A novel slotted dumbbell-shaped dielectric resonator antenna with enhanced bandwidth for C-band and 5G sub-6 GHz applications

Ravi Chandra; Dileep Kumar Upadhyay

doi:10.1515/freq-2023-0014

Article

A novel slotted dumbbell-shaped dielectric resonator antenna with enhanced bandwidth for C-band and 5G sub-6 GHz applications

Ravi Chandra and Dileep Kumar Upadhyay

Published/Copyright: October 31, 2023

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From the journal Frequenz Volume 78 Issue 1-2

Abstract

This manuscript presents a novel aperture-coupled fed slotted dumbbell-shaped (SDS) dielectric resonator antenna (DRA) with enhanced bandwidth for 5G sub-6 GHz, short-range wireless communications, and C-band applications. The DRA is excited by HEM_11δ mode. The proposed SDS-DRA is designed by assembling the four frustums of conical DRAs with the base and apex of one on top of another. The measured operating frequency of SDS-DRA is from 3.5 GHz to 9.6 GHz (impedance bandwidth of 93.1 %). The SDS-DRA shows a peak gain of 9.7 dBi in the operational frequency range, with an average peak gain of 6.02 dBi. The antenna’s average radiation efficiency is found to be 84.6 %. The proposed SDS-DRA produces omnidirectional-like radiation patterns with significantly low cross-polarization in the broadside direction. The size (l × w × h) of the proposed SDS-DRA is 1.55λ_g × 1.55λ_g × 0.67λ_g where, λ_g is the guided wavelength in mm at 3.5 GHz for effective permittivity (ϵ_eff), 7.1. To validate the simulation results, the proposed antenna structure is built, and its performance is measured. The findings of simulation and measurement results are found to be quite congruent.

Keywords: slotted dumbbell-shaped dielectric resonator antenna (SDS-DRA); aperture coupled; defected ground structure (DGS); hybrid modes; wideband DRA

Corresponding author: Ravi Chandra, Department of Electronics and Communication Engineering, Birla Institute of Technology, Ranchi, 835215, Jharkhand, India, E-mail: rchandra28@gmail.com

Research ethics: We assert that the research presented in this paper is geniune and has been conducted with utmost integrity.
Author contributions: We declare that all authors listed on this paper have made substantial and equal contributions to the research.
Competing interests: We affirmed that there are no conflicts of interest among the authors nor do we have any financial or personal affiliations that could be perceived as influencing that research process or its outcomes.
Research funding: This research has not been funded by any organization.
Data availability: The raw data can be obtained on request from the corresponding author.

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Received: 2023-01-16

Accepted: 2023-10-17

Published Online: 2023-10-31

Published in Print: 2024-01-29

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Articles in the same Issue

https://doi.org/10.1515/freq-2023-0014

Keywords for this article

slotted dumbbell-shaped dielectric resonator antenna (SDS-DRA); aperture coupled; defected ground structure (DGS); hybrid modes; wideband DRA