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High-gain and broadband SIW cavity-backed slots antenna for X-band applications

Published online by Cambridge University Press:  11 February 2021

Dahbi El khamlichi Open the ORCID record for Dahbi El khamlichi [Opens in a new window] ,
Naima Amar Touhami ,
Tajeddin Elhamadi  and
Mohammed Ali Ennasar
Dahbi El khamlichi*
Affiliation:
Faculty of Sciences, Information Systems & Telecommunication Laboratory (LASIT), Abdelmalek Essaadi University, Tetouan, Morocco
Naima Amar Touhami
Affiliation:
Faculty of Sciences, Information Systems & Telecommunication Laboratory (LASIT), Abdelmalek Essaadi University, Tetouan, Morocco
Tajeddin Elhamadi
Affiliation:
Faculty of Sciences, Information Systems & Telecommunication Laboratory (LASIT), Abdelmalek Essaadi University, Tetouan, Morocco
Mohammed Ali Ennasar
Affiliation:
Smart Systems Laboratory (SSL), National School of Computer Science and Systems Analysis (ENSIAS), Mohamed V University, Rabat, Morocco
*
Author for correspondence: Dahbi El khamlichi, E-mail: [email protected]
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Abstract

Substrate-integrated waveguide (SIW) technology has recently drawn attention to its benefits in the microwave field, such as integration in planar microwave circuits, low manufacturing cost, and high-quality factor compared to other technologies. In this paper, a broadband and high gain SIW cavity-backed L-shaped slot antenna structure has been designed and made for X-band applications. Three pairs of L-shaped half-wave resonators are placed on the lower wall of the cavity (backed-slots) to further expand bandwidth and improve gain. The final antenna designed operates on a band ranging from 9.4 to 10.5 GHz with a bandwidth of 11%. Moreover, the gain reaches a value of 9.5 dBi. The final antenna is realized on a Rogers RT/Duroid 5870 substrate. The gain, the reflection coefficient, and the radiation patterns are measured and compared to the EM simulation results and a very good agreement is obtained. The proposed cavity-backed L-shaped slot antenna gives a good compromise between a high gain and a large bandwidth.

Keywords

Broadband antennacavity-backed slot antennasubstrate-integrated waveguidewaveguide
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 10 , December 2021 , pp. 1078 - 1085
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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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