volume | PIER Journals

Abstract

This article proposes a four-port multiple input multiple output (MIMO) ultra-wideband (UWB) antenna that operates across 3 to 13 GHz. Four identical fractal patches are placed orthogonally to each other. The uniqueness of the proposed design is that it does not need to incorporate any dedicated/specific design/component to realize notches within the UWB range. The elimination of notches, enhancement of bandwidth, and improvement of isolation have been achieved by integrating a resistance-loaded stub with the ground plane. The isolation between the elements was measured to be below -20 dB across the entire operating band. The fabricated prototype exhibits better diversity parameters like envelop correlation coefficient (ECC) < 0.003, diversity gain (DG) > 9.99, channel capacity loss (CCL) < 0.4 bps/Hz, and mean effective gain (MEG) < 2 dB. The proposed MIMO antenna shows omnidirectional radiation patterns with a peak gain of 5.4 dBi and radiation efficiency > 66% with required compactness having interelement (edge to edge) distance of 5.4 mm. After application of decoupling method radiation efficiency varies from 66% to 82% with gain ranging between 1.8 and 5.54 dBi. The diverse performance of the fabricated MIMO proves it to be a good candidate for UBW imaging, LTE applications, and S, C, and X band applications.

1. Cicchetti, R., E. Miozzi, and O. Testa, "Wideband and UWB antennas for wireless applications: A comprehensive review," International Journal of Antennas and Propagation, Vol. 2017, Article ID 2390808, 45 pages, 2017.

2. Alibakhshi-Kenari, M., M. Naser-Moghadasi, R. Ali Sadeghzadeh, B. Singh Virdee, and E. Limiti, "New compact antenna based on simplified CRLH-TL for UWB wireless communication systems," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 26, No. 3, 217-225, 2016.
doi:10.1002/mmce.20956

3. Alibakhshi-Kenari, M., M. Naser-Moghadasi, R. Ali Sadeghzadeh, and B. Singh Virdee, "Metamaterial-based antennas for integration in UWB transceivers and portable microwave handsets," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 26, No. 1, 88-96, 2016.
doi:10.1002/mmce.20942

4. Alibakhshi-Kenari, M. and M. Naser-Moghadasi, "Novel UWB miniaturized integrated antenna based on CRLH metamaterial transmission lines," AEU - International Journal of Electronics and Communications, Vol. 69, No. 8, 1143-1149, 2015.
doi:10.1016/j.aeue.2015.04.017

5. Sadeghzadeh, R. A., M. Alibakhshikenari, and M. Naser-Moghadasi, "UWB antenna based on SCRLH-TLs for portable wireless devices," Microwave and Optical Technology Letters, Vol. 58, No. 1, 69-71, 2016.
doi:10.1002/mop.29491

6. Sadeghzadeh, R. A., M. Alibakhshi-Kenari, and M. Naser-Moghadasi, "Composite right-left-handed-based antenna with wide applications in very-high frequency-ultra-high frequency bands for radio transceivers," IET Microwaves, Antennas & Propagation, Vol. 9, No. 15, 1713-1726, December 10, 2015.

7. Alibakhshi Kenari, M., "Design and modeling of new UWB metamaterial planar cavity antennas with shrinking of the physical size for modern transceivers," International Journal of Antennas and Propagation, 1-12, 2013.
doi:10.1155/2013/562538

8. Alibakhshikenari, M., B. S. Virdee, L. Azpilicueta, et al. "A comprehensive survey of ``metamaterial transmission-line based antennas: Design, challenges, and applications''," IEEE Access, Vol. 8, 144778-144808, 2020.
doi:10.1109/ACCESS.2020.3013698

9. Alibakhshikenari, M., E. M. Ali, M. Soruri, et al. "A comprehensive survey on antennas on-chip based on metamaterial, metasurface, and substrate integrated waveguide principles for millimeter-waves and terahertz integrated circuits and systems," IEEE Access, Vol. 10, 3668-3692, 2022.
doi:10.1109/ACCESS.2021.3140156

