajasekhar1School of Electronics Engineering (SENSE), VIT-AP University, Amaravati, IndiaCorresponding author.; School of Electronics Engineering (SENSE), VIT-AP University, Amaravati, IndiaThis article presents a compact, self-coupled 8-port MIMO antenna design with enhanced isolation for sub-6 GHz and mm-wave bands in 5G-NR applications. The design features a novel elliptical-shaped monopole antenna with a CPW-fed structure for sub-6 GHz frequencies. These antennas are symmetrically arranged and extended into a 4-port MIMO configuration. By etching a triangular shape with a diagonal length of 15 mm at each corner of the substrate, the 4-element MIMO antenna achieves a 45° orientation to the axis. This modification reduces the antenna's size, creates space for mm-wave band antennas, enhances spatial diversity, and improves port isolation. Additionally, the design includes four symmetrical semi-circular monopole antennas with circular slits for mm-wave frequencies. The integrated 8-port MIMO antenna merges both sub-6 GHz and mm-wave designs on a single FR-4 substrate (εr = 4.5, tanδ = 0.002) with optimized spacing, maintaining a compact size of 70x70x1.2 mm3. The antenna achieves a bandwidth of 2.2 GHz (Sxx < -10 dB), covering 3.15–5.35 GHz for sub-6 GHz applications, and 6.7 GHz (Sxx < -10 dB), spanning the 23.20–29.90 GHz band for mm-wave frequencies. The antenna demonstrates excellent isolation and gain, with S21 values below -25 dB and peak gains of 11.75 dBi and 12 dBi for the sub-6 GHz and mm-wave bands, respectively. It also exhibits strong diversity performance, with an envelope correlation coefficient8x8 of 0.004 and efficiencies ranging from 88% to 96% for the respective frequency bands. The antenna's stable radiation patterns and spatial diversity make it well-suited for 5G-NR, Wi-Fi 6, and V2X applications.http://www.sciencedirect.com/science/article/pii/S2590123025001562Integrated MIMO antennamm-Wave bandSub-6 GHzSelf- coupled isolationWi-Fi 65G-NR wireless communication |
| spellingShingle | Manumula Srinubabu Nuthakki Venkata Rajasekhar A compact and highly isolated integrated 8-port MIMO antenna for sub-6 GHz and mm-wave 5G-NR applications Results in Engineering Integrated MIMO antenna mm-Wave band Sub-6 GHz Self- coupled isolation Wi-Fi 6 5G-NR wireless communication |
| title | A compact and highly isolated integrated 8-port MIMO antenna for sub-6 GHz and mm-wave 5G-NR applications |
| title_full | A compact and highly isolated integrated 8-port MIMO antenna for sub-6 GHz and mm-wave 5G-NR applications |
| title_fullStr | A compact and highly isolated integrated 8-port MIMO antenna for sub-6 GHz and mm-wave 5G-NR applications |
| title_full_unstemmed | A compact and highly isolated integrated 8-port MIMO antenna for sub-6 GHz and mm-wave 5G-NR applications |
| title_short | A compact and highly isolated integrated 8-port MIMO antenna for sub-6 GHz and mm-wave 5G-NR applications |
| title_sort | compact and highly isolated integrated 8 port mimo antenna for sub 6 ghz and mm wave 5g nr applications |
| topic | Integrated MIMO antenna mm-Wave band Sub-6 GHz Self- coupled isolation Wi-Fi 6 5G-NR wireless communication |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025001562 |
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