Selective high impedance surface active region loading of archimedean spiral antenna

We show that a significant increase in the gain and front-to-back ratio is obtained when different high impedance surface (HIS) sections are placed below the active regions of an Archimedean spiral antenna. The principle of operation is demonstrated at 3, 6, and 9 GHz for an antenna design that empl...

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Main Authors:	Mohamad, Sarah Yasmin, Cahill, Robert, Fusco, Vincent
Format:	Article
Language:	English
Published:	IEEE 2014
Subjects:	TK5101 Telecommunication. Including telegraphy, radio, radar, television
Online Access:	http://irep.iium.edu.my/45454/ http://irep.iium.edu.my/45454/ http://irep.iium.edu.my/45454/ http://irep.iium.edu.my/45454/1/%233_06782322_-_Selective_HIS_active_region_loading_of_Archimedean_spiral_antenna.pdf

id	iium-45454
recordtype	eprints
spelling	iium-454542015-11-09T04:08:13Z http://irep.iium.edu.my/45454/ Selective high impedance surface active region loading of archimedean spiral antenna Mohamad, Sarah Yasmin Cahill, Robert Fusco, Vincent TK5101 Telecommunication. Including telegraphy, radio, radar, television We show that a significant increase in the gain and front-to-back ratio is obtained when different high impedance surface (HIS) sections are placed below the active regions of an Archimedean spiral antenna. The principle of operation is demonstrated at 3, 6, and 9 GHz for an antenna design that employs a ground plane composed of two dissimilar HISs. The unit cells of the HISs are collocated and resonant at the same frequency as the 3- and 6-GHz active regions of the wideband spiral. It is shown that the former HIS must also be designed to resonate at 9 GHz to avoid the generation of a boresight null that occurs because the structure is physically large enough to support higher-order modes. The improvement that is obtained at each of the three frequencies investigated is shown by comparing the predicted and measured radiation patterns for the free space and HIS-backed antenna. IEEE 2014 Article PeerReviewed application/pdf en http://irep.iium.edu.my/45454/1/%233_06782322_-_Selective_HIS_active_region_loading_of_Archimedean_spiral_antenna.pdf Mohamad, Sarah Yasmin and Cahill, Robert and Fusco, Vincent (2014) Selective high impedance surface active region loading of archimedean spiral antenna. IEEE Antennas and Wireless Propagation Letters, 13. pp. 810-813. ISSN 1536-1225 http://dx.doi.org/10.1109/LAWP.2014.2314860 10.1109/LAWP.2014.2314860
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TK5101 Telecommunication. Including telegraphy, radio, radar, television
spellingShingle	TK5101 Telecommunication. Including telegraphy, radio, radar, television Mohamad, Sarah Yasmin Cahill, Robert Fusco, Vincent Selective high impedance surface active region loading of archimedean spiral antenna
description	We show that a significant increase in the gain and front-to-back ratio is obtained when different high impedance surface (HIS) sections are placed below the active regions of an Archimedean spiral antenna. The principle of operation is demonstrated at 3, 6, and 9 GHz for an antenna design that employs a ground plane composed of two dissimilar HISs. The unit cells of the HISs are collocated and resonant at the same frequency as the 3- and 6-GHz active regions of the wideband spiral. It is shown that the former HIS must also be designed to resonate at 9 GHz to avoid the generation of a boresight null that occurs because the structure is physically large enough to support higher-order modes. The improvement that is obtained at each of the three frequencies investigated is shown by comparing the predicted and measured radiation patterns for the free space and HIS-backed antenna.
format	Article
author	Mohamad, Sarah Yasmin Cahill, Robert Fusco, Vincent
author_facet	Mohamad, Sarah Yasmin Cahill, Robert Fusco, Vincent
author_sort	Mohamad, Sarah Yasmin
title	Selective high impedance surface active region loading of archimedean spiral antenna
title_short	Selective high impedance surface active region loading of archimedean spiral antenna
title_full	Selective high impedance surface active region loading of archimedean spiral antenna
title_fullStr	Selective high impedance surface active region loading of archimedean spiral antenna
title_full_unstemmed	Selective high impedance surface active region loading of archimedean spiral antenna
title_sort	selective high impedance surface active region loading of archimedean spiral antenna
publisher	IEEE
publishDate	2014
url	http://irep.iium.edu.my/45454/ http://irep.iium.edu.my/45454/ http://irep.iium.edu.my/45454/ http://irep.iium.edu.my/45454/1/%233_06782322_-_Selective_HIS_active_region_loading_of_Archimedean_spiral_antenna.pdf
first_indexed	2023-09-18T21:04:41Z
last_indexed	2023-09-18T21:04:41Z
_version_	1777410854775422976

Selective high impedance surface active region loading of archimedean spiral antenna

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