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Descripción
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| The motivation of this thesis has been to provide new advances on the design of multi-frequency and multi-beam reflectarray antennas with application to multiple spot beam satellites in Ka-band. In this respect, the thesis can be divided into two main parts. The first part contains the description of a novel reflectarray cell to operate in dual-linear polarization (dual-LP) at two separate frequencies (enabling independent phasing in each polarization and frequency), as well as the design of dual-band reflectarrays to provide independent beams in each polarization at both frequency bands. The second part of the thesis comprises the development of a bifocal design technique for dual reflectarray and dual transmitarray configurations, and its application to the design of multi-beam antennas in Ka-band. The aim of the bifocal technique is twofold, to improve the multi-beam performance of the antenna and to provide a certain degree of reduction on the angular separation between adjacent beams for a multi-spot coverage from a satellite. | |
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Internacional
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Si |
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ISBN
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Tipo de Tesis
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Doctoral |
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Calificación
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Sobresaliente cum laude |
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Fecha
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04/04/2018 |