A Study of Wideband Dielectric Resonator Antennas Loaded With Special Dispersive Materials

Yang, Xiantao, Bennett, Elliot Leon ORCID: 0000-0003-3798-4296, Calisir, Ilkan, Hua, Qiang, Xiao, Jianliang ORCID: 0000-0003-2010-247X and Huang, Yi ORCID: 0000-0001-7774-1024 (2024) A Study of Wideband Dielectric Resonator Antennas Loaded With Special Dispersive Materials IEEE Open Journal of Antennas and Propagation, 5 (6). p. 1. ISSN 2637-6431, 2637-6431

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Abstract

In this paper, a comprehensive study of wideband dielectric resonator antennas (DRAs) loaded with special dispersive materials is given in detail. The concept and theory for a new class of wideband and compact DRAs are introduced for the first time using the new material whose relative permittivity is inversely proportional to the frequency power of n (i.e., ϵr (f) =k fn k is a constant). Traditional DRAs are normally of limited bandwidth and unstable radiation patterns. The proposed new DRAs exhibit excellent advantages in bandwidth enhancement, size reduction, single-mode purity (predominantly supporting a single mode with minimal interference from other unwanted modes), and stable radiation patterns. The new dielectric resonator theory with wideband resonance characteristics is developed. Based on this, wideband and compact cylindrical and rectangular DRAs are designed and studied. The simulated and measured results demonstrate the merits of the proposed antennas. It is shown that without changing the structures, the percentage bandwidth of the proposed cylindrical DRA made of a dispersive material can be significantly increased to 120%, compared to the DRA using the traditional material with a constant permittivity (4%). The paper provides a new approach for making wideband and compact DRAs with stable radiation patterns for future wideband wireless communications and radar applications.

Item Type:	Article
Uncontrolled Keywords:	Wideband, Permittivity, Resonant frequency, Dielectrics, Resonance, Dispersion, Dielectric resonator antennas, Bandwidth enhancement, compact antennas, dielectric resonator, dielectric resonator antennas, dispersive materials, wideband antennas
Depositing User:	Symplectic Admin
Date Deposited:	13 Sep 2024 14:02
Last Modified:	23 May 2026 09:01
DOI:	10.1109/ojap.2024.3436557
Open Access URL:	https://doi.org/10.1109/OJAP.2024.3436557
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3184491
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