Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches

Detalhes bibliográficos
Autor(a) principal: Lima, E. B.
Data de Publicação: 2015
Outros Autores: Matos, S., Costa, J. R., Fernandes, C. A.
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10071/23237
Resumo: Most of the transmitarray phase shifting cell designs assume a periodic repetition of the same cell to account for the coupling effects of the neighboring cells. However the behavior in terms of magnitude and phase of the transmission coefficient calculated in this way may change when the neighboring cells have different phase, as normally happens in transmitarrays due to phase discretization. This paper characterizes this effect using a family of sub-wavelength patch cells covering the entire 360º phase shift interval, all with transmission coefficient better than -0.2 dB in the periodic structure. A stepped-phase structure is analysed considering different phase step values from 5º up to 90º. It is shown that the magnitude of the cells transmission factor changes considerably at the transition between different elements, with the unit cells with higher phase shift showing increased transmission while the lower phase shift cells in the transition tend to block the transmission more.
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spelling Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patchesTransmitarrayFlat lensUnit cellFrequency selective surface (FSS)Transmission coeficientElements transitionMost of the transmitarray phase shifting cell designs assume a periodic repetition of the same cell to account for the coupling effects of the neighboring cells. However the behavior in terms of magnitude and phase of the transmission coefficient calculated in this way may change when the neighboring cells have different phase, as normally happens in transmitarrays due to phase discretization. This paper characterizes this effect using a family of sub-wavelength patch cells covering the entire 360º phase shift interval, all with transmission coefficient better than -0.2 dB in the periodic structure. A stepped-phase structure is analysed considering different phase step values from 5º up to 90º. It is shown that the magnitude of the cells transmission factor changes considerably at the transition between different elements, with the unit cells with higher phase shift showing increased transmission while the lower phase shift cells in the transition tend to block the transmission more.IEEE2021-09-28T12:02:25Z2015-01-01T00:00:00Z20152021-09-28T12:55:27Zconference objectinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://hdl.handle.net/10071/23237eng9781479970513Lima, E. B.Matos, S.Costa, J. R.Fernandes, C. A.info: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:RCAAP2024-07-07T02:29:41Zoai:repositorio.iscte-iul.pt:10071/23237Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-07-07T02:29:41Repositório 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 Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches
title Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches
spellingShingle Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches
Lima, E. B.
Transmitarray
Flat lens
Unit cell
Frequency selective surface (FSS)
Transmission coeficient
Elements transition
title_short Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches
title_full Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches
title_fullStr Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches
title_full_unstemmed Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches
title_sort Evaluation of the phase discretization effect in transmitarrays formed by sub-wavelength patches
author Lima, E. B.
author_facet Lima, E. B.
Matos, S.
Costa, J. R.
Fernandes, C. A.
author_role author
author2 Matos, S.
Costa, J. R.
Fernandes, C. A.
author2_role author
author
author
dc.contributor.author.fl_str_mv Lima, E. B.
Matos, S.
Costa, J. R.
Fernandes, C. A.
dc.subject.por.fl_str_mv Transmitarray
Flat lens
Unit cell
Frequency selective surface (FSS)
Transmission coeficient
Elements transition
topic Transmitarray
Flat lens
Unit cell
Frequency selective surface (FSS)
Transmission coeficient
Elements transition
description Most of the transmitarray phase shifting cell designs assume a periodic repetition of the same cell to account for the coupling effects of the neighboring cells. However the behavior in terms of magnitude and phase of the transmission coefficient calculated in this way may change when the neighboring cells have different phase, as normally happens in transmitarrays due to phase discretization. This paper characterizes this effect using a family of sub-wavelength patch cells covering the entire 360º phase shift interval, all with transmission coefficient better than -0.2 dB in the periodic structure. A stepped-phase structure is analysed considering different phase step values from 5º up to 90º. It is shown that the magnitude of the cells transmission factor changes considerably at the transition between different elements, with the unit cells with higher phase shift showing increased transmission while the lower phase shift cells in the transition tend to block the transmission more.
publishDate 2015
dc.date.none.fl_str_mv 2015-01-01T00:00:00Z
2015
2021-09-28T12:02:25Z
2021-09-28T12:55:27Z
dc.type.driver.fl_str_mv conference object
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10071/23237
url http://hdl.handle.net/10071/23237
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 9781479970513
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv IEEE
publisher.none.fl_str_mv IEEE
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
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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