Electromagnetic-wave beam-scanning antenna using near-field rotatable graded-dielectric plates

Afzal, MU; Lalbakhsh, A; Esselle, KP

Electromagnetic-wave beam-scanning antenna using near-field rotatable graded-dielectric plates

Afzal, MU Lalbakhsh, A Esselle, KP

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Publisher:: AMER INST PHYSICS
Publication Type:: Journal Article
Citation:: Journal of Applied Physics, 2018, 124, (23)
Issue Date:: 2018-12-21

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Field	Value	Language
dc.contributor.author	Afzal, MU
dc.contributor.author	Lalbakhsh, A
dc.contributor.author	Esselle, KP
dc.date.accessioned	2021-04-13T02:41:57Z
dc.date.available	2021-04-13T02:41:57Z
dc.date.issued	2018-12-21
dc.identifier.citation	Journal of Applied Physics, 2018, 124, (23)
dc.identifier.issn	0021-8979
dc.identifier.issn	1089-7550
dc.identifier.uri	http://hdl.handle.net/10453/148053
dc.description.abstract	The paper proposes an electromagnetic-wave beam-scanning antenna system using a simple rotation of a pair of near-field graded-dielectric plates (GDPs). The antenna system requires an electromagnetic (EM) illuminator, with nearly symmetric aperture field distribution, as the base antenna and two types of GDPs: one radially graded dielectric (RGD) and two linearly graded dielectric (LGD) plates. The RGD first focuses the beam of the base antenna in the broadside direction, and the LGD then tilts the focused beam at an offset angle. For some types of base antennas, having fairly uniform aperture phase distributions, an RGD may not be required and only a pair of LGDs are sufficient. Irrespective of the antenna configuration, using a simple rotation of the two LGDs, the beam can be scanned to any position within a large conical region. The antenna system presented as a proof of concept has a resonant-cavity antenna as the base antenna and three graded-dielectric plates. The aperture length of the antenna system is 6 λ 0 and its height is 2.2 λ 0. The results predicted by numerical simulations indicate that the antenna system has highest peak directivity of 21 dBi. The beam can be scanned to any direction within a cone having an apex angle of 20 °.
dc.language	English
dc.publisher	AMER INST PHYSICS
dc.relation.ispartof	Journal of Applied Physics
dc.relation.isbasedon	10.1063/1.5049204
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	01 Mathematical Sciences, 02 Physical Sciences, 09 Engineering
dc.subject.classification	Applied Physics
dc.title	Electromagnetic-wave beam-scanning antenna using near-field rotatable graded-dielectric plates
dc.type	Journal Article
utslib.citation.volume	124
utslib.for	01 Mathematical Sciences
utslib.for	02 Physical Sciences
utslib.for	09 Engineering
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
utslib.copyright.status	closed_access	*
dc.date.updated	2021-04-13T02:41:54Z
pubs.issue	23
pubs.publication-status	Published
pubs.volume	124
utslib.citation.issue	23

Abstract:

The paper proposes an electromagnetic-wave beam-scanning antenna system using a simple rotation of a pair of near-field graded-dielectric plates (GDPs). The antenna system requires an electromagnetic (EM) illuminator, with nearly symmetric aperture field distribution, as the base antenna and two types of GDPs: one radially graded dielectric (RGD) and two linearly graded dielectric (LGD) plates. The RGD first focuses the beam of the base antenna in the broadside direction, and the LGD then tilts the focused beam at an offset angle. For some types of base antennas, having fairly uniform aperture phase distributions, an RGD may not be required and only a pair of LGDs are sufficient. Irrespective of the antenna configuration, using a simple rotation of the two LGDs, the beam can be scanned to any position within a large conical region. The antenna system presented as a proof of concept has a resonant-cavity antenna as the base antenna and three graded-dielectric plates. The aperture length of the antenna system is 6 λ 0 and its height is 2.2 λ 0. The results predicted by numerical simulations indicate that the antenna system has highest peak directivity of 21 dBi. The beam can be scanned to any direction within a cone having an apex angle of 20 °.

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http://hdl.handle.net/10453/148053