Metamaterial-loaded Circularly Polarized Quad-band SIW MIMO Antenna with Improved Gain for Sub-6 GHz and X-band Applications

作者

  • R. Anandan Department of ECE, Dhanalakshmi Srinivasan College of Engineering and Technology Mamallapuram, Chennai, Tamilnadu, India
  • Sathyasri Balasubramanian Department of ECE, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Avadi Chennai, Tamilnadu, India
  • Ravi Kumar Sanapala Department of ECE, St. Martin’s Engineering College Dhulapally, Secunderabad, Telangana, India
  • Prakash Kamisetti Department of Electrical and Electronics Engineering, Vaagdevi College of Engineering (UGC Autonomous), Bollikunta, Warangal, Telangana, India

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https://doi.org/10.13052/2024.ACES.J.400805

关键词:

Cavity-backed SIW, gain enhancement, metamaterial-loaded antenna, quad-band antenna, sub-6 GHz communication

摘要

This work presents a quad-band metamaterial-loaded cavity-backed substrate integrated waveguide (SIW) MIMO antenna engineered for sub-6 GHz communication standards such as 5G and WLAN, as well as X-band applications. The use of a cavity-backed SIW architecture enables reduced fabrication complexity and straightforward integration with planar circuits, supporting compact and efficient antenna design. The antenna structure incorporates a modified rectangular split ring resonator (RSRR) slot along with an open-ended rectangular slot embedded within the SIW cavity-backed radiator. This configuration generates four resonant bands operating at 2.4, 3.3, 5.0, and 7.0 GHz. To enhance radiation characteristics, modified RSRR-based metamaterial unit cells are placed along the y-direction in front of the radiating elements. These cells contribute significantly to gain enhancement and enable circular polarization at the designated frequencies. The proposed antenna demonstrates realized gains of 5 dB, 8 dB, 6 dB, and 5 dB at the respective bands, supported by a consistent radiation efficiency of approximately 88%. The antenna also exhibits a stable unidirectional radiation pattern across all operating frequencies, making it suitable for directional multi-port MIMO configurations. To suppress inter-element interference, a cavity-backed parasitic structure is introduced, effectively reducing mutual coupling between radiators. Comprehensive MIMO performance analysis is carried out using standard metrics, including envelope correlation coefficient (ECC), total active reflection coefficient (TARC), channel capacity loss (CCL), and mean effective gain (MEG), confirming strong isolation and diversity capability. Experimental validation aligns closely with simulation results, establishing the proposed antenna’s reliability and potential for use in high-performance, multi-band wirelesssystems.

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R. Anandan Associate Professor and Head, Department of Electronics and Communication Engineering, Dhanalakshmi Srinivasan College of Engineering and Technology, ECR, Mamallapuram Chennai, completed his Ph.D. in the Faculty of Information and Communication Engineering from Anna University Chennai in May 2023. His interest includes antenna, optical communication, satellite communication, digital electronics, and wireless communication. He has published seven papers in international conferences and national conferences and four papers in international journals with good impact factors.

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Sathyasri Balasubramanian is currently working as Professor in Vel Tech Rangarajan Dr. Sagunthala R & D Institute of Science and Technology, Avadi, Chennai, Tamil Nadu, India. She has a teaching experience of about 21 years in various engineering colleges. Her research interest includes IoT, Health Care, Network Security and Wireless Communication Networks. She has published more than 35 papers in reputed Journals and Conferences. She is a life member of professional organizations such as Indian Society for Technical Education (ISTE) and Senior member of IEEE.

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Ravi Kumar Sanapala is currently working as an Associate Professor in St. Martin’s Engineering College, Department of Electronics and Communication Engineering. He has completed M.Tech in Electronics and Communication Engineering from Andhra University College of Engineering, Visakhapatnam, Andhra Pradesh, India in the year 2005. He has successfully completed and awarded his Ph.D. in Electronics and Communication Engineering from Jawaharlal Nehru Technological University, Hyderabad, Telangana. India in 2023. He has 18+ years of teaching experience. He has published more than 30 National, International Conferences and Journals including Scopus and SCI. He has published 10 patents and books in different fields. His area of interest includes Wireless Communication, Radar and Microwave Engineering.

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Prakash Kamisetti is working as Professor, Electrical and Electronics Engineering, Vaagdevi College of Engineering, Warangal, India. He has 25 years of experience in teaching and research. He did his B.E. from University of Madras and obtained his MTech and Ph.D. from National Institute of Technology, Warangal. His areas of research are ANN, Meta-Heuristic Techniques, AIML, Smart Grids, Distribution Automationand Distribution System studies. He has published 18 papers in national and international journals. He is a life member of professional organizations such as Indian Society for Technical Education (ISTE) and Senior member of IEEE.

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已出版

2025-08-30

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[1]
R. . Anandan, S. . Balasubramanian, R. K. . Sanapala, 和 P. . Kamisetti, 《Metamaterial-loaded Circularly Polarized Quad-band SIW MIMO Antenna with Improved Gain for Sub-6 GHz and X-band Applications》, ACES Journal, 卷 40, 期 08, 页 724–733, 8月 2025.

期

2025: Vol 40 Iss 8

栏目

General Submission