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

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....

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Published in:International journal of microwave and wireless technologies Vol. 13; no. 5; pp. 478 - 485
Main Authors: Boukarkar, Abdelheq, Satouh, Rachdi
Format: Journal Article
Language:English
Published: Cambridge, UK Cambridge University Press 01.06.2021
Subjects:
Antenna Design, Modelling and Measurements
Antennas
Bandwidths
Geometry
Patch antennas
Strip
Patch antenna
resonant modes
bandwidth enhancement
ISSN:1759-0787, 1759-0795
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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.
AbstractList 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.
Author Boukarkar, Abdelheq
Satouh, Rachdi
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Cites_doi 10.1002/9781119038900
10.1109/ICMOCE.2015.7489779
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resonant modes
bandwidth enhancement
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Snippet 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...
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SubjectTerms Antenna Design, Modelling and Measurements
Antennas
Bandwidths
Geometry
Patch antennas
Strip
Title Bandwidth enhancement of compact patch antennas by loading inverted “L” and “T” strips
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