volume | PIER Journals

Abstract

A compact Sub-6 GHz Multiple-input Multiple-output (MIMO) antenna based on a complementary split-ring resonator (CSRR) and electromagnetic bandgap (EBG) is proposed in this paper. The antenna has an interesting structure and a compact size of 38×38 mm². Four identical antenna elements are deposited orthogonally to each other, using polarization diversity and adding decoupling structures, so that good isolation and miniaturized size can be obtained. The isolation is less than -17.5 dB in the operating bandwidth of 3.28-3.62 GHz and -19.5 dB in 4.78-5.04 GHz. The simulation results are consistent with the measured ones, indicating that the antenna is suitable for Sub-6 GHz communication equipments.

1. Andrews, J. G., et al., "What will 5G be?," IEEE Journal on Selected Areas in Communications, Vol. 32, No. 6, 1065-1082, Jun. 2014.
doi:10.1109/JSAC.2014.2328098

2. Al-Bawri, S. S., M. T. Islam, T. Shabbir, G. Muhammad, M. S. Islam, and H. Y. Wong, Hexagonal shaped near zero index (NZI) metamaterial based MIMO antenna for millimeter-wave application, Vol. 8, 181003-181013, IEEE Access, 2020.

3. Zhao, L. and K. Wu, "A dual-band coupled resonator decoupling network for two coupled antennas," IEEE Transactions on Antennas and Propagat., Vol. 63, No. 7, 2843-2850, Jul. 2015.
doi:10.1109/TAP.2015.2421973

4. Khan, A., S. Bashir, S. Ghafoor, and K. K. Qureshi, "Mutual coupling reduction using ground stub and EBG in a compact wideband MIMO-antenna," IEEE Access, Vol. 9, 40972-40979, 2021.
doi:10.1109/ACCESS.2021.3065441

5. Jamal, M. Y., M. Li, and K. L. Yeung, "Isolation enhancement of closely packed dual circularly polarized MIMO antenna using hybrid technique," IEEE Access, Vol. 8, 11241-11247, 2020.
doi:10.1109/ACCESS.2020.2964902

6. Yin, B., S. Zhao, P. Wang, and X. Feng, "Isolation improvement of compact microbase station antenna based on metasurface spatial filtering," IEEE Transactions on Electromagnetic Compatibility, Vol. 63, No. 1, 57-65, Feb. 2021.
doi:10.1109/TEMC.2020.3004189

7. Khan, M. S., A. Capobianco, S. M. Asif, D. E. Anagnostou, R. M. Shubair, and B. D. Braaten, "A compact CSRR-enabled UWB diversity antenna," IEEE Antennas and Wireless Propagat., Vol. 16, 808-812, 2017.
doi:10.1109/LAWP.2016.2604843

8. Dash, J. C. and D. Sarkar, "A four-port CSRR-loaded dual-band MIMO antenna with suppressed higher order modes," IEEE Access, Vol. 10, 30770-30778, 2022.
doi:10.1109/ACCESS.2022.3160831

9. Ren, Y., K. Li, F. Wang, B. Gao, and H. Wu, "A broadband magnetic coupling microstrip to waveguide transition using complementary split ring resonators," IEEE Access, Vol. 7, 17347-17353, 2019.
doi:10.1109/ACCESS.2019.2895159

10. Abbas, A., N. Hussain, J. Lee, S. G. Park, and N. Kim, "Triple rectangular notch UWB antenna using EBG and SRR," IEEE Access, Vol. 9, 2508-2515, 2021.
doi:10.1109/ACCESS.2020.3047401

11. Al-Hasan, M. J., T. A. Denidni, and A. R. Sebak, "Millimeter-wave compact EBG structure for mutual coupling reduction applications," IEEE Transactions on Antennas and Propagat., Vol. 63, No. 2, 823-828, Feb. 2015.
doi:10.1109/TAP.2014.2381229

12. Deng, H., T. Xu, Y. Xue, F. Liu, and L. Sun, "Closely spaced broadband MIMO differential filtering slotline antenna with CM suppression," IEEE Antennas and Wireless Propagat., Vol. 17, No. 12, 2498-2502, Dec. 2018.
doi:10.1109/LAWP.2018.2879523

13. Boukarkar, A., X. Q. Lin, Y. Jiang, L. Y. Nie, P. Mei, and Y. Q. Yu, "A miniaturized extremely close-spaced four-element dual-band MIMO antenna system with polarization and pattern diversity," IEEE Antennas and Wireless Propagat., Vol. 17, No. 1, 134-137, Jan. 2018.
doi:10.1109/LAWP.2017.2777839

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

15. Jiang, W., Y. Liu, Y. Cui, B. Wang, and S. Gong, "Compact wide-band MIMO antenna with high port isolation," 12th European Conference on Antennas and Propagat., 1-3, 2018.

16. Gomez-Villanueva, R. and H. Jardon-Aguilar, "Compact UWB uniplanar four-port MIMO antenna array with rejecting band," IEEE Antennas and Wireless Propagat., Vol. 18, No. 12, 2543-2547, Dec. 2019.
doi:10.1109/LAWP.2019.2942827

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

18. Saxena, S., B. K. Kanaujia, S. Dwari, S. Kumar, H. C. Choi, and K. W. Kim, "Planar four-port dual circularly-polarized MIMO antenna for sub-6 GHz band," IEEE Access, Vol. 8, 90779-90791, 2020.
doi:10.1109/ACCESS.2020.2993897

Dr. Yufa Sun

Dr. Tao Pan

Dr. Qing Wang

Dr. Fei Huang