volume | PIER Journals

Abstract

In this paper, a dual-band modified multiple-input-multiple-output (MIMO) antenna with high isolation is presented and discussed. The proposed compact structure (35 × 25 mm²) consists of two monopole elements and defected ground planes to obtain high impedance bandwidth. Two elliptical-shaped patches are placed orthogonal to each other to obtain high isolation, and a neutralization slit is integrated into the ground plane of each element to further improve the isolation between the elements. The measurement results of the proposed structure show satisfactory agreement with the simulation results. The measured bandwidths are 47.05% (2.6-4.2 GHz) and 64.72% (5.11-10 GHz) at S₁₁ ≤ -10 dB which covers bandwidth requirements of WiMAX (3.4-3.6 GHz, 5.25-5.85 GHz), sub 6 GHz 5G band (3.4-3.8 GHz), WLAN (5.15-5.35 GHz, 5.725-5.825 GHz), and X band satellite communication systems (7.25–8.39 GHz). The designed antenna offers a peak gain of about 9.0 dBi and radiation efficiency of about 92%. The measured minimum isolation is greater than 27.3 dB across the dual band with a maximum value of 73.4 dB. The envelope correlation coefficient (ECC) is below 0.0035, channel capacity loss less than 0.37 bits/s/Hz, and peak diversity gain about 10 dBi.

1. Yussuf, A. A. and S. Paker, "Design of a compact quad-radiating element MIMO antenna for LTE/Wi-Fi application," AEÜ --- Int. J. Electron. Commun., Vol. 111, 152893, 2019.
doi:10.1016/j.aeue.2019.152893 Google Scholar

2. Ding, K., C. Gao, D. Qu, and Q. Yin, "Compact broadband MIMO antenna with parasitic strip," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2349-2353, 2017.
doi:10.1109/LAWP.2017.2718035 Google Scholar

3. Xia, X.-X., Q.-X. Chu, and J.-F. Li, "Design of a compact wideband MIMO antenna for mobile terminals," Progress In Electromagnetics Research C, Vol. 41, 163-174, 2013.
doi:10.2528/PIERC13042104 Google Scholar

4. Sharawi, M. S., A. B. Numan, M. U. Khan, and D. N. Aloi, "A CSRR loaded MIMO antenna system for ISM band operation," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 8, 4265-4274, 2013.
doi:10.1109/TAP.2013.2263214 Google Scholar

5. Debdeep, S. and V. K. Srivastava, "A compact four-element MIMO/diversity antenna with enhanced bandwidth," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2469-2472, 2017. Google Scholar

6. Ming, Y. and J. Zhou, "A compact pattern diversity MIMO antenna with enhanced bandwidth and high-isolation characteristics for WLAN/5G/WiFi applications," Microwave and Optical Technology Letters, 1-12, 2020. Google Scholar

7. Rifaqat, H., A. Ghalib, and M. S. Sharawi, "Annular slot-based miniaturized frequency-agile MIMO antenna system," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2489-2492, 2017. Google Scholar

8. Shi, H., X. Zhang, J. Li, P. Jia, J. Chen, and A. Zhang, "3.6-GHz eight-antenna MIMO array for mobile terminal applications," AEÜ --- Int. J. Electron. Commun., Vol. 95, 342-348, 2018.
doi:10.1016/j.aeue.2018.09.008 Google Scholar

9. Zhang, S. and G. Pedersen, "Mutual coupling reduction for UWB MIMO antennas with a wideband neutralization line," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 166-175, 2015. Google Scholar

10. Wang, Y. and Z. Dun, "A wideband printed dual-antenna system with a novel neutralization line for mobile terminals," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 1428-1431, 2013.
doi:10.1109/LAWP.2013.2287199 Google Scholar

11. Rezvani, M. H. and Z. Yashar, "A dual-band multiple-input multiple-output microstrip antenna with metamaterial structure for LTE and WLAN applications," AEÜ --- Int. J. Electron. Commun., Vol. 93, 277-282, 2018.
doi:10.1016/j.aeue.2018.06.034 Google Scholar

12. Sharawi, M. S., A. B. Numan, M. U. Khan, and D. N. Aloi, "A dual-element dual-band MIMO antenna system with enhanced isolation for mobile terminals," IEEE Antennas and Wireless Propagation Letters, Vol. 11, 1006-1009, 2012.
doi:10.1109/LAWP.2012.2214433 Google Scholar

13. Deng, J. Y., J. Y. Li, L. Zhao, and L. Guo, "A dual-band inverted-F MIMO antenna with enhanced isolation for WLAN applications," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 2270-2273, 2017.
doi:10.1109/LAWP.2017.2713986 Google Scholar

14. Leeladhar, M., M. V. Kartikeyan, and R. K. Panigrahi, "Offset planar MIMO antenna for omnidirectional radiation patterns," International Journal of RF and Microwave Computer Aided Engineering, Vol. 28, No. 6, e21274, 2018.
doi:10.1002/mmce.21274 Google Scholar

