Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna

Detalhes bibliográficos
Autor(a) principal: Lima, E. B.
Data de Publicação: 2015
Outros Autores: Matos, S., Costa, J. R., Fernandes, C. A., Fonseca, N. J. G.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10071/10537
Resumo: A simple mechanical beam steering antenna concept is proposed for ground mobile terminals of Ka-band satellite and high altitude platform (HAP) providing broadband access services. The wide-angle elevation beam steering is achieved by in-plane translation of a thin offset flat lens in front of a stationary primary feed while full azimuth coverage is obtained by simple 360º rotation of the lens. A new strategy is also proposed to reduce the effective F/D of the focusing system and consequently the total antenna height without increasing beam distortion: a second small flat lens is added on top of the primary feed to create a virtual focus located well below the feed phase center. The challenge is to conciliate high gain both with wide beam scanning and reduced antenna height. Design rules are presented for this antenna concept along with a 27.3-dBi gain fabricated example for the up-link Ka-band (29.5–30 GHz), with circular polarization, 0? to 50? 20 elevation scan, better than 2.8-dB scan loss and an effective F/D of only 0.55. Both lenses are 3.35-mm thick, formed by a suitable assembly of phase shifting unit cells with less than 0.4 dB of transmission loss in simulation. The main lens dimensions are 195 mm × 145 mm and its weight is 215 g. Total antenna height, including the feed is 84 mm.
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spelling Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antennaFlat lensFrequency selective surface (FSS)Mechanical scanningPolarization-insensitiveSatellite-on-the-move (SOTM)Wireless communication networkA simple mechanical beam steering antenna concept is proposed for ground mobile terminals of Ka-band satellite and high altitude platform (HAP) providing broadband access services. The wide-angle elevation beam steering is achieved by in-plane translation of a thin offset flat lens in front of a stationary primary feed while full azimuth coverage is obtained by simple 360º rotation of the lens. A new strategy is also proposed to reduce the effective F/D of the focusing system and consequently the total antenna height without increasing beam distortion: a second small flat lens is added on top of the primary feed to create a virtual focus located well below the feed phase center. The challenge is to conciliate high gain both with wide beam scanning and reduced antenna height. Design rules are presented for this antenna concept along with a 27.3-dBi gain fabricated example for the up-link Ka-band (29.5–30 GHz), with circular polarization, 0? to 50? 20 elevation scan, better than 2.8-dB scan loss and an effective F/D of only 0.55. Both lenses are 3.35-mm thick, formed by a suitable assembly of phase shifting unit cells with less than 0.4 dB of transmission loss in simulation. The main lens dimensions are 195 mm × 145 mm and its weight is 215 g. Total antenna height, including the feed is 84 mm.IEEE2016-01-05T15:54:47Z2015-01-01T00:00:00Z20152019-05-09T13:05:01Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10071/10537eng0018-926X10.1109/TAP.2015.2484419Lima, E. B.Matos, S.Costa, J. R.Fernandes, C. A.Fonseca, N. J. G.info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-09T17:57:18Zoai:repositorio.iscte-iul.pt:10071/10537Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:29:32.780874Repositório 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 Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
title Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
spellingShingle Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
Lima, E. B.
Flat lens
Frequency selective surface (FSS)
Mechanical scanning
Polarization-insensitive
Satellite-on-the-move (SOTM)
Wireless communication network
title_short Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
title_full Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
title_fullStr Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
title_full_unstemmed Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
title_sort Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
author Lima, E. B.
author_facet Lima, E. B.
Matos, S.
Costa, J. R.
Fernandes, C. A.
Fonseca, N. J. G.
author_role author
author2 Matos, S.
Costa, J. R.
Fernandes, C. A.
Fonseca, N. J. G.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Lima, E. B.
Matos, S.
Costa, J. R.
Fernandes, C. A.
Fonseca, N. J. G.
dc.subject.por.fl_str_mv Flat lens
Frequency selective surface (FSS)
Mechanical scanning
Polarization-insensitive
Satellite-on-the-move (SOTM)
Wireless communication network
topic Flat lens
Frequency selective surface (FSS)
Mechanical scanning
Polarization-insensitive
Satellite-on-the-move (SOTM)
Wireless communication network
description A simple mechanical beam steering antenna concept is proposed for ground mobile terminals of Ka-band satellite and high altitude platform (HAP) providing broadband access services. The wide-angle elevation beam steering is achieved by in-plane translation of a thin offset flat lens in front of a stationary primary feed while full azimuth coverage is obtained by simple 360º rotation of the lens. A new strategy is also proposed to reduce the effective F/D of the focusing system and consequently the total antenna height without increasing beam distortion: a second small flat lens is added on top of the primary feed to create a virtual focus located well below the feed phase center. The challenge is to conciliate high gain both with wide beam scanning and reduced antenna height. Design rules are presented for this antenna concept along with a 27.3-dBi gain fabricated example for the up-link Ka-band (29.5–30 GHz), with circular polarization, 0? to 50? 20 elevation scan, better than 2.8-dB scan loss and an effective F/D of only 0.55. Both lenses are 3.35-mm thick, formed by a suitable assembly of phase shifting unit cells with less than 0.4 dB of transmission loss in simulation. The main lens dimensions are 195 mm × 145 mm and its weight is 215 g. Total antenna height, including the feed is 84 mm.
publishDate 2015
dc.date.none.fl_str_mv 2015-01-01T00:00:00Z
2015
2016-01-05T15:54:47Z
2019-05-09T13:05:01Z
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/10071/10537
url http://hdl.handle.net/10071/10537
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0018-926X
10.1109/TAP.2015.2484419
dc.rights.driver.fl_str_mv info:eu-repo/semantics/embargoedAccess
eu_rights_str_mv embargoedAccess
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
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
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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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