Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab

The behavior of leaky and surface modes in uniaxially anisotropic grounded slabs is investigated. First, a transverse magnetic and transverse electric modal parametric analysis of the structure is performed, based on dispersion relations, comparing the non-dispersive and Drude/Lorentz dispersive ani...

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Autores: Shahvarpour, Attieh, Melcón Álvarez, Alejandro, Caloz, Christophe
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2011
País:España
Institución:Universidad Politécnica de Cartagena(UPCT)
Repositorio:Repositorio Digital UPCT
OAI Identifier:oai:repositorio.upct.es:10317/1927
Acceso en línea:http://hdl.handle.net/10317/1927
Access Level:acceso abierto
Palabra clave:Metamaterials
Leaky-wave antenna
Integral equations
Anisotropic slabs
Teoría de la Señal y las Comunicaciones
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spelling Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded SlabShahvarpour, AttiehMelcón Álvarez, AlejandroCaloz, ChristopheMetamaterialsLeaky-wave antennaIntegral equationsAnisotropic slabsTeoría de la Señal y las ComunicacionesThe behavior of leaky and surface modes in uniaxially anisotropic grounded slabs is investigated. First, a transverse magnetic and transverse electric modal parametric analysis of the structure is performed, based on dispersion relations, comparing the non-dispersive and Drude/Lorentz dispersive anisotropic slabs with an isotropic non-dispersive slab. This analysis reveals that in the case of the isotropic slab, the leaky wave pointing angle is restricted to the end-fire region. In contrast, it is shown, for the first time, that the proposed anisotropic dispersive grounded slab structure provides efficient (in particular highly directive) leaky wave radiation with a high design flexibility. Toward its lower frequencies, the dominant leaky mode provides full-space conical-beam scanning. At higher frequencies, it provides fixed-beam radiation (at a designable angle) with very low beam squint. A vertical dipole source is placed inside the slab to excite the relevant leaky wave mode. The radiation characteristics obtained for this structure confirms the novel low-beam squint and high-directivity operation of the dominant leaky mode. Further validation is included using the commercial software tool CST. The structure could be used to conceive antennas either for conical beam scanning (lower-frequency range) or for point-to-point communication and radar systems (higher-frequency range).Ministerio de Educación y Ciencia, Ref. TEC2010-21520-C04-04American Geophysical Union (AGU)Grupo Electromagnetismo Aplicado a las TelecomunicacionesMinisterio de Educación y Ciencia201120112011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://hdl.handle.net/10317/1927reponame:Repositorio Digital UPCTinstname:Universidad Politécnica de Cartagena(UPCT)InglésTEC2010-21520-C04-04American Geophysical Union (AGU)info:eu-repo/semantics/openAccessoai:repositorio.upct.es:10317/19272026-05-15T06:39:02Z
dc.title.none.fl_str_mv Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
title Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
spellingShingle Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
Shahvarpour, Attieh
Metamaterials
Leaky-wave antenna
Integral equations
Anisotropic slabs
Teoría de la Señal y las Comunicaciones
title_short Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
title_full Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
title_fullStr Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
title_full_unstemmed Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
title_sort Broadband and Low Beam Squint Leaky-Wave Radiation from a Uniaxially Anisotropic Grounded Slab
dc.creator.none.fl_str_mv Shahvarpour, Attieh
Melcón Álvarez, Alejandro
Caloz, Christophe
author Shahvarpour, Attieh
author_facet Shahvarpour, Attieh
Melcón Álvarez, Alejandro
Caloz, Christophe
author_role author
author2 Melcón Álvarez, Alejandro
Caloz, Christophe
author2_role author
author
dc.contributor.none.fl_str_mv Grupo Electromagnetismo Aplicado a las Telecomunicaciones
Ministerio de Educación y Ciencia
dc.subject.none.fl_str_mv Metamaterials
Leaky-wave antenna
Integral equations
Anisotropic slabs
Teoría de la Señal y las Comunicaciones
topic Metamaterials
Leaky-wave antenna
Integral equations
Anisotropic slabs
Teoría de la Señal y las Comunicaciones
description The behavior of leaky and surface modes in uniaxially anisotropic grounded slabs is investigated. First, a transverse magnetic and transverse electric modal parametric analysis of the structure is performed, based on dispersion relations, comparing the non-dispersive and Drude/Lorentz dispersive anisotropic slabs with an isotropic non-dispersive slab. This analysis reveals that in the case of the isotropic slab, the leaky wave pointing angle is restricted to the end-fire region. In contrast, it is shown, for the first time, that the proposed anisotropic dispersive grounded slab structure provides efficient (in particular highly directive) leaky wave radiation with a high design flexibility. Toward its lower frequencies, the dominant leaky mode provides full-space conical-beam scanning. At higher frequencies, it provides fixed-beam radiation (at a designable angle) with very low beam squint. A vertical dipole source is placed inside the slab to excite the relevant leaky wave mode. The radiation characteristics obtained for this structure confirms the novel low-beam squint and high-directivity operation of the dominant leaky mode. Further validation is included using the commercial software tool CST. The structure could be used to conceive antennas either for conical beam scanning (lower-frequency range) or for point-to-point communication and radar systems (higher-frequency range).
publishDate 2011
dc.date.none.fl_str_mv 2011
2011
2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10317/1927
url http://hdl.handle.net/10317/1927
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv TEC2010-21520-C04-04
dc.rights.none.fl_str_mv American Geophysical Union (AGU)
info:eu-repo/semantics/openAccess
rights_invalid_str_mv American Geophysical Union (AGU)
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union (AGU)
publisher.none.fl_str_mv American Geophysical Union (AGU)
dc.source.none.fl_str_mv reponame:Repositorio Digital UPCT
instname:Universidad Politécnica de Cartagena(UPCT)
instname_str Universidad Politécnica de Cartagena(UPCT)
reponame_str Repositorio Digital UPCT
collection Repositorio Digital UPCT
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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