Continuous Backward-to-Forward Scanning 1-D Slot-Array Leaky-Wave Antenna with Improved Gain

Karmokar, DK; Chen, SL; Thalakotuna, D; Qin, PY; Bird, TS; Guo, YJ

Continuous Backward-to-Forward Scanning 1-D Slot-Array Leaky-Wave Antenna with Improved Gain

Karmokar, DK Chen, SL Thalakotuna, D

Qin, PY Bird, TS Guo, YJ

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Antennas and Wireless Propagation Letters, 2020, 19, (1), pp. 89-93
Issue Date:: 2020-01-01

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Field	Value	Language
dc.contributor.author	Karmokar, DK
dc.contributor.author	Chen, SL
dc.contributor.author	Thalakotuna, D https://orcid.org/0000-0002-4504-6139
dc.contributor.author	Qin, PY
dc.contributor.author	Bird, TS
dc.contributor.author	Guo, YJ
dc.date.accessioned	2020-11-14T19:08:50Z
dc.date.available	2020-11-14T19:08:50Z
dc.date.issued	2020-01-01
dc.identifier.citation	IEEE Antennas and Wireless Propagation Letters, 2020, 19, (1), pp. 89-93
dc.identifier.issn	1536-1225
dc.identifier.issn	1548-5757
dc.identifier.uri	http://hdl.handle.net/10453/144003
dc.description.abstract	© 2002-2011 IEEE. A leaky-wave antenna (LWA) on a substrate integrated waveguide (SIW) with continuous beam-scanning capabilities and improved gain is presented. A one-dimensional (1-D) longitudinal slot-array SIW antenna is used as the main radiating element. It was found that due to the capacitive effect of the slot, an open-stopband (OSB) restrains broadside radiation. Although a reduction of the bandgap can be achieved when the slots are closer to the center, the radiation performance of the LWA degrades around the broadside as the beam scans from backward to forward. Initially, the capacitive effect was mitigated, and hence, the OSB was suppressed by introducing a group of three shorting vias at the opposite side of each longitudinal slot. However, the gain of the antenna drops significantly around its upper scan angles in the forward directions. To improve the radiation performance further, the center via of each of the via group is replaced by a transverse slot. The new unit cell is then used to design a modified 1-D slot-array LWA, and the antenna is analyzed, prototyped, and measured to verify the concept.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartof	IEEE Antennas and Wireless Propagation Letters
dc.relation.isbasedon	10.1109/LAWP.2019.2953927
dc.rights	© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.title	Continuous Backward-to-Forward Scanning 1-D Slot-Array Leaky-Wave Antenna with Improved Gain
dc.type	Journal Article
utslib.citation.volume	19
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	1005 Communications Technologies
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	1005 Communications Technologies
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Strength - GBDTC - Global Big Data Technologies
utslib.copyright.status	open_access	*
utslib.copyright.embargo	2022-01-01T00:00:00+1000Z
dc.date.updated	2020-11-14T19:08:45Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	19
utslib.citation.issue	1

Abstract:

© 2002-2011 IEEE. A leaky-wave antenna (LWA) on a substrate integrated waveguide (SIW) with continuous beam-scanning capabilities and improved gain is presented. A one-dimensional (1-D) longitudinal slot-array SIW antenna is used as the main radiating element. It was found that due to the capacitive effect of the slot, an open-stopband (OSB) restrains broadside radiation. Although a reduction of the bandgap can be achieved when the slots are closer to the center, the radiation performance of the LWA degrades around the broadside as the beam scans from backward to forward. Initially, the capacitive effect was mitigated, and hence, the OSB was suppressed by introducing a group of three shorting vias at the opposite side of each longitudinal slot. However, the gain of the antenna drops significantly around its upper scan angles in the forward directions. To improve the radiation performance further, the center via of each of the via group is replaced by a transverse slot. The new unit cell is then used to design a modified 1-D slot-array LWA, and the antenna is analyzed, prototyped, and measured to verify the concept.

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http://hdl.handle.net/10453/144003