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Bandwidth enhancement of compact patch antennas by loading inverted “L” and “T” strips

Published online by Cambridge University Press:  15 September 2020

Abdelheq Boukarkar Open the ORCID record for Abdelheq Boukarkar [Opens in a new window]  and
Rachdi Satouh
Abdelheq Boukarkar*
Affiliation:
Ècole Supérieure Ali CHABATI, Algiers, Algeria
*
Author for correspondence: Abdelheq Boukarkar, E-mail: abdelheq.boukarkar@gmail.com
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Abstract

We propose simple designs of compact patch antennas with bandwidth enhancement. Firstly, an inverted “L” strip is loaded onto the corner of one radiating patch edge to create an additional resonant mode which can be combined with that one of the conventional patch to enhance the operating bandwidth. Secondly, the “L” strip is replaced by inverted “T” strip to improve further the bandwidth by creating two adjustable resonant modes. The two proposed patch antennas have the particularity of enhancing the bandwidth significantly without increasing their profile and their overall sizes. Two antenna prototypes are fabricated and tested. Measurements reveal that the patch antenna loaded with “L” strip has stable radiation characteristics with 5.2 times enhancement in the relative bandwidth compared with a conventional patch antenna. The antenna loaded with inverted “T” strip has wider bandwidth (6.25 times wider than the conventional patch) and covers the operating band 5.07–5.89 GHz (15%) with measured peak gain and peak efficiency of 6.25 dBi and 78%, respectively. The proposed antennas are easy to fabricate, have a low-profile, and exhibit good performances which make them good candidates to use in real wireless applications.

Keywords

Patch antennabandwidth enhancementresonant modes
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 5 , June 2021 , pp. 478 - 485
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Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press in association with the European Microwave Association

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