10. Nadeem, I., M. Alibakhshikenari, F. Babaeian, et al. "A comprehensive survey on ``circular polarized antennas'' for existing and emerging wireless communication technologies," Journal of Physics D: Applied Physics, Vol. 55, No. 3, 033002, October 18, 2021.
doi:10.1088/1361-6463/ac2c36

11. Alibakhshikenari, M., B. S. Virdee, C. H. See, et al. "Dual-polarized highly folded bowtie antenna with slotted self-grounded structure for sub-6 GHz 5G applications," IEEE Transactions on Antennas and Propagation, Vol. 70, No. 4, 3028-3033, April 2022.
doi:10.1109/TAP.2021.3118784

12. Alibakhshikenari, M., S. M. Moghaddam, A. Uz Zaman, J. Yang, B. S. Virdee, and E. Limiti, "Wideband sub-6 GHz self-grounded bow-tie antenna with new feeding mechanism for 5G communication systems," 2019 13th European Conference on Antennas and Propagation (EuCAP), 1-4, 2019.

13. Kowalewski, J., J. Eisenbeis, M. Tingulstad, Z. Kollar, and T. Zwick, "Design method for capacity enhancement of pattern-reconfigurable MIMO vehicular antennas," IEEE Antennas Wirel. Propag. Lett., Vol. 18, 2557-2561, 2019.
doi:10.1109/LAWP.2019.2943205

14. Vasu Babu, K. and B. Anuradha, "Design of Wang shape neutralization line antenna to reduce the mutual coupling in MIMO antennas," Analog. Integr. Circ. Sig. Process., Vol. 101, 67-76, 2019.
doi:10.1007/s10470-019-01397-y

15. Gorai, A., A. Dasgupta, and R. Ghatak, "A compact quasi-self-complementary dual band notched UWB MIMO antenna with enhanced isolation using Hilbert fractal slot," International Journal of Electronics and Communications, 2018.

16. Mohanty, A. and S. Sahu, "High isolation two-port compact MIMO fractal antenna with Wi-Max and X-band suppression characteristics," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, 1-11, 2019.

17. Singh, H. S., G. K. Pandey, P. K. Bharti, and M. K. Meshram, "Design and performance investigation of a low-profile MIMO/diversity antenna for WLAN/WiMAX/HIPERLAN applications with high isolation," Int. J. RF Microw., Vol. 25, 510-521, 2015.
doi:10.1002/mmce.20886

18. 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, 415-427, 2018.
doi:10.1515/freq-2017-0276

19. Chouhan, S., D. K. Panda, V. S. Kushwah, and S. Singhal, "Spider-shaped fractal MIMO antenna for LAN/WiMAX/Wi-Fi/Bluetooth/C-band applications," AEU - International Journal of Electronics and Communications, Vol. 110, 152871, 2019, ISSN 1434-8411.
doi:10.1016/j.aeue.2019.152871

20. Sree, G. N. J. and S. Nelaturi, "Design and experimental verification of fractal based MIMO antenna for lower sub 6-GHz 5G applications," AEU - International Journal of Electronics and Communications, Vol. 137, 153797, 2021, ISSN 1434-8411.
doi:10.1016/j.aeue.2021.153797

21. Alibakhshikenari, M., A. Salvucci, G. Polli, et al. "Mutual coupling reduction using metamaterial supersubstrate for high performance & densely packed planar phased arrays," 2018 22nd International Microwave and Radar Conference (MIKON), 675-678, 2018.
doi:10.23919/MIKON.2018.8405323

22. Alibakhshikenari, M., B. S. Virdee, and E. Limiti, "A technique to suppress mutual coupling in densely packed antenna arrays using metamaterial supersubstrate," 12th European Conference on Antennas and Propagation (EuCAP 2018), London, UK, April 9-13, 2018.

23. Alibakhshikenari, M., B. S. Virdee, C. H. See, R. A. Abd-Alhameed, F. Falcone, and E. Limiti, "Array antenna for synthetic aperture radar operating in X and Ku-bands: A study to enhance isolation between radiation elements,", 1083-1087, Aachen, Germany, June 4-7, 2018.

