Wideband Fixed-Beam Single-Piece Leaky Wave Antenna with Controlled Dispersion Slope

Chen, SL; Song, LZ; Karmokar, DK; Jones, B; Guo, YJ

Wideband Fixed-Beam Single-Piece Leaky Wave Antenna with Controlled Dispersion Slope

Chen, SL Song, LZ Karmokar, DK Jones, B Guo, YJ

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Publisher:: IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Publication Type:: Journal Article
Citation:: IEEE Transactions on Antennas and Propagation, 2023, 71, (11), pp. 8429-8440
Issue Date:: 2023-11-01

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Field	Value	Language
dc.contributor.author	Chen, SL
dc.contributor.author	Song, LZ
dc.contributor.author	Karmokar, DK
dc.contributor.author	Jones, B
dc.contributor.author	Guo, YJ
dc.date.accessioned	2024-02-20T23:17:01Z
dc.date.available	2024-02-20T23:17:01Z
dc.date.issued	2023-11-01
dc.identifier.citation	IEEE Transactions on Antennas and Propagation, 2023, 71, (11), pp. 8429-8440
dc.identifier.issn	0018-926X
dc.identifier.issn	1558-2221
dc.identifier.uri	http://hdl.handle.net/10453/175770
dc.description.abstract	Leaky wave antennas (LWAs) have been widely investigated for wireless systems because of their simple feed, low profile, and easy integration. They typically have a dispersive traveling wave leading to beam squinting behavior, which can significantly decrease the useful operating bandwidth in point-to-point communications. An innovative method that avoids beam squint with frequency over a wide band is developed in this work using a negative dispersion slope. By integrating a baffle of square bracket-shaped metal pieces into a transverse-slot LWA, the main beam angle is almost fixed at an angle, θ = 37° pm 2° , across a wide frequency band from 9.5 to 12.2 GHz. The wide bandwidth is a consequence of the negative dispersion slope produced by the interaction between the baffle and the slotted waveguide. In the θ = 37° direction, the gain variation is less than 3 dB across this band. Equivalent circuit analysis and full-wave modeling are presented to demonstrate the negative-slope dispersion diagram. The obtained 3-dB gain curve exhibits a filter characteristic. In addition, the bandwidth can be chosen by a suitable selection of parameters. It is the first time that these desirable features have been reported for wideband fixed-beam LWAs. The final antenna was fabricated with a low-cost additive manufacturing (3-D printing) technology. The measured results agree well with the simulated ones and verify the effectiveness of the antennas developed in this way.
dc.language	English
dc.publisher	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
dc.relation.ispartof	IEEE Transactions on Antennas and Propagation
dc.relation.isbasedon	10.1109/TAP.2023.3310005
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.subject.classification	4006 Communications engineering
dc.subject.classification	4008 Electrical engineering
dc.subject.classification	4009 Electronics, sensors and digital hardware
dc.title	Wideband Fixed-Beam Single-Piece Leaky Wave Antenna with Controlled Dispersion Slope
dc.type	Journal Article
utslib.citation.volume	71
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	1005 Communications Technologies
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/Strength - GBDTC - Global Big Data Technologies
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2024-02-20T23:16:59Z
pubs.issue	11
pubs.publication-status	Published
pubs.volume	71
utslib.citation.issue	11

Abstract:

Leaky wave antennas (LWAs) have been widely investigated for wireless systems because of their simple feed, low profile, and easy integration. They typically have a dispersive traveling wave leading to beam squinting behavior, which can significantly decrease the useful operating bandwidth in point-to-point communications. An innovative method that avoids beam squint with frequency over a wide band is developed in this work using a negative dispersion slope. By integrating a baffle of square bracket-shaped metal pieces into a transverse-slot LWA, the main beam angle is almost fixed at an angle, θ = 37° pm 2° , across a wide frequency band from 9.5 to 12.2 GHz. The wide bandwidth is a consequence of the negative dispersion slope produced by the interaction between the baffle and the slotted waveguide. In the θ = 37° direction, the gain variation is less than 3 dB across this band. Equivalent circuit analysis and full-wave modeling are presented to demonstrate the negative-slope dispersion diagram. The obtained 3-dB gain curve exhibits a filter characteristic. In addition, the bandwidth can be chosen by a suitable selection of parameters. It is the first time that these desirable features have been reported for wideband fixed-beam LWAs. The final antenna was fabricated with a low-cost additive manufacturing (3-D printing) technology. The measured results agree well with the simulated ones and verify the effectiveness of the antennas developed in this way.

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http://hdl.handle.net/10453/175770