Wideband Gear-Shaped Slot Quad-Port MIMO Antenna on ITO Substrate with Parasitic-Assisted Isolation Enhancement for Sub-6 GHz 5G/WLAN Applications
| Authors | K.S.T. Sai1, N. Prabakaran1, Banothu Y.V.N.R. Swamy2, T.A. Devi3, B.T.P. Madhav1 |
| Affiliations |
1ALRC, Department of ECE, Koneru Lakshmaiah Education Foundation, AP, India 2Department of ECE, LBRCE, Mylavaram, AP, India 3Department of General Section, MBTS Government Polytechnic College, Nallapadu, AP India |
| Е-mail | saikolasani@gmail.com |
| Issue | Volume 18, Year 2026, Number 2 |
| Dates | Received 29 January 2026; revised manuscript received 18 April 2026; published online 29 April 2026 |
| Citation | K.S.T. Sai, N. Prabakaran, Banothu Y.V.N.R. Swamy, et al., J. Nano- Electron. Phys. 18 No 2, 02014 (2026) |
| DOI | https://doi.org/10.21272/jnep.18(2).02014 |
| PACS Number(s) | 84.40.Ba |
| Keywords | ITO substrate, Quad-Port MIMO, Isolation enhancement, Sub-6 GHz. |
| Annotation |
This study introduces a compact, wideband quad-port MIMO antenna featuring a gear-shaped slot radiator integrated onto a 40 50 mm2 ITO-based dielectric substrate, engineered for 5G and WLAN applications below 6 GHz. The antenna is created through a series of design steps that start with a simple circular monopole, move on to partial ground modification, add multilayer slotting, and end with a gear-shaped form based on fractals. The optimized geometry, along with the ITO substrate's transparency and low loss properties, improves the flow of electrical current, making it easier to excite multiple modes and giving the system a wide range of impedance. The single-element prototype works in the frequency range of 2.1 to 5.9 GHz and has clear resonances at 3.2 and 4.5 GHz. The device has a peak gain of 3.1 to 4.2 dBi and a radiation efficiency of 86 to 91%. This means that it works well with a lot of different frequencies. To make the MIMO setup more isolated, corner parasitic patches are added. These patches stop surface-wave coupling without making the antenna footprint bigger. The suggested 2 2 MIMO architecture shows an isolation level of more than 18 dB and an envelope correlation coefficient (ECC) of less than 0.02, which guarantees better diversity performance. The proposed antenna is a strong candidate for next-generation portable 5G and WLAN communication systems owing to its compact dimensions, ITO composition, extensive frequency range, high efficiency, and superior isolation. |
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List of References |
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