Frequency responses and synthesis methods for advanced microwave applications
In this thesis, a new approximation procedure based on digital filter design techniques and a direct synthesismethod based on inverse scattering are proposed to provide flexibility to themicrowave filter design process. The combination of bothmethods has been used for the design, fabrication, and me...
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| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2014 |
| País: | España |
| Institución: | Universidad Pública de Navarra |
| Repositorio: | Academica-e. Repositorio Institucional de la Universidad Pública de Navarra |
| OAI Identifier: | oai:academica-e.unavarra.es:2454/29289 |
| Acceso en línea: | https://hdl.handle.net/2454/29289 |
| Access Level: | acceso abierto |
| Palabra clave: | Dispositivos de microondas Radioondas y microondas Diseño de filtros Comunicaciones por satélite |
| Sumario: | In this thesis, a new approximation procedure based on digital filter design techniques and a direct synthesismethod based on inverse scattering are proposed to provide flexibility to themicrowave filter design process. The combination of bothmethods has been used for the design, fabrication, and measurement of a multiband filter. Further modifications have been done in the design to improve its integration using the latest Low Temperature Cofired Ceramics (LTCC)multilayer technology. Different type of rectangular waveguide filters with smooth profiles have been presented that provide wideband rejection, high power handling capability and higher order mode suppression, typical specifications of satellite communication systems. The analysis of the proposed devices makes special emphasis on multi-mode effects, which are analyzed using a home-made mode-matching program that allows to obtain the evolution of themodes and the coupling between theminside the structure. Finally, dispersive delay lines (DDLs), the basic elements of analog signal processing systems, have been considered in detail. After a review of the state of the art, a new method to design chirped delay lines (CDLs) in coupled-lines is proposed and validated by the design, fabrication, and measurement of a device aimed for Ultra Wideband signal processing. In addition, several CDLs in coupled lines are designed to compensate the chromatic dispersion of optical communication systems obtaining very good results for relatively short optical links. |
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