volume | PIER Journals

Abstract

In this paper, a hexagonal-shaped multiple-input multiple-output (MIMO) patch antenna is presented. It covers the S band (2-4 GHz), WLAN (2400-2480 MHz & 5150-5350/5725-5875 MHz), UWB (3.1-10.6 GHz), and X band (8-12 GHz) applications. The proposed structure is simulated and fabricated on an FR4 substrate with overall dimensions of 0.186λ₀ x 0.373λ₀ and separation of two patches with a distance of 0.053λ₀ (where λ₀ is the wavelength at 2 GHz). The single UWB patch antenna is derived from the triangular-shaped edge cuttings in the bottom of the rectangular patch antenna with partial & defected ground. The proposed MIMO structure produces simulated results from 2 GHz to 13.3 GHz and measured results from 2.1 GHz to 12.9 GHz, with good agreement. The proposed structure resonates at 3.4 GHz, 5.8 GHz, 10.2 GHz and 11.8 GHz. Isolation improved to below -20 dB by placing an E-shaped tree structure and parasitic element. The radiation efficiency and peak gain values are 78-94% and 1.4-6.6 dB, respectively. Diversity performance of the proposed structure is verified with low envelope correlation coefficient (ECC < 0.04), high diversity gain (DG > 9.985), and acceptable total active reflection coefficient (TARC < -10 dB) values.

1. Al-Zayed, A. S., M. A. Al-Bagli, and V. A. Shameena, "Design and analysis of a band-notched staircase ultra-wideband antenna," Progress In Electromagnetics Research C, Vol. 75, 121-130, 2017.
doi:10.2528/PIERC17051508

2. Zarrabi, F. B., A. M. Shire, M. Rahimi, and N. P. Gandji, "Ultra-wideband tapered patch antenna with fractal slots for dual notch application," Microwave and Optical Technology Letters, Vol. 56, No. 6, 1344-1348, 2014.
doi:10.1002/mop.28332

3. Khanjari, S. P., S. Jarchi, and M. M. Taheri, "Compact and wideband planar loop antenna with microstrip to parallel strip balun feed using metamaterials," International Journal of Electron and Communications, Vol. 111, 152883, 2019.
doi:10.1016/j.aeue.2019.152883

4. Kaiser, T., Z. Feng, and E. Dimitrov, "An overview of ultra-wide band systems with MIMO," Proceedings of IEEE, Vol. 97, No. 2, 285-312, 2009.
doi:10.1109/JPROC.2008.2008784

5. Nadeem, I. and D.-Y. Choi, "Study on mutual coupling reduction technique for mimo antennas," IEEE Access, Vol. 7, 563-586, 2019.
doi:10.1109/ACCESS.2018.2885558

6. Liu, L., S. W. Cheung, and T. I. Yuk, "Compact MIMO antenna for portable devices in UWB applications," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 8, 4257-4264, 2013.
doi:10.1109/TAP.2013.2263277

7. Radhi, A. H., R. Nilavalan, Y. Wang, H. S. Al-Raweshidy, A. A. Eltokhy, and N. A. Aziz, "Mutual coupling reduction with a wideband planar decoupling structure for UWB-MIMO antennas," International Journal of Microwave and Wireless Technologies, Vol. 10, No. 10, 1143-1154, 2018.
doi:10.1017/S1759078718001010

8. Chacko, B. P., G. Augustin, and T. A. Denidni, "Uniplanar slot antenna for ultra wide band polarization --- diversity applications," IEEE Antennas and Wireless Propagation Letters, Vol. 12, 88-91, 2013.
doi:10.1109/LAWP.2013.2242841

9. Ren, J., W. Hu, Y. Yin, and R. Fan, "Compact printed MIMO antenna for UWB applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 1517-1520, 2014.

10. Naderia, M., F. B. Zarrabib, F. S. Jafaric, and S. Ebrahimid, "Fractal EBG structure for shielding and reducing the mutual coupling in microstrip patch antenna array," International Journal of Electronics and Communications, Vol. 93, 261-267, 2018.
doi:10.1016/j.aeue.2018.06.028

11. Ouahabi, M. E., A. Zakriti, M. Essaaidi, A. Dkiouak, and H. Elftouh, "A miniaturized dual-band MIMO antenna with low mutual coupling for wireless applications," Progress In Electromagnetics Research C, Vol. 93, 93-101, 2019.
doi:10.2528/PIERC19032601

12. Veeramani, A., A. S. Arezomand, J. Vijayakrishnan, and F. B. Zarrabi, "Compact S-shaped EBG structures for reduction of mutual coupling," IEEE, Fifth International Conference on Advanced Computing & Communication Technologies, 21-25, 2015.

