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Frequency-reconfigurable dielectric resonator antenna using metasurface

Published online by Cambridge University Press:  16 August 2021

Ahmad Abdalrazik Open the ORCID record for Ahmad Abdalrazik [Opens in a new window] ,
Adel B. Abdel-Rahman ,
Ahmed Allam ,
Mohammed Abo-Zahhad ,
Kuniaki Yoshitomi  and
Ramesh K. Pokharel
Ahmad Abdalrazik*
Affiliation:
ECE Department, Egypt-Japan University of Science and Technology, Alexandria 21934, Egypt Electrical Engineering Department, Faculty of Engineering, Port Said University, Port Said, 42524, Egypt
Adel B. Abdel-Rahman
Affiliation:
ECE Department, Egypt-Japan University of Science and Technology, Alexandria 21934, Egypt Electrical Engineering Department, Faculty of Engineering, South Valley University, Qena 83523, Egypt
Ahmed Allam
Affiliation:
ECE Department, Egypt-Japan University of Science and Technology, Alexandria 21934, Egypt
Mohammed Abo-Zahhad
Affiliation:
ECE Department, Egypt-Japan University of Science and Technology, Alexandria 21934, Egypt Electrical and Electronics Engineering Department, Faculty of Engineering, Assiut University, Assiut, Egypt
Kuniaki Yoshitomi
Affiliation:
Faculty of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan
Ramesh K. Pokharel
Affiliation:
Faculty of Information Science and Electrical Engineering, Kyushu University, Fukuoka 819-0395, Japan
*
Author for correspondence: Ahmad Abdalrazik, E-mail: [email protected]
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Abstract

In this paper, we propose a frequency-reconfigurable antenna structure consisting of a dielectric resonator (DR) topped by a superstrate material. Two metasurfaces (MSs) are placed upon the DR and the superstrate, where these two MSs are utilized to synthesize a localized reduction of the dielectric constant of the DR. By placing switches into one of the MSs, the distribution of dielectric constant of the DR can be switched to one of two predefined distributions, which is equivalent to switching the DR length to two different lengths. Consequently, the frequency response of the proposed structure can be tuned to one of two operating bands. The excited modes inside the proposed antenna were obtained analytically and through simulations. Also, the dielectric constant value of substrates topped by MSs was analyzed. The antenna was fabricated and measured, and good agreement between simulation and measurement was attained. The antenna bandwidths are 7–8.1 GHz (14.7%) and 8.5–9.2 GHz (8%) and the gains are 5.1 and 7.8 dB, in the cases of having switches off and on, respectively.

Keywords

Dielectric resonatordielectric constantfrequency reconfigurablemetasurface
Type
Metamaterials and Photonic Bandgap Structures
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 7 , September 2022 , pp. 832 - 838
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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