Dual-Band MIMO Antenna with Enhanced Isolation for Sub-6 GHz 5G and Wi-Fi Applications

Authors

Keywords:

Dual-band, high isolation, MIMO, WiFi, compact, single layer

Abstract

This paper presents a single-layer dual-band multiple-input-multiple-output (MIMO) antenna with high isolation characteristics for the Sub-6 GHz n79 5G NR band (4.4–5.0 GHz) and 5-GHz Wi-Fi applications. The dual-band MIMO element consists of four-square patches with embedded slots, which are capacitively excited by a probe-fed patch at the center. To achieve high isolation, shorting vias are employed to produce a transmission zero for mutual coupling reduction at both operating frequency bands. The proposed two-port antenna achieves an overall size of 0.94λ×0.47λ×0.02λ at the lowest band of 4.6 GHz. Experimental results show measured bandwidths of 2.8% (4.62 - 4.75 GHz) and 3.9% (5.50 - 5.72 GHz) for the lower and upper bands, respectively. The antenna consistently provides more than 25 dB isolation, together with gains of 4.8–5.4 dBi for the 4.6 GHz band and 5.2–6.8 dBi for the 5.6 GHz band at both individual ports. The proposed design effectively covers the 4.62–4.75 GHz portion of the n79 band and the 5.50–5.72 GHz range for 5-GHz Wi-Fi, accommodating channel bandwidths up to 100 and 160 MHz, respectively.

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Author Biographies

Yem Vu-Van, Hanoi University of Science and Technology

Yem Vu-Van was born in Vietnam in 1975. He received his bachelor’s and master’s degrees from Hanoi University of Science and Technology, Vietnam. He received his Ph.D. in Electronics and Telecommunication Engineering from Télécom ParisTech in 2005. He is currently a full professor in the School of Electrical and Electronic Engineering at Hanoi University of Science and Technology. His main research interests include multi-antenna wireless communication systems, antennas, and ultra-high-frequency techniques.

Thao Hoang-Thi-Phuong, Electric Power University

Thao Hoang-Thi-Phuong was born in Vietnam in 1981. She received her engineering diploma, M.Sc., and Ph.D. in Electronics and Telecommunications from Hanoi University of Science and Technology, Vietnam, in 2004, 2007, and 2019, respectively. She is currently a lecturer in the Faculty of Electronics and Telecommunications at Electric Power University, Vietnam. Her research interests include antenna design, localization systems, machine learning, and wireless communication technology.

Quyen Nguyen-Xuan, Hanoi University of Science and Technology

Quyen Nguyen-Xuan received the Diploma of Engineering, master’s, and Ph.D. degrees in electronics and telecommunications, in 2006, 2008, and 2013, respectively. He was an exchange Ph.D. Student with the Institute for Smart System Technologies, AlpenAdria Klagenfurt University, Austria, from 2011 to 2012. From 2014 to 2015, he was a Postdoctoral Researcher with the Department of Computer Architecture, Polytechnic University of Catalonia (UPC BarcelonaTech), Spain. He was also an Academic Visitor with the Department of Electronic and Computer Engineering, University of Limerick, Ireland, in 2015, the School of Electronics, Electrical Engineering and Computer Science, Queen’s University Belfast, U.K., in 2016, and the Department of Computer and Network Engineering, The University of Electro-Communications, Tokyo, Japan, in 2017. Since 2017, he has been a Senior Lecturer and an Associate Professor with the School of Electrical and Electronic Engineering (SEEE), Hanoi University of Science and Technology (HUST), Vietnam. His research interests include microwave design and implementation, chaos-based digital communications, physical layer security, and wireless communications.

Cuong Do-Manh, Phenikaa University

Cuong Do-Manh serves as a dedicated academic and researcher within the Faculty of Electrical and Electronic Engineering at the PHENIKAA School of Engineering, PHENIKAA University, Hanoi, Vietnam. He is actively engaged in the rigorous study of microwave systems, antenna and propagation, and the practical design of high-performance antennas. His ongoing research initiatives explore modern solutions for efficient wireless transmission and electromagnetic wave behavior, playing a vital role in the scientific output and technological advancements of his institution.

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Published

2026-10-20

How to Cite

Vu-Van, Y., Hoang-Thi-Phuong, T., Nguyen-Xuan, Q., & Do-Manh, C. (2026). Dual-Band MIMO Antenna with Enhanced Isolation for Sub-6 GHz 5G and Wi-Fi Applications. IEEE Latin America Transactions, 24(11), 1416–1423. Retrieved from https://latamt.ieeer9.org/index.php/transactions/article/view/11038

Issue

Vol. 24 No. 11 (2026): Ordinary Issue

Section

Electronics