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International Journal of Antennas and Propagation
Volume 2017, Article ID 2414619, 11 pages
Research Article

Wideband Cylindrical Dielectric Resonator Antenna Operating in HEM11δ Mode with Improved Gain: A Study of Superstrate and Reflector Plane

1Department of Electronics and Communication Engineering, National Institute of Technology, Silchar, India
2School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
3Institute for Infocomm Research, Singapore

Correspondence should be addressed to Taimoor Khan; moc.liamg@roomiatk

Received 15 March 2017; Revised 14 May 2017; Accepted 13 June 2017; Published 20 July 2017

Academic Editor: Ikmo Park

Copyright © 2017 Sounik Kiran Kumar Dash et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A wideband and high gain dielectric resonator antenna (DRA) operating in hybrid HEM11δ mode is proposed. The investigated geometry employs one cylindrical dielectric resonator partially covered with a transparent dielectric superstrate and backed up by a single side metal coated dielectric reflector plane. The reflector is dedicated for gain enhancement while the superstrate is employed for merging of two resonant bands resulting in a single wide band. The dielectric resonator is excited by simple microstrip feed slot coupling technique and operates over X-band, ranging from 7.12 GHz to 8.29 GHz, that is, of 15.18% impedance matching bandwidth with 11.34 dBi peak gain. The different development stages like standalone DRA, DRA with superstrate, DRA with reflector, and DRA with both superstrate and reflector plane with respect to bandwidth and gain performances are analyzed properly. To the best of authors’ knowledge, this is the first time this type of combination of both superstrate and reflector plane is demonstrated in DRA engineering. An antenna prototype was fabricated and characterized and a very good agreement is achieved between the simulated and measured results.