Publication: Contribuciones al desarollo de convertidores de impedancia negativa en frecuencias de UHF
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2011-11
Defense date
2011-11-25
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Abstract
En este Proyecto Fin de Carrera se ponen de manifiesto las implicaciones que hoy en día puede suponer el uso de los llamados metamateriales, que se presentan como una nueva opción tecnológica que ofrece ventajas y nuevas perspectivas y que, a su vez, tiene limitaciones intrínsecas que se han intentado superar en este trabajo. En los últimos tiempos, las comunicaciones inalámbricas han experimentado un enorme crecimiento, con lo que existe una gran demanda tanto de terminales de usuario como de puntos de acceso a la red con más prestaciones y, si es posible, que funcionen para varios servicios y para todos los estándares/bandas de funcionamiento existentes. Los denominados metamateriales han ayudado a la consecución de los anteriores objetivos, por lo que merecen ser tratados en un trabajo de esta envergadura. Sin embargo, tienen limitaciones inherentes a los mismos como puede ser el pequeño ancho de banda que tienen asociado. Para tratar de sobrepasar estas limitaciones, en el presente trabajo se propone la utilización de formas de Non-Foster, realizables a través de circuitos activos, denominadas, NICs, para el desarrollo, simulación y fabricación de circuitos sin las restricciones de ancho de banda mencionadas anteriormente. ________________________________________________________________________________________________________________________
In this Master Thesis highlights implications of so-called metamaterials, which are presented as a new technological option that offers advantages and new perspectives, which, in turn, has inherent limitations that have been tried to overcome in this work. In recent times, wireless communications have experienced a huge growth, So there is a demanding situation such as user terminals like access points to the network with more benefits and, if possible, working for several services and for existing standards/bands that are currently in the network market. Here it is where the advantages mentioned at the beginning are highlighted, as the so-called metamaterials have helped for the achievement of the previous objectives, so it deserves to be treated in a project of this magnitude. However, they have inherent limitations such as the small bandwidth which have associated. In an attempt to exceed these limitations, in the present assignment the use of Non-Foster forms are proposed, achievable through active circuits, the so-called, NICs, for the development, simulation and manufacture of circuits without the bandwidth restrictions mentioned above.
In this Master Thesis highlights implications of so-called metamaterials, which are presented as a new technological option that offers advantages and new perspectives, which, in turn, has inherent limitations that have been tried to overcome in this work. In recent times, wireless communications have experienced a huge growth, So there is a demanding situation such as user terminals like access points to the network with more benefits and, if possible, working for several services and for existing standards/bands that are currently in the network market. Here it is where the advantages mentioned at the beginning are highlighted, as the so-called metamaterials have helped for the achievement of the previous objectives, so it deserves to be treated in a project of this magnitude. However, they have inherent limitations such as the small bandwidth which have associated. In an attempt to exceed these limitations, in the present assignment the use of Non-Foster forms are proposed, achievable through active circuits, the so-called, NICs, for the development, simulation and manufacture of circuits without the bandwidth restrictions mentioned above.
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Keywords
Metamateriales, Comunicaciones inalámbricas, Radiocomunicación, Convertidores de impedancia