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Design of a sub-6 GHz cylindrical dielectric resonator MIMO antenna

Published online by Cambridge University Press:  09 January 2026

Manoj Kumar Vishwakarma ,
Jugul Kishor Open the ORCID record for Jugul Kishor [Opens in a new window]  and
Jayanta Ghosh
Manoj Kumar Vishwakarma
Affiliation:
National Institute of Technology, Patna, Bihar, India Lloyd Institute of Engineering and Technology, Greater Noida, Uttar Pradesh, India
Jugul Kishor*
Affiliation:
Department of Electronics and Telecommunication Engineering, Dayananda Sagar College of Engineering, Bengaluru, Karnataka, India
Jayanta Ghosh
Affiliation:
National Institute of Technology, Patna, Bihar, India
*
Corresponding author: Jugul Kishor; Email: er.jugulkishor@gmail.com
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Abstract

This paper presents a multiple input multiple output (MIMO) system for sub-6 GHz using a two-port cylindrical dielectric resonator (CDR). This band is ideal for 5G applications, providing a balanced combination of coverage and capacity, as well as offering high data rates and low latency. The proposed MIMO is excited by an aperture-coupled feed structure composed of driven elements consisting of an elliptical-shaped step impedance transform line to enhance CDR coupling. Aperture coupling is used to excite the HEM11δ mode without the involvement of any hybrid mode. The purpose of the aperture coupling in the CDR antenna is to launch the HEM11δ mode, which is a magnetic dipole that provides a stable radiation pattern in the 3.2–3.7 GHz band, allowing for efficient transmission and reception of the data. Symmetrically oriented CDR and the presence of orthogonal fields provide good isolation, which can be further improved by the insertion of an asymmetric cross slot. The designed CDR-based MIMO antenna achieves excellent isolation of over 20 dB and demonstrates improved envelope correlation coefficient (ECC) values, resulting from low field correlation, across the entire frequency band of operation. Almost all the major diversity analysis was carried out for the desired sub-6 GHz band while maintaining a relatively compact size. Based on the measured results, it is confirmed that the proposed CDR-based MIMO antenna is appropriate for sub-6 GHz applications.

Keywords

5Gcylindrical dielectric resonator antenna (CDRA)multiple input multiple output (MIMO)sub-6 GHz antenna

Information

Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 17 , Issue 10 , December 2025 , pp. 1806 - 1817
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Copyright
© The Author(s), 2026. Published by Cambridge University Press in association with The European Microwave Association.

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