Abstract
A compact and novel quad-element inset-fed octagonal-shaped multiple input multiple output patch (QIOMP) antenna with a hexagonal-shaped slot is designed for ultra-wideband applications. The proposed MIMO antenna comprises four identical octagonal-shaped radiating elements. To achieve better diversity performance and low mutual coupling, radiating elements are positioned at the ideal distance. The proposed octagonal-shaped MIMO antenna is prototyped on a Fr-4 substrate with the overall dimensions of 32 × 32 × 1.6 mm3. It achieves an ultra-wide bandwidth (S11 < − 10 dB) of 13.9 GHz, operating from 2.5 to 16.7 GHz, except for the band notch from 8.9 to 9.2 GHz. The proposed antenna has a gain of 3.50 dBi, 4.40 dBi, 6.67 dBi, and 5.22 dBi at 4.8 GHz, 8.1 GHz, 10.5 GHz, and 14.1 GHz, respectively. At the operating frequencies, surface current distribution and radiation patterns are examined. The diversity performance of the QIOMP antenna is evaluated by reviewing several MIMO parameters, including an envelope correlation coefficient < 0.03, a diversity gain > 9.8, the total active reflection coefficient, and channel capacity loss < 0.05 bits/sec/Hz. The simulated and experimentally obtained results are presented and exhibit a high degree of concurrence.












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References
Chouhan, S., Panda, D. K., Kushwah, V. S., & Mishra, P. K. (2019). Octagonal-shaped wideband MIMO antenna for human interface device and S-band application. International Journal of Microwave and Wireless Technologies, 11(3), 287–296.
Abdelghany, M. A., Abo Sree, M. F., Desai, A., & Ibrahim, A. A. (2023). 4-port octagonal shaped mimo antenna with low mutual coupling for UWB applications. CMES - Computer Modeling in Engineering and Sciences, 136(2), 1999–2015.
Kumar, P., Urooj, S., & Alrowais, F. (2020). Design and implementation of quad-port MIMO antenna with dual-band elimination characteristics for ultra-wideband applications. Applied Sciences, 10(5), 1715. https://doi.org/10.3390/app10051715
Ali, W. A. E., & Ibrahim, A. A. (2017). A compact double-sided MIMO antenna with an improved isolation for UWB applications. AEU - International Journal of Electronics and Communications, 82, 7–13.
Jafri, S. I., Saleem, R., Shafique, M. F., & Brown, A. K. (2016). Compact reconfigurable multiple-input-multiple-output antenna for ultra-wideband applications. IET Microwaves, Antennas and Propagation, 10(4), 413–419.
Kayabasi, A., Toktas, A., Yigit, E., & Sabanci, K. (2018). Triangular quad-port multi-polarized UWB MIMO antenna with enhanced isolation using neutralization ring. AEU - International Journal of Electronics and Communications, 85, 47–53.
Kumar, A., Ansari, A. Q., Kanaujia, B. K., Kishor, J., & Kumar, S. (2020). An ultra-compact two-port UWB-MIMO antenna with dual band-notched characteristics. AEU - International Journal of Electronics and Communications, 114, 152779.
Wu, L., Lyu, H., & Yu, H. (2019). A novel compact UWB-MIMO antenna with quintuple notched-band characteristics. Wireless Personal Communications, 108(3), 1827–1840.
Premalatha, B., Srikanth, G., & Abhilash, G. (2021). Design and analysis of multi band notched MIMO antenna for portable UWB applications. Wireless Personal Communications, 118(2), 1697–1708.
Mohammad Saadh, A. W., Ashwath, K., Ramaswamy, P., Ali, T., & Anguera, J. (2020). A uniquely shaped MIMO antenna on FR4 material to enhance isolation and bandwidth for wireless applications. AEU - International Journal of Electronics and Communications, 123, 153316.
Sharma, M. K., Kumar, M., & Saini, J. P. (2021). Design and analysis of a compact UWB-MIMO antenna with improved isolation for UWB/WLAN applications. Wireless Personal Communications, 119(4), 2913–2928.
