volume | PIER Journals

Abstract

A dual-band two-element Multiple-Input-Multiple-Output (MIMO) antenna for Wireless Local Area Network (WLAN) applications is proposed in this paper. The MIMO antenna consists of two closely arranged symmetric monopole antennas with edge-to-edge distance of only 5.3 mm (0.044λ at 2.51 GHz). To enhance isolation, a decoupling network is inserted between the two antennas without increasing the footprint. The -10 dB impedance bandwidths in lower and higher frequency bands are 2.46-2.7 GHz and 5.04-5.5 GHz. Compared to previous works, the presented decoupling structure can obtain higher isolation over 30 dB in dual bands. Measured results agree well with the simulated ones.

1., Palandoken and M., "Dual broadband antenna with compact double ring radiators for IEEE 802.11 ac/b/g/n WLAN communication applications," Turkish Journal of Electrical Engineering & Computer Sciences, Vol. 25, 1326-1333, DOI: 10.3906/elk-1507-121, 2016. Google Scholar

2. Palandoken, M., "Arti¯cial materials based microstrip antenna design," Microstrip Antennas, InTech, ISBN: 978-953-307-247-0, 2011. Google Scholar

3. Li, J. F., Q. X. Chu, and T. G. Huang, "A compact wideband MIMO antenna with two novel bent slits," IEEE Trans. Antennas Propag., Vol. 2, No. 60, 482-489, 2012.
doi:10.1109/TAP.2011.2173452 Google Scholar

4. Chiu, C. Y., C. H. Cheng, R. D. Murch, and C. R. Rowell, "Reduction of mutual coupling between closely-packed antenna elements," IEEE Trans. Antennas Propag., Vol. 55, No. 6, 1732-1738, Jun. 2007.
doi:10.1109/TAP.2007.898618 Google Scholar

5. Nandi, S. and A. Mohan, "A compact dual-band MIMO slot antenna for WLAN applications," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 2457-2460, 2017.
doi:10.1109/LAWP.2017.2723927 Google Scholar

6. Su, S. W., C. T. Lee, and F. S. Chang, "Printed MIMO-antenna systems using neutralization-line technique for wireless USB-dongle applications," IEEE Trans. Antennas Propag., Vol. 60, No. 2, 456-463, 2012.
doi:10.1109/TAP.2011.2173450 Google Scholar

7. Wang, Y. and Z.-W. Du, "A wideband printed dual-antenna with three neutralization lines for mobile terminals," IEEE Trans. Antennas Propag., Vol. 62, No. 3, 1495-1499, Mar. 2014.
doi:10.1109/TAP.2013.2295226 Google Scholar

8. Ling, X. and R. Li, "A novel dual-band MIMO antenna array with low mutual coupling for portable wireless devices," IEEE Antennas Wireless Propag. Lett., Vol. 10, 1039-1042, 2011.
doi:10.1109/LAWP.2011.2169035 Google Scholar

9. Mak, A. C. K., C. R. Rowell, and R. D. Murch, "Isolation enhancement between two closely packed antennas," IEEE Trans. Antennas Propag., Vol. 56, No. 11, 3411-3419, Nov. 2008.
doi:10.1109/TAP.2008.2005460 Google Scholar

10. Lau, B. K. and J. B. Andersen, "Simple and e±cient decoupling of compact arrays with parasitic scatterers," IEEE Trans. Antennas Propag., Vol. 60, No. 2, 464-472, Feb. 2012.
doi:10.1109/TAP.2011.2173440 Google Scholar

11. Li, R. P., P. Wang, Q. Zheng, and R. Z. Wu, "Compact microstrip decoupling and matching network for two symmetric antennas," Electron. Lett., Vol. 51, No. 18, 1396-1398, 2015.
doi:10.1049/el.2015.1738 Google Scholar

12. Zhao, L., L. K. Yeung, and K.-L. Wu, "A coupled resonator decoupling network for two-element compact antenna arrays in mobile terminals," IEEE Trans. Antennas Propag., Vol. 62, No. 5, 482-489, 2014.
doi:10.1109/TAP.2014.2308547 Google Scholar

13. Khan, M. S., M. F. Shafique, A. Naqvi, A. D. Capobianco, B. Ijaz, and B. D. Braaten, "A miniaturized dual-band diversity antenna for WLAN applications," IEEE Antennas Wirel. Propag. Lett., Vol. 14, 958-961, 2015.
doi:10.1109/LAWP.2014.2387701 Google Scholar

14. Xue, C.-D., X.-Y. Zhang, Y.-F. Cao, Z.-J. Hou, and C.-F. Ding, "MIMO antenna using hybrid electric and magnetic coupling for isolation enhancement," IEEE Trans. Antennas Propag., Vol. 65, No. 10, 5162-5170, 2017.
doi:10.1109/TAP.2017.2738033 Google Scholar

15. 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 Wirel. Propag. Lett., Vol. 11, 1006-1009, 2012.
doi:10.1109/LAWP.2012.2214433 Google Scholar

16. Li, Q. L., S. W. Cheung, D. Wu, and T. I. Yuk, "Optically transparent dual-band MIMO antenna using micro-metal mesh conductive film for WLAN system," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 920-923, 2017.
doi:10.1109/LAWP.2016.2614577 Google Scholar

17. Cheung, S.-W., Q.-L. Li, D. Wu, C.-F. Zhou, and B. Wang, "Defected ground structure with two resonances for decoupling of dual-band MIMO antenna," IEEE International Symposium on AP-S&/USNC/URSI, 1645-1646, 2017. Google Scholar

18. Khan, M. S., M. F. Shafique, A. D. Capobianco, E. Autizi, I. Shoaib, and I. Ali, "Compact UWB-MIMO antenna array with a floating digitated decoupling structure," IET Microwaves, Antennas & Propagation, Vol. 8, No. 10, 747-753, Mar. 2014.
doi:10.1049/iet-map.2013.0672 Google Scholar

Dr. Peng Liu

Dr. Deming Sun

Dr. Peng Wang

Prof. Peng Gao