volume | PIER Journals

Abstract

A compact Ultra-Wideband (UWB) Multiple-Input Multiple-Output (MIMO) antenna with a culturally inspired radiating structure is developed in this study. The radiating element is inspired by the traditional gonjong shape of Minangkabau architecture, which resembles upward-curving buffalo horns, forming a distinctive roof-like patch that enhances the impedance characteristics. A 50-ohm microstrip line is used to excite the patch, with a partial ground plane placed beneath the patch. To improve bandwidth and support low-frequency operation, an L-shaped strip is introduced on the ground plane, and the patch is optimized through edge modification and parametric analysis. The antenna achieves a wide measured impedance bandwidth of 2.2-20 GHz (S₁₁ < -10 dB), fully covering and extending beyond the Federal Communications Commission (FCC)-defined UWB range. High isolation is achieved with S₁₂ consistently below -20 dB across the band. Excellent MIMO performance is demonstrated with an envelope correlation coefficient (ECC) below 0.01, diversity gain (DG) above 9.95 dB, channel capacity loss (CCL) lower than 0.4 bit/s/Hz, and Total Active Reflection Coefficient (TARC) below -10 dB. The antenna also exhibits stable radiation patterns and maintains high efficiency throughout the operating band. With overall dimensions of just 30 × 30 mm², the developed antenna is more compact than most recent UWB MIMO designs, making it highly suitable for modern wireless communication systems requiring wide bandwidth and reliable multi-antenna performance.

1. He, Jiefeng, Jinchun Yuan, and Fengchuang Xing, "DVL2024: A larger ultra high definition video dataset for perceptual quality study," IEEE Access, Vol. 13, 40429-40437, 2025.
doi:10.1109/access.2025.3541021

2. Martalò, Marco, Giovanni Pettorru, and Luigi Atzori, "A cross-layer survey on secure and low-latency communications in next-generation IoT," IEEE Transactions on Network and Service Management, Vol. 21, No. 4, 4669-4685, 2024.
doi:10.1109/tnsm.2024.3390543

3. Mohamed, Ehab Mahmoud, Mahmoud Ahmed Abdelghany, and Mahdi Zareei, "An efficient paradigm for multiband WiGig D2D networks," IEEE Access, Vol. 7, 70032-70045, 2019.
doi:10.1109/access.2019.2918583

4. Kaiser, Thomas, Feng Zheng, and Emil Dimitrov, "An overview of ultra-wide-band systems with MIMO," Proceedings of the IEEE, Vol. 97, No. 2, 285-312, 2009.
doi:10.1109/jproc.2008.2008784

5. Bilal, Muhammad, Rashid Saleem, Hammad H. Abbasi, Muhammad Farhan Shafique, and Anthony K. Brown, "An FSS-based nonplanar quad-element UWB-MIMO antenna system," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 987-990, 2017.
doi:10.1109/lawp.2016.2615884

6. U.S. Federal Communications Commission (FCC) "Revision of part 15 of the commission’s rules regarding ultra-wideband transmission systems, first report and order," ET Docket 98-153, FCC 02-48, 56 928–56 935, 2002.
doi:10.1073/pnas.90.12.5574

7. Kumari, Poonam, Ravi Kumar Gangwar, and Raghvendra Kumar Chaudhary, "An aperture-coupled stepped dielectric resonator UWB MIMO antenna with AMC," IEEE Antennas and Wireless Propagation Letters, Vol. 21, No. 10, 2040-2044, 2022.
doi:10.1109/lawp.2022.3189694

8. Chaudhary, Abhishek Kumar and Murli Manohar, "A modified SWB hexagonal fractal spatial diversity antenna with high isolation using meander line approach," IEEE Access, Vol. 10, 10238-10250, 2022.
doi:10.1109/access.2022.3144850

9. Gómez-Villanueva, Ricardo and Hildeberto 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, 2019.
doi:10.1109/lawp.2019.2942827

