Synthesis of planar arrays with elements in concentric rings

Detalhes bibliográficos
Autor(a) principal: Azevedo, Joaquim A. R.
Data de Publicação: 2010
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.13/2566
Resumo: The circular symmetry of concentric ring arrays becomes an advantage for situations where the radiation patterns are symmetric in the azimuthal direction. For planar arrays with elements in an equispaced grid, the fast Fourier transform can be applied in the calculations involved between the array factor and the source distribution. However, for circular arrays the elements are in a non-equispaced grid, making the application of fast computation algorithms difficult. Therefore, two techniques are proposed to synthesize circular arrays. The first one provides the control of the pattern by sampling the array factor. In this case, the fast Fourier transform can be applied. The windows technique is also utilized to control the sidelobe levels and the ripple structure of the shaped beam. The second technique considers the symmetric nature of concentric circular arrays and the control of the array factor is performed imposing some specific points of the pattern.
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spelling Synthesis of planar arrays with elements in concentric ringsPlanar arrayChebyshev approximationFourier transformsAperturesAntenna radiation patterns.Faculdade de Ciências Exatas e da EngenhariaThe circular symmetry of concentric ring arrays becomes an advantage for situations where the radiation patterns are symmetric in the azimuthal direction. For planar arrays with elements in an equispaced grid, the fast Fourier transform can be applied in the calculations involved between the array factor and the source distribution. However, for circular arrays the elements are in a non-equispaced grid, making the application of fast computation algorithms difficult. Therefore, two techniques are proposed to synthesize circular arrays. The first one provides the control of the pattern by sampling the array factor. In this case, the fast Fourier transform can be applied. The windows technique is also utilized to control the sidelobe levels and the ripple structure of the shaped beam. The second technique considers the symmetric nature of concentric circular arrays and the control of the array factor is performed imposing some specific points of the pattern.Institute of Electrical and Electronics EngineersDigitUMaAzevedo, Joaquim A. R.2019-10-21T09:22:07Z2010-01-01T00:00:00Z2010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10400.13/2566engAzevedo, J. A. (2010). Synthesis of planar arrays with elements in concentric rings. IEEE Transactions on Antennas and Propagation, 59(3), 839-845.metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T12:55:23Zoai:digituma.uma.pt:10400.13/2566Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:05:21.145059Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Synthesis of planar arrays with elements in concentric rings
title Synthesis of planar arrays with elements in concentric rings
spellingShingle Synthesis of planar arrays with elements in concentric rings
Azevedo, Joaquim A. R.
Planar array
Chebyshev approximation
Fourier transforms
Apertures
Antenna radiation patterns
.
Faculdade de Ciências Exatas e da Engenharia
title_short Synthesis of planar arrays with elements in concentric rings
title_full Synthesis of planar arrays with elements in concentric rings
title_fullStr Synthesis of planar arrays with elements in concentric rings
title_full_unstemmed Synthesis of planar arrays with elements in concentric rings
title_sort Synthesis of planar arrays with elements in concentric rings
author Azevedo, Joaquim A. R.
author_facet Azevedo, Joaquim A. R.
author_role author
dc.contributor.none.fl_str_mv DigitUMa
dc.contributor.author.fl_str_mv Azevedo, Joaquim A. R.
dc.subject.por.fl_str_mv Planar array
Chebyshev approximation
Fourier transforms
Apertures
Antenna radiation patterns
.
Faculdade de Ciências Exatas e da Engenharia
topic Planar array
Chebyshev approximation
Fourier transforms
Apertures
Antenna radiation patterns
.
Faculdade de Ciências Exatas e da Engenharia
description The circular symmetry of concentric ring arrays becomes an advantage for situations where the radiation patterns are symmetric in the azimuthal direction. For planar arrays with elements in an equispaced grid, the fast Fourier transform can be applied in the calculations involved between the array factor and the source distribution. However, for circular arrays the elements are in a non-equispaced grid, making the application of fast computation algorithms difficult. Therefore, two techniques are proposed to synthesize circular arrays. The first one provides the control of the pattern by sampling the array factor. In this case, the fast Fourier transform can be applied. The windows technique is also utilized to control the sidelobe levels and the ripple structure of the shaped beam. The second technique considers the symmetric nature of concentric circular arrays and the control of the array factor is performed imposing some specific points of the pattern.
publishDate 2010
dc.date.none.fl_str_mv 2010-01-01T00:00:00Z
2010-01-01T00:00:00Z
2019-10-21T09:22:07Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.13/2566
url http://hdl.handle.net/10400.13/2566
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Azevedo, J. A. (2010). Synthesis of planar arrays with elements in concentric rings. IEEE Transactions on Antennas and Propagation, 59(3), 839-845.
dc.rights.driver.fl_str_mv metadata only access
info:eu-repo/semantics/openAccess
rights_invalid_str_mv metadata only access
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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