In this paper a compact planar dual band-notched ultra-wideband (UWB) multiple input multiple output (MIMO) antenna is presented for universal synchronous bus (USB) dongle application with pattern diversity characteristic. The MIMO configuration has orthogonally placed elements with overall size of 16×37.6 mm2, and the common ground plane of the MIMO antenna is further extended by 20 mm for its practical use. The measured and simulated reflection coefficients of the antenna show good impedance bandwidth matching over the range from 3 GHz to 12 GHz excluding the dual notched bands. Both elements show good band-reject property at the notched bands. The simulated results are verified through measurements and calculations. Moreover, absence of decoupling network makes circuit less complex and very compact. Radiation pattern of the MIMO antenna is almost omnidirectional. Furthermore, diversity performance of MIMO antenna is validated with its envelope correlation coefficient (ECC) and pattern diversity characteristic. These characteristics demonstrate its candidacy as a compact dual band-notched UWB MIMO antenna for USB dongle application.
2. Li, H., J. Liu, Z. Wang, and Y.-Z. Yin, "Compact 1 × 2 and 2 × 2 MIMO antennas with enhanced isolation for ultrawideband application," Progress In Electromagnetics Research C, Vol. 71, 41-49, 2017.
doi:10.2528/PIERC16120805
3. Sipal, D., M. P. Abegaonkar, and S. K. Koul, "Easily extendable compact planar UWB MIMO antenna array," IEEE Antennas Wirel. Propag. Lett., Vol. 16, 2328-2331, 2017.
doi:10.1109/LAWP.2017.2717496
4. Zhang, S. and G. F. Pedersen, "Mutual coupling reduction for UWB MIMO antennas with a wideband neutralization line," IEEE Antennas Wirel. Propag. Lett., Vol. 15, 166-169, 2016.
doi:10.1109/LAWP.2015.2435992
5. Sipal, D., M. P. Abegaonkar, and S. K. Koul, "Compact printed UWB MIMO antenna with pattern diversity characteristic for portable devices," 2017 International Symposium on Antennas and Propagation (ISAP), 1-2, 2017.
6. Wani, Z. and D. K. Vishwakarma, "An ultrawideband antenna for portable MIMO terminals," Microw. Opt. Technol. Lett., Vol. 58, No. 1, 51-57, Jan. 2016.
doi:10.1002/mop.29498
7. Sipal, D., M. P. Abegaonkar, and S. K. Koul, "Compact planar 2 × 2 and 4 × 4 UWB MIMO antenna arrays for portable wireless devices," Microw. Opt. Technol. Lett., Vol. 60, No. 1, 86-92, Jan. 2018.
doi:10.1002/mop.30920
8. Iqbal, A., O. A. Saraereh, A. W. Ahmad, and S. Bashir, "Mutual coupling reduction using F-shaped stubs in UWB-MIMO antenna," IEEE Access, Vol. 6, 2755-2759, 2018.
doi:10.1109/ACCESS.2017.2785232
9. Zhao, X., S. P. Yeo, and L. C. Ong, "Planar UWB MIMO antenna with pattern diversity and isolation improvement for mobile platform based on the theory of characteristic modes," IEEE Trans. Antennas Propag., Vol. 66, No. 1, 420-425, Jan. 2018.
doi:10.1109/TAP.2017.2768083
10. Yadav, D., M. P. Abegaonkar, S. K. Koul, V. N. Tiwari, and D. Bhatnagar, "Two element band-notched UWB MIMO antenna with high and uniform isolation," Progress In Electromagnetics Research M, Vol. 63, 119-129, 2018.
doi:10.2528/PIERM17091106
11. Li, J. F., Q. X. Chu, Z. H. Li, and X. X. Xia, "Compact dual band-notched UWB MIMO antenna with high isolation," IEEE Trans. Antennas Propag., Vol. 61, No. 9, 4759-4766, Sep. 2013.
doi:10.1109/TAP.2013.2267653
12. Li, W. T., Y. Q. Hei, H. Subbaraman, X. W. Shi, and R. T. Chen, "Novel printed filtenna with dual notches and good out-of-band characteristics for UWB-MIMO applications," IEEE Microw. Wirel. Compon. Lett., Vol. 26, No. 10, 765-767, Oct. 2016.
doi:10.1109/LMWC.2016.2601298
13. Tang, T. C. and K. H. Lin, "An ultrawideband MIMO antenna with dual band-notched function," IEEE Antennas Wirel. Propag. Lett., Vol. 13, 1076-1079, 2014.
doi:10.1109/LAWP.2014.2329496
14. Tu, S., Y. C. Jiao, Z. Zhang, Y. Song, and S. M. Ning, "Small internal 2.4-GHz/UWB antenna for wireless dongle applications," IEEE Antennas Wirel. Propag. Lett., Vol. 9, 284-287, 2010.
doi:10.1109/LAWP.2010.2047372
15. Shin, J., S. Hong, and J. Choi, "A compact internal UWB antenna for wireless USB dongle application," Microw. Opt. Technol. Lett., Vol. 50, No. 6, 1643-1646, Jun. 2008.
doi:10.1002/mop.23468
16. Zhang, S., B. K. Lau, A. Sunesson, and S. He, "Closely-packed UWB MIMO/diversity antenna with different patterns and polarizations for USB dongle applications," IEEE Trans. Antennas Propag., Vol. 60, No. 9, 4372-4380, Sep. 2012.
doi:10.1109/TAP.2012.2207049
17. Sipal, D., M. P. Abegaonkar, and S. K. Koul, "Compact band-notched UWB antenna for MIMO applications in portable wireless devices," Microw. Opt. Technol. Lett., Vol. 58, No. 6, 1390-1394, Jun. 2016.
doi:10.1002/mop.29804
18. Liu, L., S. W. Cheung, and T. I. Yuk, "Compact MIMO antenna for portable UWB applications with band-notched characteristic," IEEE Trans. Antennas Propag., Vol. 63, No. 5, 1917-1924, May 2015.
doi:10.1109/TAP.2015.2406892
19. Sipal, D., A. Basu, M. P. Abegaonkar, and S. K. Koul, "Planar pattern reconfigurable UWB antenna array for scanning in personal area network application," 2014 International Symposium on Antennas and Propagation Conference Proceedings, 91-92, 2014.
20. Sharawi, M. S., "Current misuses and future prospects for printed multiple-input, multiple-output antenna systems [wireless corner]," IEEE Antennas Propag. Mag., Vol. 59, No. 2, 162-170, Apr. 2017.
doi:10.1109/MAP.2017.2658346
21. Mikki, S. M. and Y. M. M. Antar, "On cross correlation in antenna arrays with applications to spatial diversity and MIMO systems," IEEE Trans. Antennas Propag., Vol. 63, No. 4, 1798-1810, Apr. 2015.
doi:10.1109/TAP.2015.2398113