10. Wang, Lili, Zhonghong Du, Hailong Yang, Ruoyan Ma, Yuchen Zhao, Xueqi Cui, and Xiaoli Xi, "Compact UWB MIMO antenna with high isolation using fence-type decoupling structure," IEEE Antennas and Wireless Propagation Letters, Vol. 18, No. 8, 1641-1645, 2019.
doi:10.1109/lawp.2019.2925857

11. Tang, Zhijun, Xiaofeng Wu, Jie Zhan, Shigang Hu, Zaifang Xi, and Yunxin Liu, "Compact UWB-MIMO antenna with high isolation and triple band-notched characteristics," IEEE Access, Vol. 7, 19856-19865, 2019.
doi:10.1109/access.2019.2897170

12. Yu, Chenyin, Shuhui Yang, Yinchao Chen, Wensong Wang, Li Zhang, Bin Li, and Ling Wang, "A super-wideband and high isolation MIMO antenna system using a windmill-shaped decoupling structure," IEEE Access, Vol. 8, 115767-115777, 2020.
doi:10.1109/access.2020.3004396

13. Jayant, Shailesh and Garima Srivastava, "Close-packed quad-element triple-band-notched UWB MIMO antenna with upgrading capability," IEEE Transactions on Antennas and Propagation, Vol. 71, No. 1, 353-360, 2023.
doi:10.1109/tap.2022.3222768

14. Tripathi, Shrivishal, Akhilesh Mohan, and Sandeep 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

15. Chandel, Richa, Anil Kumar Gautam, and Karumudi Rambabu, "Tapered fed compact UWB MIMO-diversity antenna with dual band-notched characteristics," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 4, 1677-1684, 2018.
doi:10.1109/tap.2018.2803134

16. Liu, Li, S. W. Cheung, and T. I. Yuk, "Compact MIMO antenna for portable UWB applications with band-notched characteristic," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 5, 1917-1924, 2015.
doi:10.1109/tap.2015.2406892

17. Khan, Muhammad Saeed, Antonio-D Capobianco, Sajid M. Asif, Dimitris E. Anagnostou, Raed M. Shubair, and Benjamin D. Braaten, "A compact CSRR-enabled UWB diversity antenna," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 808-812, 2017.
doi:10.1109/lawp.2016.2604843

18. Yao, Yu, Yu Shao, Jiliang Zhang, and Jie Zhang, "A transparent antenna using metal mesh for UWB MIMO applications," IEEE Transactions on Antennas and Propagation, Vol. 71, No. 5, 3836-3844, May 2023.
doi:10.1109/tap.2023.3244003

19. Desai, Arpan, Jayshri Kulkarni, M. M. Kamruzzaman, Štěpán Hubálovský, Heng-Tung Hsu, and Ahmed A. Ibrahim, "Interconnected CPW fed flexible 4-port MIMO antenna for UWB, X, and Ku band applications," IEEE Access, Vol. 10, 57641-57654, 2022.
doi:10.1109/access.2022.3179005

20. Rekha, Vutukuri Sarvani Duti, Pokkunuri Pardhasaradhi, Boddapati Taraka Phani Madhav, and Yalavarthi Usha 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

21. Kumar, Pawan, Shabana Urooj, and Areej Malibari, "Design and implementation of quad-element super-wideband MIMO antenna for IoT applications," IEEE Access, Vol. 8, 226697-226704, 2020.
doi:10.1109/access.2020.3045534

22. Iqbal, Amjad, Omar A. Saraereh, Arbab Waheed Ahmad, and Shahid 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

23. Chen, Zhijian, Weisi Zhou, and Jingsong Hong, "A miniaturized MIMO antenna with triple band-notched characteristics for UWB applications," IEEE Access, Vol. 9, 63646-63655, 2021.
doi:10.1109/access.2021.3074511

24. Chattha, Hassan Tariq, Farah Latif, Farooq A. Tahir, Muhammad Umar Khan, and Xiaodong Yang, "Small-sized UWB MIMO antenna with band rejection capability," IEEE Access, Vol. 7, 121816-121824, 2019.
doi:10.1109/access.2019.2937322