24. Alibakhshikenari, M., M. Vittori, S. Colangeli, et al. "EM isolation enhancement based on metamaterial concept in antenna array system to support full-duplex application," 2017 IEEE Asia Pacific Microwave Conference (APMC), 740-742, 2017.
doi:10.1109/APMC.2017.8251553

25. Alibakhshikenari, M., B. S. Virdee, C. H. See, R. Abd-Alhameed, F. Falcone, and E. Limiti, "A new waveguide slot array antenna with high isolation and high antenna bandwidth operation on Ku- and K-bands for radar and MIMO systems," 2018 15th European Radar Conference (EuRAD), 401-404, 2018.
doi:10.23919/EuRAD.2018.8546589

26. Bukkawar, S. and V. Ahmed, "Compact slot-loaded ultra-wideband multiple input multiple-output antenna with fractal inspired isolator," Int. J. RF Microw. Comput. Aided Eng., e22036, 2019.

27. Biswal, S. P. and S. Das, "A compact printed ultra-wideband multiple-input multiple output prototype with band-notch ability for WiMAX, LTEband43, and WLAN systems," Int. J. RF Microw. Comput. Aided Eng., e21673, 2019.
doi:10.1002/mmce.21673

28. Hasan, M. N., S. Chu, and S. Bashir, "A DGS monopole antenna loaded with U-shape stub for UWB MIMO applications," Microw. Opt. Technol. Lett., 1-9, 2019.

29. Rajkumar, S., K. T. Selvan, and P. H. Rao, "Compact 4 element Sierpinski Knopp fractal UWB MIMO antenna with dual band notch," Microw. Opt. Technol. Lett., Vol. 60, 1023-1030, 2018.
doi:10.1002/mop.31092

30. Gurjar, R., D. K. Upadhyay, B. K. Kanaujia, and A. Kumar, "A compact modified Sierpinski carpet fractal UWB MIMO antenna with square-shaped funnel-like ground stub," AEU - International Journal of Electronics and Communications, 153126, 2020.
doi:10.1016/j.aeue.2020.153126

31. Banerjee, J., A. Karmakar, R. Ghatak, and D. R. Poddar, "Compact CPW-fed UWB MIMO antenna with a novel modified Minkowski fractal Defected Ground Structure (DGS) for high isolation and triple band-notch characteristic," Journal of Electromagnetic Waves and Applications, Vol. 31, No. 15, 1550-1565, 2017.
doi:10.1080/09205071.2017.1354727

32. Althuwayb, A. A., "Low-interacted multiple antenna systems based on metasurface-inspired isolation approach for MIMO applications," Arab. J. Sci. Eng., Vol. 47, 2629-2638, 2022.
doi:10.1007/s13369-021-05720-6

33. Alibakhshikenari, M., E. M. Ali, M. Soruri, et al. "A comprehensive survey on antennas on-chip based on metamaterial, metasurface, and substrate integrated waveguide principles for millimeter-waves and terahertz integrated circuits and systems," IEEE Access, Vol. 10, 3668-3692, 2022.
doi:10.1109/ACCESS.2021.3140156

34. Shrivishal, T., M. Akhilesh, and Y. Sandeep, "A compact octagonal fractal UWB MIMO antenna with WLAN band-rejection," Microwave and Optical Technology Letters, Vol. 57, No. 8, 1919-1925, 2015.
doi:10.1002/mop.29220

35. Tripathi, S., A. Mohan, and S. Yadav, "A compact Koch fractal UWB MIMO antenna with WLAN band-rejection," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1565-1568, 2015.
doi:10.1109/LAWP.2015.2412659

36. Rekha, V. S. D., P. Pardhasaradhi, B. T. P. Madhav, and Y. U. Devi, "Dual band notched orthogonal 4-element MIMO antenna with isolation for UWB applications," IEEE Access, Vol. 8, 145871-145880, 2020.
doi:10.1109/ACCESS.2020.3015020