15. Amer, T. A., "Novel sun ower MIMO fractal antenna with low mutual coupling and dual wide operating bands," International Journal of Microwave and Wireless Technologies, 1-9, doi.org/10.1017/S1759078719001375. Google Scholar

16. Kumar, A., Q. A. Ansari, B. K. Kanaujia, and J. Kishor, "A novel ITI-shaped isolation structure placed between two-port CPW-fed dual-band MIMO antenna for high isolation," AEÜ --- Int. J. Electron. Commun., Vol. 104, 35-43, 2019.
doi:10.1016/j.aeue.2019.03.009 Google Scholar

17. Deng, J. Y., Z. J. Wang, J. Y. Li, and X. G. Li, "A dual-band MIMO antenna decoupled by a meandering line resonator for WLAN applications," Microwave and Optical Technology Letters, Vol. 60, No. 3, 759-765, 2018.
doi:10.1002/mop.31049 Google Scholar

18. Leeladhar, M., R. K. Panigrahi, and M. V. Kartikeyan, "A 2 × 2 dual-band MIMO antenna with polarization diversity for wireless applications," Progress In Electromagnetics Research C, Vol. 61, 91-103, 2016. Google Scholar

19. Sarkar, D. and K. V. Srivastava, "Compact four-element SRR-loaded dual-band MIMO antenna for WLAN/WiMAX/WiFi/4G-LTE and 5G applications," Electronics Letters, Vol. 53, 1623-1624, 2017.
doi:10.1049/el.2017.2825 Google Scholar

20. Luo, C.-M., J.-S. Hong, and M. Amin, "Mutual coupling reduction for dual-band MIMO antenna with simple structure," Radioengineering, Vol. 26, 51-56, 2017.
doi:10.13164/re.2017.0051 Google Scholar

21. Jiang, W., Y. Cui, B. Liu, and W. Hu, "A dual-band MIMO antenna with enhanced isolation for 5G smartphone applications," IEEE Access, Vol. 7, 112554-112563, 2019.
doi:10.1109/ACCESS.2019.2934892 Google Scholar

22. Liu, Y., L. Yang, Y. Liu, J. Ren, J. Wang, and X. Li, "Dual-band planar MIMO antenna for WLAN application," Microwave and Optical Technology Letters, Vol. 57, No. 10, 2257-2262, 2015.
doi:10.1002/mop.29312 Google Scholar

23. Desde, I., G. Bozdag, and A. Kustepeli, "Multi-band CPW-fed MIMO antenna for Bluetooth WLAN and WiMAX applications," Microwave and Optical Technology Letters, Vol. 58, No. 9, 2182-2186, 2016.
doi:10.1002/mop.30001 Google Scholar

24. Ko, S. C. K. and R. D. Murch, "Compact integrated diversity antenna for wireless communications," IEEE Transactions on Antennas and Propagation, Vol. 49, 954-960, 2001.
doi:10.1109/8.931154 Google Scholar

25. Ramkrishnan, B. K. and G. N. Mulay, "Design of compact multiband pattern diversity antenna for WiMax, LTE and WLAN applications," Microsyst Technol., Vol. 23, 1949-1960, 2017. Google Scholar

26. Mabrouk, I. B., L. Talbi, M. Nedil, and K. Hettak, "MIMO-UWB channel characterization within an underground mine gallery," IEEE Transactions on Antennas and Propagation, Vol. 60, No. 10, 4866-4874, 2012.
doi:10.1109/TAP.2012.2207361 Google Scholar

27. Ramachandran, A., S. Mathew, V. P. Viswanathan, M. Pezholil, and V. Kesavath, "Diversity-based four-port multiple input multiple output antenna loaded with interdigital structure for high isolation," IET Microwaves Antennas Propag., Vol. 10, No. 15, 1633-42, 2016.
doi:10.1049/iet-map.2015.0828 Google Scholar

28. Chandel, R., A. K. Gautam, and K. Rambabu, "Tapered fed compact UWB MIMO-diversity antenna with dual band-notched characteristics," IEEE Transactions on Antennas and Propagation, Vol. 66, 1677-1684, 2018.
doi:10.1109/TAP.2018.2803134 Google Scholar

29. Kumar, A., A. Q. Ansari, B. K. Kanaujia, and J. Kishor, "High isolation compact four-port MIMO antenna loaded with CSRR for multiband applications," Frequenz, Vol. 72, 415-27, 2018.
doi:10.1515/freq-2017-0276 Google Scholar

30. Kumar, A., S. Kumar, Sinha, R. Sinha, and A. Choubey, "Dual circular slot ring triple-band MIMO antenna for 5G applications," Frequenz, Vol. 75, 91-100, 2021.
doi:10.1515/freq-2020-0138 Google Scholar

Dr. Kommanaboyina Vasu Babu

Dr. Sudipta Das

Dr. Soufian Lakrit

Dr. Shobhitkumar Kiritkumar Patel

Professor Boddapati Taraka Phani Madhav

Dr. Hicham Medkour