25. MoradiKordalivand, Alishir, Tharek A. Rahman, and Mohsen Khalily, "Common elements wideband MIMO antenna system for WiFi/LTE access-point applications," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 1601-1604, 2014.
doi:10.1109/lawp.2014.2347897

26. Mao, Chun-Xu and Qing-Xin Chu, "Compact coradiator UWB-MIMO antenna with dual polarization," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 9, 4474-4480, Sep. 2014.
doi:10.1109/tap.2014.2333066

27. Hussain, Rifaqat, Mohammad S. Sharawi, and Atif Shamim, "An integrated four-element slot-based MIMO and a UWB sensing antenna system for CR platforms," IEEE Transactions on Antennas and Propagation, Vol. 66, No. 2, 978-983, Feb. 2018.
doi:10.1109/tap.2017.2781220

28. Kobal, Enis, Rui-Jia Liu, Chao Yu, and Anding Zhu, "A high isolation, low-profile, triple-port SIW based annular slot antenna for millimeter-wave 5G MIMO applications," IEEE Access, Vol. 10, 89458-89464, 2022.
doi:10.1109/access.2022.3201143

29. Gao, Peng, Shuang He, Xubo Wei, Ziqiang Xu, Ning Wang, and Yi Zheng, "Compact printed UWB diversity slot antenna with 5.5-GHz band-notched characteristics," IEEE Antennas and Wireless Propagation Letters, Vol. 13, 376-379, 2014.
doi:10.1109/lawp.2014.2305772

30. Kang, Le, Hui Li, Xinhuai Wang, and Xiaowei Shi, "Compact offset microstrip-fed MIMO antenna for band-notched UWB applications," IEEE Antennas and Wireless Propagation Letters, Vol. 14, 1754-1757, 2015.
doi:10.1109/lawp.2015.2422571

31. Saxena, Shobhit, Binod K. Kanaujia, Santanu Dwari, Sachin Kumar, and Rahul Tiwari, "A compact dual-polarized MIMO antenna with distinct diversity performance for UWB applications," IEEE Antennas and Wireless Propagation Letters, Vol. 16, 3096-3099, 2017.
doi:10.1109/lawp.2017.2762426

32. Douhi, Said, Salma Mazroui, Zahriladha Zakaria, Sudipta Das, and Adil Eddiai, "A 4-Port MIMO Antenna featuring multi-band functionality with improved isolation for terahertz systems," IEEE Access, Vol. 13, 132223-132236, 2025.
doi:10.1109/access.2025.3582542

33. Srivastava, Garima, Sachin Kumar, Samah Alshathri, Walid El-Shafai, and Om Prakash Kumar, "Compact UWB MIMO antenna with a modified back reflector and supported by characteristic mode analysis for wireless communication applications," IEEE Access, Vol. 12, 187302-187312, 2024.
doi:10.1109/access.2024.3510931

34. Manteghi, M. and Y. Rahmat-Samii, "Multiport characteristics of a wide-band cavity backed annular patch antenna for multipolarization operations," IEEE Transactions on Antennas and Propagation, Vol. 53, No. 1, 466-474, Jan. 2005.
doi:10.1109/tap.2004.838794

35. Elsharkawy, Rania R., Anwer S. Abd El-Hameed, and Shaza M. El-Nady, "Quad-port MIMO filtenna with high isolation employing BPF with high out-of-band rejection," IEEE Access, Vol. 10, 3814-3824, 2022.
doi:10.1109/access.2021.3134865

36. Shome, Partha Pratim, Taimoor Khan, Ahmed A. Kishk, and Yahia M. M. Antar, "Quad-element MIMO antenna system using half-cut miniaturized UWB antenna for IoT-based smart home digital entertainment network," IEEE Internet of Things Journal, Vol. 10, No. 20, 17964-17976, 2023.
doi:10.1109/jiot.2023.3280628

Dr. Firdaus Firdaus

Dr. Rahmadi Kurnia

Prof. Ikhwana Elfitri