37. Sharma, M., V. Dhasarathan, S. K. Patel, and T. Khang Nguyen, "An ultra-compact four-port 4×4 superwideband MIMO antenna including mitigation of dual notched bands characteristics designed for wireless network applications," International Journal of Electronics and Communications, Vol. 123, 153332, 2020.
doi:10.1016/j.aeue.2020.153332

38. Raheja, D. K., B. K. Kanaujia, and S. Kumar, "Compact four-port MIMO antenna on slotted-edge substrate with dual-band rejection characteristics," Int. J. RF Microw. Comput. Aided Eng., e21756, 2019.
doi:10.1002/mmce.21756

39. Verdhan Singh, H. and S. Tripathi, "Compact UWB MIMO antenna with fork-shaped stub with Vias Based Coupling Current Steering (VBCCS) to enhance isolation using CMA," International Journal of Electronics and Communications, Vol. 129, 153550, 2021.
doi:10.1016/j.aeue.2020.153550

40. Gómez-Villanueva, R. and H. Jardón-Aguilar, "Compact UWB uniplanar four-port MIMO antenna array with rejecting band," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 12, 2543-2547, December 2019.
doi:10.1109/LAWP.2019.2942827

41. Tripathi, S., A. Mohan, and S. Yadav, "A compact Koch fractal UWB MIMO antenna with WLAN band-rejection," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1565-1568, 2015.
doi:10.1109/LAWP.2015.2412659

42. Alam, T., S. R. Thummaluru, and R. K. Chaudhary, "Integration of MIMO and cognitive radio for sub-6 GHz 5G applications," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 10, 2021-2025, October 2019.
doi:10.1109/LAWP.2019.2936312

43. Saxena, G., Y. K. Awasthi, and P. Jain, "Four-element pentaband MIMO antenna for multiple wireless application including dual-band circular polarization characteristics," International Journal of Microwave and Wireless Technologies, 1-12, 2021.

44. Yin, W., S. Chen, J. Chang, C. Li, and S. K. Khamas, "CPW fed compact UWB 4-element MIMO antenna with high isolation," Sensors, Vol. 21, No. 8, 2688, 2021.
doi:10.3390/s21082688

45. Alibakhshikenari, M., B. S. Virdee, I. C. See, R. A. Abd-Alhameed, F. Falcone, A. Andújar, J. Anguera, and E. Limiti, "Study on antenna mutual coupling suppression using integrated metasurface isolator for SAR and MIMO applications," 2018 48th European Microwave Conference (EuMC), 1425-1428, Madrid, Spain, September 25-27, 2018.

46. Mark, R., N. Mishra, K. Mandal, P. Pratim Sarkar, and S. Das, "Hexagonal ring fractal antenna with dumb bell shaped defected ground structure for multiband wireless applications," International Journal of Electronics and Communications, Vol. 94, 42-50, 2018.
doi:10.1016/j.aeue.2018.06.039

47. Thummaluru, S. R., M. Ameen, and R. K. Chaudhary, "Four-port MIMO cognitive radio system for midband 5G applications," IEEE Transactions on Antennas and Propagation, Vol. 67, No. 8, 5634-5645, August 2019.
doi:10.1109/TAP.2019.2918476

48. Sharawi, M. S., "Printed multi-band MIMO antenna systems and their performance metrics," IEEE Antennas Propag. Mag., Vol. 55, No. 5, 219-232, 2013.
doi:10.1109/MAP.2013.6735522

49. Naik, M. N. and H. G. Virani, "A compact four port MIMO antenna for millimeterwave applications," Bulletin of Electrical Engineering and Informatics, Vol. 11, No. 2, 2022.
doi:10.11591/eei.v11i2.3689

50. Karaboikis, M. P., V. C. Papamichael, G. F. Tsachtsiris, C. F. Soras, and V. T. Makios, "Integrating compact printed antennas onto small diversity/MIMO terminals," IEEE Trans. Antennas Propag., Vol. 56, No. 7, 2067-2078, 2008.
doi:10.1109/TAP.2008.924677

Mr. Sumit Kumar Gupta

Dr. Robert Mark

Dr. Kaushik Mandal

Dr. Soma Das