Utilize este identificador para referenciar este registo:
http://hdl.handle.net/10071/16555
Autoria: | Matos, S. A. Costa, J. R. Lima, E. B. Naseri, P. Fernandes, C. A. Fonseca, N. J. G. |
Data: | 2018 |
Título próprio: | Wide-angle mechanical scanning Transmit-arrays for satellite Ka-band user terminals |
Palavras-chave: | Transmit-arrays High-gain antennas Wide-beam steering Mechanical scanning Dual band Circular polarization Satellite-on-the-move (SOTM) Ka-band |
Resumo: | The antenna design for broadband satellite communications is particularly challenging, new cost-effective solutions are still needed. An overview of recent contributions from the authors on planar transmit-arrays (TAs) for satellite Kaband user terminals is presented. We tackle several design problems: how to improve the scanning coverage using low cost mechanical beam steering, how to choose the type of unit cells that compose the TA, how to devise a single aperture with high gain that operates simultaneous at two widely separate frequency bands. Different prototypes are used to conduct these studies. All these TAs provide wide beam zenith scanning, [-50º,50º] with less that 3dB of scan loss, good circular polarization performance and low beam distortions. The prototypes have the same aperture size, 195 × 145 mm2, that provide gains up to 29 dBi for 30 GHz. |
Arbitragem científica: | yes |
Acesso: | Acesso Aberto |
Aparece nas coleções: | IT-CRI - Comunicações a conferências internacionais |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Wide-angle mechanical scanning Transmit-arrays for satellite Ka-band user terminals.pdf | Pós-print | 1,32 MB | Adobe PDF | Ver/Abrir |
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