Circular polarization wide-angle beam steering at Ka-Band by in-plane translation of a plate lens antenna
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
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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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 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 |
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1799134857611182080 |