Substrate integrated waveguide-based periodic backward-to-forward scanning leaky-wave antenna with low cross-polarization

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

Substrate integrated waveguide-based periodic backward-to-forward scanning leaky-wave antenna with low cross-polarization

Karmokar, DK

Guo, YJ

Qin, PY

Chen, SL

Bird, TS

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Publication Type:: Journal Article
Citation:: IEEE Transactions on Antennas and Propagation, 2018, 66 (8), pp. 3846 - 3856
Issue Date:: 2018-08-01

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Field	Value	Language
dc.contributor.author	Karmokar, DK https://orcid.org/0000-0002-6614-5064	en_US
dc.contributor.author	Guo, YJ https://orcid.org/0000-0001-6008-9682	en_US
dc.contributor.author	Qin, PY https://orcid.org/0000-0001-8861-4143	en_US
dc.contributor.author	Chen, SL https://orcid.org/0000-0002-4275-0462	en_US
dc.contributor.author	Bird, TS https://orcid.org/0000-0002-2021-5100	en_US
dc.date.issued	2018-08-01	en_US
dc.identifier.citation	IEEE Transactions on Antennas and Propagation, 2018, 66 (8), pp. 3846 - 3856	en_US
dc.identifier.issn	0018-926X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/132274
dc.description.abstract	© 1963-2012 IEEE. For many leaky-wave antennas (LWAs), it is challenging to realize beam scanning through broadside. A problem is the presence of an open stopband (OSB), which restricts radiation in the broadside direction. In this paper, a novel substrate integrated waveguide (SIW)-based LWA is described to overcome the OSB problem and provide beam scanning continuously from the backward to the forward direction from a conventional periodic LWA. It is demonstrated that the n =-1 spatial harmonic can be excited efficiently from an SIW LWA and enables broadside radiation. However, it was found in our initial design that when the beam scans through the broadside, the cross-polarization level increases significantly compared to the beam close to the backfire direction. A technique is developed to reduce the cross-polarization level. As a result, a new antenna configuration is created. The antenna design has been realized and measured to validate the concept. The measured beam scanning range of the prototype is from -74° to +45° (119° of beam scanning) when the frequency sweeps from 7.625 to 11 GHz, and the measured cross-polarization level is 20.8 dB low at the main beam direction for the broadside beam.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP160102219
dc.relation.ispartof	IEEE Transactions on Antennas and Propagation	en_US
dc.relation.isbasedon	10.1109/TAP.2018.2835502	en_US
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Networking & Telecommunications	en_US
dc.title	Substrate integrated waveguide-based periodic backward-to-forward scanning leaky-wave antenna with low cross-polarization	en_US
dc.type	Journal Article
utslib.citation.volume	8	en_US
utslib.citation.volume	66	en_US
utslib.for	0906 Electrical and Electronic Engineering	en_US
utslib.for	1005 Communications Technologies	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
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/Strength - GBDTC - Global Big Data Technologies
utslib.copyright.status	closed_access	*
pubs.issue	8	en_US
pubs.publication-status	Published	en_US
pubs.volume	66	en_US

Abstract:

© 1963-2012 IEEE. For many leaky-wave antennas (LWAs), it is challenging to realize beam scanning through broadside. A problem is the presence of an open stopband (OSB), which restricts radiation in the broadside direction. In this paper, a novel substrate integrated waveguide (SIW)-based LWA is described to overcome the OSB problem and provide beam scanning continuously from the backward to the forward direction from a conventional periodic LWA. It is demonstrated that the n =-1 spatial harmonic can be excited efficiently from an SIW LWA and enables broadside radiation. However, it was found in our initial design that when the beam scans through the broadside, the cross-polarization level increases significantly compared to the beam close to the backfire direction. A technique is developed to reduce the cross-polarization level. As a result, a new antenna configuration is created. The antenna design has been realized and measured to validate the concept. The measured beam scanning range of the prototype is from -74° to +45° (119° of beam scanning) when the frequency sweeps from 7.625 to 11 GHz, and the measured cross-polarization level is 20.8 dB low at the main beam direction for the broadside beam.

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http://hdl.handle.net/10453/132274