New bifocal design method for dual reflectarray configurations with application to multiple beam antennas in Ka-band
| Autor: | Martínez de Rioja del Nido, Eduardo María, Encinar Garcinuño, José Antonio, Pino García, Antonio, González Valdés, Borja |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Libro de Actas del XXXII Simposium Nacional de la Unión Científica Internacional de Radio, URSI 2017 | XXXII Simposium Nacional de la Unión Científica Internacional de Radio, URSI 2017 | 06/09/2017-08/09/2017 | Cartagena (España) Archivo Digital UPM Universidad Politécnica de Madrid |
| Popis: | This contribution describes a new design technique for multi-beam dual reflectarray antennas with applications in multi-spot satellites. The bifocal design concept has been used to obtain closer beams than in a single focused antenna and, at the same time, to provide an improved performance for the off-axis beams. The required bifocal phase-shift distributions are first obtained with the two reflectarrays in parallel planes, and then adjusted to compensate the tilting of both reflectarrays in the final Cassegrain configuration. The simulated radiation patterns have been first calculated in the principal planes for the beams generated by the feeds at the two foci, and then, the multi-beam performance of the antenna has been evaluated. |
| Databáze: | OpenAIRE |
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