Utilize este identificador para referenciar este registo: http://hdl.handle.net/10071/33134
Autoria: Vaquero, Á. F.
Teixeira, J.
Matos, S. A.
Arrebola, M.
Costa, J. R.
Felício, J. M.
Fernandes, C. A.
Fonseca, N. J. G.
Data: 2023
Título próprio: Design of low-profile transmitarray antennas with wide mechanical beam steering at millimeter waves
Título da revista: IEEE Transactions on Antennas and Propagation
Volume: 71
Número: 4
Paginação: 3713 - 3718
Referência bibliográfica: Vaquero, Á. F., Teixeira, J., Matos, S. A., Arrebola, M., Costa, J. R., Felício, J. M., Fernandes, C. A., & Fonseca, N. J. G. (2023). Design of low-profile transmitarray antennas with wide mechanical beam steering at millimeter waves. IEEE Transactions on Antennas and Propagation, 71(4), 3713-3718. https://doi.org/10.1109/TAP.2023.3243796
ISSN: 0018-926X
DOI (Digital Object Identifier): 10.1109/TAP.2023.3243796
Palavras-chave: 3-D printing
5G mobile communications
Dielectric lens
Ka-band
Low focal distance mechanical beam steering
Transmitarray (TA)
Resumo: Mechanical beam steering using a single Transmitarray (TA) can be a cost-effective solution for a high-gain antenna with wide-angle scanning. Elevation scanning can be achieved by a linear displacement of the feed in the focal plane parallel to the aperture of diameter D. When designing compact terminals with a short focal length F and with high gain, the aberrations caused by this mechanical movement become the main limiting factor for the maximum scanning range. This work presents a novel design method for devising the TA phase correction with an even distribution of these aberrations among all beam directions. A significant improvement in the scanning performance is achieved when compared with the conventional single-focus phase correction approach. To validate the proposed approach, we consider a TA design at Ka-band (30 GHz) F/D≅0.34. A multifocal TA design was manufactured using 3D printed unit-cells. To highlight the proposed concept, the antenna configuration is stripped to the bare minimum: a perforated dielectric slab with in-plane mechanical movements in front of an open-ended standard waveguide used as feed. This antenna scans up to 50°, with a gain of 25 dBi at 30 GHz, 2.5 dB of scan loss, SLL <-10 dB and 1dB-bandwidth of 6.7%.
Arbitragem científica: yes
Acesso: Acesso Aberto
Aparece nas coleções:IT-RI - Artigos em revistas científicas internacionais com arbitragem científica

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