Ojaroudi, M., Ghanbari, G., Ojaroudi, N., & Ghobadi, C. (2009). Small square monopole antenna for UWB applications with variable frequency band-notch function. IEEE Antennas and Wireless Propagation Letters, 8, 1061–1064.
Tripathi, S., Mohan, A., & Yadav, S. (2015). A compact koch fractal UWB MIMO antenna with WLAN band-rejection. IEEE Antennas and Wireless Propagation Letters, 14, 1565–1568.
Khan, A. A., Naqvi, S. A., Khan, M. S., & Ijaz, B. (2021). Quad port miniaturized MIMO antenna for UWB 11 GHz and 13 GHz frequency bands. AEU - International Journal of Electronics and Communications, 131, 153618.
Sohi, A. K., & Kaur, A. (2021). Triple band-stop characteristics from an aperture coupled modified Pythagorean tree fractal-based UWB-MIMO antenna integrated with complementary hexagonal spiral defected ground structure. AEU - International Journal of Electronics and Communications, 137, 153805.
Kumar, P., Pathan, S., Vincent, S., Kumar, O. P., Yashwanth, N., Kumar, P., Shetty, P. R., & Ali, T. (2023). A compact quad-port UWB MIMO antenna with improved isolation using a novel mesh-like decoupling structure and unique DGS. IEEE Transactions on Circuits and Systems II: Express Briefs, 70(3), 949–953.
Chen, Z., Zhou, W., & Hong, J. (2021). A miniaturized MIMO antenna with triple band-notched characteristics for UWB applications. IEEE Access, 9, 63646–63655.
Singh, H. V., Tripathi, S., & Mohan, A. (2021). Closely-coupled MIMO antenna with high wideband isolation using decoupling circuit. AEU - International Journal of Electronics and Communications, 138, 2021.
Mao, C. X., & Chu, Q. X. (2014). Compact coradiator UWB-MIMO antenna with dual polarization. IEEE Transactions on Antennas and Propagation, 62(9), 4474–4480.
Rajkumar, S., Anto Amala, A., & Selvan, K. T. (2019). Isolation improvement of UWB MIMO antenna utilising molecule fractal structure. Electronics Letters, 55(10), 576–579.
Modak, S., & Khan, T. (2021). A slotted UWB-MIMO antenna with quadruple band-notch characteristics using mushroom EBG structure. AEU - International Journal of Electronics and Communications, 134, 153673.
Modak, S., Khan, T., & Laskar, R. H. (2019). Penta-band notched ultra-wideband monopole antenna loaded with electromagnetic bandgap-structures and modified U-shaped slots. International Journal of RF and Microwave Computer-Aided Engineering, 29(3), 1–11.
Modak, S., Khan, T., Denidni, T. A., & Antar, Y. M. (2022). Miniaturized self-isolated UWB MIMO planar/cuboidal antenna with dual X-band interference rejection. AEU - International Journal of Electronics and Communications, 143, 1–11.
Jayant, S., & Srivastava, G. (2023). close-packed quad-element triple-band-notched UWB MIMO antenna with upgrading capability. IEEE Transactions on Antennas and Propagation, 71(1), 353–360.
Wu, A., Zhao, M., Zhang, P., & Zhang, Z. (2022). A compact four-port MIMO antenna for UWB applications. Sensors, 22(15), 5788.
Funding
This work was supported by the Science and Engineering Research Board (SERB), DST, India, Grant no’s: EEQ/2016/000754.
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The Ch N Phaneendra has done the simulation and validation of the proposed work, and K Kumar Naik has written the manuscript. Two authors have verified the manuscript.
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Phaneendra, C.N., Naik, K.K. Inset-Fed Octagonal-Shaped Quad-Port MIMO Patch Antenna for UWB Applications. Wireless Pers Commun 138, 1311–1327 (2024). https://doi.org/10.1007/s11277-024-11561-x
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DOI: https://doi.org/10.1007/s11277-024-11561-x