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Dual-resonance dielectric resonator-based MIMO antenna for Sub-6 GHz 5G and IoT applications

  • Gouri Shankar Sharma , Anshul Gupta ORCID logo EMAIL logo , Ravi Kumar Gangwar and Amit Kr. Pandey
Published/Copyright: March 18, 2025
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Frequenz
From the journal Frequenz Volume 79 Issue 5-6

Abstract

This communication introduces a Multiple Input Multiple Output (MIMO) antenna with dual resonance features, achieved through four dielectric resonators (DR). The design includes two larger (DR-1 and DR-2) and two smaller (DR-3 and DR-4) ceramic resonators (ɛ r = 9.8, tanδ = 0.002) positioned on a fan-shaped FR-4 substrate, fed with a circular ring-shaped aperture for generation of lower and upper-frequency bands respectively. The fan-shaped substrate, combined with an arc-shaped defective ground structure (DGS), is used to intensify the bandwidth of the lower band and improve the isolation between radiating DRs. The measured operating bands for larger-sized DRs are found to be 2.7 GHz–4.12 GHz (41.6 % fractional bandwidth (FBW)) and 2.7 GHz–4.2 GHz (43.47 % FBW), while for smaller-sized DRs are depicted to be 5.21 GHz–5.96 GHz (13.29 % FBW) and 5.21 GHz–6.12 GHz (15.93 % FBW) respectively. The measured isolations in the lower and upper bands at resonant frequencies 3.6 GHz and 5.5 GHz are determined to be better than −31.2 dB and −24.5 dB, respectively. The closeness between simulated and measured results makes the proposed antenna appropriate for Sub-6 GHz wireless applications like WLAN (5.25–5.95 GHz), WiMAX (3.3–3.8 GHz), 5G (n48, n77, n78 bands), and Wi-Fi (n46) enabled IoT.

Keywords: dual-resonance; dielectric resonator; fan-shaped; isolation; multiple input multiple output
Corresponding author: Anshul Gupta, Department of Electronics and Communication Engineering, National Institute of Technology, Raipur, Chhattisgarh, India, E-mail:

  1. Research ethics: Not applicable.

  2. Informed consent: Informed consent was obtained from all individuals included in this study, or their legal guardians or wards.

  3. Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  4. Use of Large Language Models, AI and Machine Learning Tools: None declared.

  5. Conflict of interests: The authors state no conflict of interest.

  6. Research funding: None declared.

  7. Data availability: Not applicable.

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Received: 2024-07-02
Accepted: 2025-02-19
Published Online: 2025-03-18
Published in Print: 2025-06-26

© 2025 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

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https://doi.org/10.1515/freq-2024-0213
Keywords for this article
dual-resonance; dielectric resonator; fan-shaped; isolation; multiple input multiple output

Articles in the same Issue

  1. Frontmatter
  2. Accurate channel estimation of on-grid partially coherent compressive phase retrieval for mmWave massive MIMO systems
  3. Bandwidth enhancement of resonating absorber using a lossy dielectric layer for RCS reduction in X-band
  4. Graphene-based tunable dual-band polarization sensitive absorber for applications in the terahertz regime
  5. Graphene-based compact polarization-insensitive broadband terahertz absorber for sensing applications
  6. Broadband metasurface-based reflective polarization converter
  7. Using one-dimensional thinned antenna arrays to form a two-dimensional MIMO antenna array
  8. Dual-resonance dielectric resonator-based MIMO antenna for Sub-6 GHz 5G and IoT applications
  9. Implantable F-shaped antenna with 93.32 Mbps speed for Intra-body communications
  10. Frequency and pattern reconfigurable arrow shape patch antenna with a PIN diode
  11. Data driven modeling for linearization of particle accelerator RF power source
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