12-Element SIW MIMO Antenna With an Integrated Self-Triplexing System for Advanced Wireless Services

Authors

Keywords:

MIMO antenna, Integrated self-triplexer MIMO antenna (ISTMA), Isolation, Substrate integrated waveguide

Abstract

This article introduces a novel 12-element MIMO antenna with an integrated self-triplexing system using a substrate-integrated waveguide for advanced wireless communication services. This antenna comprises 12-stepped shaped radiators within a SIW square cavity, each with an individual 50Ω inset-fed line to excite its corresponding radiator. 12-radiators are arranged into three groups with different radiator sizes to achieve self-triplexing operation. Each group contains four identical radiating elements to function as a MIMO antenna system. The proposed integrated MIMO antenna triplexer operates at three distinct frequencies: 4.49 GHz, 6 GHz, and 6.72 GHz, respectively. The antenna is fabricated on a single-layer substrate to validate its performance. The mutual coupling among any radiator is maintained at less than -22.5 dB within the -10 dB impedance bandwidth (IBW). The gain of the proposed antenna is 4.11 dBi, 4.93 dBi, and 6.20 dBi at the respective frequencies. The proposed antenna has an envelope correlation coefficient (ECC) of less than 0.03 at 4.49 GHz, 0.002 at 6 GHz, and 6.72 GHz, with a diversity gain of more than 9.99 dB across all bands. This antenna eliminates the need for additional signal-separation circuits in multi-band MIMO systems due to its inherent band-separation capability.

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Author Biographies

Neeraj Gautam, International Institute of Information Technology, Naya Raipur, Chhattisgarh, India

Neeraj Gautam (Student Member, IEEE) received the Bachelor of Engineering and the M.Tech. degree in electronics and communication engineering from Rajiv Gandhi Proudyogiki Vishwavidyalaya, Bhopal, India, in 2010 and 2018, respectively. He is pursuing a Ph.D. in electronics and communications engineering from the Dr. SPM IIIT-Naya Raipur, India. His research interests mainly focus on the design and analysis of self-multiplexing SIW antennas and MIMO SIW antennas for 5G antennas and circuits, RF and millimeter wave antennas, IoT networks, and advanced wireless communications. His research work was published in IEEE conferences and reputed journals.

Kundan Kumar, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, Punjab, India

Kundan Kumar (Senior Member, IEEE) received his B. Tech in Electronics and Communication Engineering in 2012, M. Tech and Ph.D. in Electronics and Communication Engineering from Indian Institute of Technology (ISM), Dhanbad, Jharkhand, India in year 2015 and 2020 respectively. Dr. Kumar
working as Assistant Professor in the Department of Electronics and Communication Engineering at Dr. B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India. Prior to this, he worked as
an assistant professor in the Department of Electronics and Communication Engineering at PEC Chandigarh and SLIET Longowal, Respectively. Dr. Kumar was continuously qualified seven times
in the Graduate Aptitude Test in Engineering in the subject of Electronics and Communication Engineering, and top 0.76% students in 2013. He was also continuously two times qualified for the National Eligibility Test for Assistant Professor in the subject of Electronics Science under the University Grants Commission in June-2014 and December-2014. Dr. Kumar received the Research Publication Award by IIT Dhanbad in the year of 2017 and the Research Project Award from SLIET Longowal in the year 2023. Dr. Kumar has published 20 research papers in referred International Journals (like IEEE Transactions on Antennas and Propagation, IEEE Antennas and Wireless Propagation Letters, etc.) and Conferences. Dr. Kumar delivered an expert talk at several institutes. He is a regular reviewer of various referred International Journals like IEEE Transactions on Antennas and Propagation, IEEE Antennas and Wireless Propagation Letters and etc. His research interests include 5G antennas and circuits, RF and millimeter wave antennas, intelligent antennas for cognitive radio, characterization of dielectric material, modelling and analysis of substrate-integrated waveguide-based antennas, self-multiplexing antennas, RF planar circuits, RF/microwave sensors, and computational electromagnetics.

Lakhindar Murmu, International Institute of Information Technology, Naya Raipur, Chhattisgarh, India

Lakhindar Murmu (Member, IEEE) received the B.Tech. degree from the Kalyani Government Engineering College, West Bengal University of Technology, Bidhan Nagar, West Bengal, India, in 2009, the M.E. degree from the Indian Institute of Engineering Science and Technology, Shibpur, India, in 2011, and the Ph.D. degree in microwave engineering from the Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India. In 2019, he joined the Dr. Shyama Prasad Mukherjee International Institute of Information Technology, Naya Raipur, India, where he is an assistant professor. He has published several articles in journals and conference proceedings of international repute. His current research interests include planar microstrip antennas, multiband microstrip bandpass filter design, and defected ground structure (DGS) for filter design.

Bipin Chandra Mandi, International Institute of Information Technology, Naya Raipur, Chhattisgarh, India

Bipin Chandra Mandi (Senior Member, IEEE) has been continuing as an Associate Professor in the ECE discipline at the International Institute of Information Technology Naya Raipur (IIIT-NR), India, since June 2018. Before joining IIIT-NR, he was an Ad-hoc faculty member at NIT Jamshedpur, Jharkhand, India, in electrical and electronics engineering from November 2016 to May 2018. Dr. Mandi received a B.E. degree in ECE from Bengal Engineering and Science University, Shibpur, India, in 2009, and an M.E. degree in ECE from Jadavpur University, Kolkata, India, in 2011. He received the Ph.D. degree from the Electrical Engineering Department, Indian Institute of Technology, Kharagpur, India, in 2017. His research interests include digital control of DC–DC converters and VLSI implementation.

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Published

2026-03-14

How to Cite

Gautam, N., Kumar, K., Murmu, L., & Mandi, B. C. (2026). 12-Element SIW MIMO Antenna With an Integrated Self-Triplexing System for Advanced Wireless Services. IEEE Latin America Transactions, 24(4), 422–431. Retrieved from https://latamt.ieeer9.org/index.php/transactions/article/view/10299

Issue

Vol. 24 No. 4 (2026): Ordinary Issue

Section

Electronics