A coplanar waveguide (CPW) fed multiple-input multiple-output (MIMO) ultra-wideband (UWB) antenna with high isolation and dual band-notched characteristic is proposed. The antenna consists of two orthogonal circle patches. An annular SRR slot and a rectangular SRR slot are added on the patches to produce two notched bands. High isolation is successfully acquired by adopting a double Y-shaped branch between the two radiation elements. By cutting the fractional substrate, the antenna size has been reduced by 31.4 percent. The measured results show that the working bandwidth of the antenna covers 2.36-12 GHz, and at the same time, the notched bands cover 3.37 GHz-3.98 GHz and 4.71 GHz-5.51 GHz. The isolation is better than 21 dB. The paper also studies the radiation pattern, peak gain, and envelope correlation coefficient (ECC) of the UWB MIMO antenna.
2. Xu, J., C. Du, G. Jin, K. Li, W. Zheng, and Z. Zhao, "A coplanar feed quad-band notched UWB antenna," 2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM), 1-2, Qingdao, China, 2019.
3. Kim, S. and J. Choi, "Two-port UWB MIMO antenna with modified ground for isolation improvement," 2018 International Symposium on Antennas and Propagation (ISAP), 1-2, Busan, Korea (South), 2018.
4. Wu, L. and Y. Q. Xia, "Compact UWB-MIMO antenna with quadband-notched characteristic," International Journal of Microwave and Wireless Technologies, Vol. 9, No. 5, 1147-1153, 2017.
5. Ibrahim, A., M. Abdalla, and Z. Hu, "Design of a compact MIMO antenna with asymmetric coplanar strip-fed for UWB applications," Microwave and Optical Technology Letters, Vol. 59, No. 1, 31-36, 2017.
6. Yang, Z., F. Li, and F. Li, "A compact slot MIMO antenna with band-notched characteristic for UWB application," 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 1-3, 2018.
7. Li, Z., C. Yin, and X. Zhu, "Compact UWB MIMO vivaldi antenna with dual band-notched characteristics," IEEE Access, Vol. 7, No. 99, 38696-38701, 2019.
8. He, Z., Z. Yang, and J. Lv, "Design of a novel band-notched antenna for UWB MIMO communication system," 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 1-3, 2018.
9. Gautam, A., S. Yadav, and K. Rambabu, "Design of ultra-compact UWB antenna with band-notched characteristics for MIMO applications," IET Microwaves, Antennas & Propagation, Vol. 12, No. 12, 1895-1900, 2018.
10. Zhang, J.-Y., W.-P. Tian, Y.-L. Luo, and F. Zhang, "ACS-fed UWB-MIMO antenna with shared radiator," Electronics Letters, Vol. 51, No. 17, 1301-1302, 2015.
11. Hasan, M., S. Chu, and S. Bashir, "A DGS monopole antenna loaded with U-shape stub for UWB MIMO applications," Microwave and Optical Technology Letters, Vol. 61, No. 9, 2141-2149, 2019.
12. He, Z., Z. Yang, and J. Lv, "Design of a novel band-notched antenna for UWB MIMO Communication System," 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT), 1-3, 2018.
13. Li, J., D. Wu, Y. Wu, and G. Zhang, "Dual band-notched UWB MIMO antenna," 2015 IEEE 4th Asia-Pacific Conference on Antennas and Propagation (APCAP), 25-26, Kuta, 2015.
14. Hasan, M., P. Singh, and M. Nadeem, "Omnidirectional UWB antenna loaded with rectangular loop for band notch characteristics," 2019 6th International Conference on Signal Processing and Integrated Networks (SPIN), 425-429, 2019.
15. Singh, H. and S. Tripathi, "Compact UWB MIMO antenna with cross-shaped unconnected ground stub using characteristic mode analysis," Microwave and Optical Technology Letters, Vol. 61, No. 7, 1874-1881, 2019.
16. Roshna, T. K., U. Deepak, V. R. Sajitha, K. Vasudevan, and P. Mohanan, "A compact UWB MIMO antenna with reflector to enhance isolation," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 4, 1873-1877, April 2015.
17. Zhu, J., S. Li, B. Feng, L. Deng, and S. Yin, "Compact dual-polarized UWB quasi-self-complementary MIMO/diversity antenna with band-rejection capability," IEEE Antennas and Wireless Propagation Letters, Vol. 15, 905-908, 2016.
18. Banerjee, J., R. Ghatak, and A. Karmakar, "A compact planar UWB MIMO diversity antenna with Hilbert fractal neutralization line for isolation improvement and dual band notch characteristics," 2018 Emerging Trends in Electronic Devices and Computational Techniques (EDCT), 1-6, Kolkata, 2018.
19. Zhu, J., et al., "Compact CPW UWB diversity slot antenna with dual band-notched characteristics," Microwave and Optical Technology Letters, Vol. 58, No. 4, 989-994, 2016.
20. Zhang, J., L. Wang, and W. Zhang, "A novel dual band-notched CPW-fed UWB MIMO antenna with mutual coupling reduction characteristics," Progress In Electromagnetics Research Letters, Vol. 90, 21-28, 2020.
21. Kumar, A., et al., "An ultra-compact two-port UWB-MIMO antenna with dual band-notched characteristics,", Vol. 114, 152997, 2019.
22. Debnath, P., A. Karmakar, A. Sah, and S. Huda, "UWB MIMO slot antenna with minkowski fractal shaped isolators for isolation enhancement," Progress In Electromagnetics Research M, Vol. 75, 69-78, 2018.
23. Sultan, K. S. and H. H. Abdullah, "Planar UWB MIMO-diversity antenna with dual notch characteristics," Progress In Electromagnetics Research C, Vol. 93, 119-129, 2019.