Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application

In this paper, the design of an electronically reconfigurable ground plane composed of a high impedance surface (HIS) based on liquid crystals is presented and used as a backing structure for a two-arm Archimedean spiral antenna. The structure is used to provide electronic switching of two differen...

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Bibliographic Details
Main Authors:	Mohamad, Sarah Yasmin, Cahill, Robert
Format:	Conference or Workshop Item
Language:	English English
Published:	Institute of Electrical and Electronics Engineers Inc. 2017
Subjects:	TK5101 Telecommunication. Including telegraphy, radio, radar, television
Online Access:	http://irep.iium.edu.my/61407/ http://irep.iium.edu.my/61407/ http://irep.iium.edu.my/61407/1/merged%20-%20CAMA%202017.pdf http://irep.iium.edu.my/61407/7/61407_Spiral%20antenna%20with%20reconfigurable%20HIS%20using%20liquid%20crystals_SCOPUS.pdf

id	iium-61407
recordtype	eprints
spelling	iium-614072018-06-28T08:35:42Z http://irep.iium.edu.my/61407/ Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application Mohamad, Sarah Yasmin Cahill, Robert TK5101 Telecommunication. Including telegraphy, radio, radar, television In this paper, the design of an electronically reconfigurable ground plane composed of a high impedance surface (HIS) based on liquid crystals is presented and used as a backing structure for a two-arm Archimedean spiral antenna. The structure is used to provide electronic switching of two different shaped radiation patterns for monopulse radar application; 1) sum-pattern (Σ-pattern), and 2) difference pattern (Δ-pattern). The antenna arrangement is shown to exhibit either the Σ- or the Δ-beam by changing the permittivity (and hence reflection phase) of the HIS reflector when a bias voltage is applied between the periodic array and ground plane. The HIS is demonstrated to resonate at 6 GHz, and numerical results are employed to investigate the performance of the HIS-backed spiral arrangement, i.e. radiation pattern, impedance match, realized gain (Σ-pattern), and null depth (Δ-pattern). Institute of Electrical and Electronics Engineers Inc. 2017-12-04 Conference or Workshop Item NonPeerReviewed application/pdf en http://irep.iium.edu.my/61407/1/merged%20-%20CAMA%202017.pdf application/pdf en http://irep.iium.edu.my/61407/7/61407_Spiral%20antenna%20with%20reconfigurable%20HIS%20using%20liquid%20crystals_SCOPUS.pdf Mohamad, Sarah Yasmin and Cahill, Robert (2017) Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application. In: The 2017 IEEE International Conference on Antennas and Applications (IEEE CAMA 2017), 4th-6th December 2017, Ibaraki, Japan. http://www.2017ieeecama.org/final-program/
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English English
topic	TK5101 Telecommunication. Including telegraphy, radio, radar, television
spellingShingle	TK5101 Telecommunication. Including telegraphy, radio, radar, television Mohamad, Sarah Yasmin Cahill, Robert Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application
description	In this paper, the design of an electronically reconfigurable ground plane composed of a high impedance surface (HIS) based on liquid crystals is presented and used as a backing structure for a two-arm Archimedean spiral antenna. The structure is used to provide electronic switching of two different shaped radiation patterns for monopulse radar application; 1) sum-pattern (Σ-pattern), and 2) difference pattern (Δ-pattern). The antenna arrangement is shown to exhibit either the Σ- or the Δ-beam by changing the permittivity (and hence reflection phase) of the HIS reflector when a bias voltage is applied between the periodic array and ground plane. The HIS is demonstrated to resonate at 6 GHz, and numerical results are employed to investigate the performance of the HIS-backed spiral arrangement, i.e. radiation pattern, impedance match, realized gain (Σ-pattern), and null depth (Δ-pattern).
format	Conference or Workshop Item
author	Mohamad, Sarah Yasmin Cahill, Robert
author_facet	Mohamad, Sarah Yasmin Cahill, Robert
author_sort	Mohamad, Sarah Yasmin
title	Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application
title_short	Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application
title_full	Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application
title_fullStr	Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application
title_full_unstemmed	Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application
title_sort	spiral antenna with reconfigurable his using liquid crystals for monopulse radar application
publisher	Institute of Electrical and Electronics Engineers Inc.
publishDate	2017
url	http://irep.iium.edu.my/61407/ http://irep.iium.edu.my/61407/ http://irep.iium.edu.my/61407/1/merged%20-%20CAMA%202017.pdf http://irep.iium.edu.my/61407/7/61407_Spiral%20antenna%20with%20reconfigurable%20HIS%20using%20liquid%20crystals_SCOPUS.pdf
first_indexed	2023-09-18T21:27:06Z
last_indexed	2023-09-18T21:27:06Z
_version_	1777412265166766080

Spiral antenna with reconfigurable HIS using liquid crystals for monopulse radar application

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