13. Babashah, H., H. R. Hassani, and S. Mohammad-Ali-Nezhad, "A compact UWB printed monopole MIMO antenna with mutual coupling reduction," Progress In Electromagnetics Research C, Vol. 91, 55-67, 2019.
doi:10.2528/PIERC19010905

14. Gao, P., S. He, X. Wei, Z. Xu, N. Wang, and Y. Zheng, "Compact printed UWB diversity slot antenna with 5.5 GHz band-notched characteristics," IEEE Antennas and Wireless Propaga Letters, Vol. 13, 376-379, 2014.
doi:10.1109/LAWP.2014.2305772

15. Wong, K. L., S. W. Su, and Y. L. Kuo, "A printed ultra-wideband diversity monopole antenna," Microwave and Optical Technology Letters, Vol. 38, No. 4, 257-259, 2003.
doi:10.1002/mop.11031

16. Park, J.-D., M. U. Rahman, and H. N. Chen, "Isolation enhancement of wide-band MIMO array antennas utilizing resistive loading," IEEE Access, Vol. 7, 81029-81026, 2019.

17. Li, Q., M. Abdullah, and X. Chen, "Defected ground structure loaded with meandered lines for decoupling of dual-band antenna," Journal of Electromagnetic Waves and Applications, Vol. 33, No. 13, 1764-1775, 2019.
doi:10.1080/09205071.2019.1643261

18. Li, Z., C. Yin, and X. Zhu, "Compact UWB MIMO vivaldi antenna with dual band-notched characteristics," IEEE Access, Vol. 7, 38696-38701, 2019.
doi:10.1109/ACCESS.2019.2906338

19. Wang, L., Z. Du, H. Yang, R. Ma, Y. Zhao, X. Cui, and X. Xi, "Compact UWBMIMO antenna with high isolation using fence-type decoupling structure," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 8, 1641-1645, 2019.
doi:10.1109/LAWP.2019.2925857

20. Tang, T. C. and K. H. Lin, "An ultra wideband MIMO antenna with dual band-notched function," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 1076-1079, 2014.
doi:10.1109/LAWP.2014.2329496

21. Mao, C. X., Q. X. Chu, Y. T. Wu, and Y. H. Qian, "Design and investigation of closely-packed diversity UWB slot-antenna with high isolation," Progress In Electromagnetics Research C, Vol. 41, 13-25, 2013.
doi:10.2528/PIERC13032301

22. Mao, C. X. and Q. X. Chu, "Compact coradiator UWB-MIMO antenna with dual polarization," IEEE Transactions on Antennas and Propagation Letters, Vol. 62, No. 9, 4474-4480, 2014.
doi:10.1109/TAP.2014.2333066

23. Bhattacharya, A., B. Roy, S. K. Chowdhury, and A. K. Bhattacharjee, "An isolation enhanced, printed, low-profile UWB-MIMO antenna with unique dual band-notching features for WLAN and WIMAX," IETE Journal of Research, 1-8, 2019.

24. Mathur, R. and S. Dwari, "Compact CPW-fed ultra wide band MIMO antenna using hexagonal ring monopole antenna elements," International Journal of Electronics and Communications, Vol. 93, 1-6, 2018.
doi:10.1016/j.aeue.2018.05.032

26. Jetti, C. R. and V. R. Nandanavanam, "Trident-shape strip loaded dual band-notched UWB MIMO antenna for portable device applications," International Journal of Electronics and Communications, Vol. 83, 11-21, 2018.
doi:10.1016/j.aeue.2017.08.021

27. Jetti, C. R. and V. R. Nandanavanam, "A very compact MIMO antenna with triple band-notch function for portable UWB systems," Progress In Electromagnetics Research C, Vol. 82, 13-27, 2018.
doi:10.2528/PIERC18011201

28. Chandel, R. and A. K. Gautam, "Design and packaging of an eye-shaped multiple-input-multiple-output antenna with high isolation for wireless UWB applications," IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol. 8, No. 4, 635-642, 2018.
doi:10.1109/TCPMT.2018.2806562

29. Malviya, L. and K. Machavaram, "MIMO antennas with diversity and mutual coupling reduction techniques: A review," International Journal of Microwave and Wireless Technologies, Vol. 9, No. 8, 1763-1780, 2017.
doi:10.1017/S1759078717000538

30. Chae, S. H., W. I. Kawk, S. Park, and K. Lee, "Analysis of mutual coupling in MIMO antenna array by TARC calculation," Asia-Pacific Microwave Conference, 2090-2093, 2006.

31. Jafri, S. I., R. Saleem, M. F. Shafique, and A. K. Brown, "Compact reconfigurable multiple-input-multiple-output antenna for ultra wideband applications," IET Microwaves, Antennas & Propagation, Vol. 10, No. 4, 413-419, 2015.
doi:10.1049/iet-map.2015.0181

Dr. Tathababu Addepalli

Dr. Vaddinuri Rajareddy Anitha