Análisis y optimización eficiente de agrupaciones de ranuras en guía
[EN] The present thesis develops an efficient and optimized design for large waveguide slot-arrays. Specifically, RLSA antennas on radial guides and classic arrays on monomode rectangular waveguides are considered. Besides, the standard performance of this kind of antennas is improved by adding para...
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| Tipo de recurso: | tesis doctoral |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | español |
| OAI Identifier: | oai:riunet.upv.es:10251/59416 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/59416 |
| Access Level: | acceso abierto |
| Palabra clave: | Antenas Agrupaciones de ranuras Agrupaciones en guía Análisis de agrupaciones Optimización de agrupaciones Método de los momentos Medios multicapa TEORIA DE LA SEÑAL Y COMUNICACIONES |
| Sumario: | [EN] The present thesis develops an efficient and optimized design for large waveguide slot-arrays. Specifically, RLSA antennas on radial guides and classic arrays on monomode rectangular waveguides are considered. Besides, the standard performance of this kind of antennas is improved by adding parasitic dipoles above slots. This novelty allows on the one hand to alleviate the known drawbacks of RLSA antennas with linear polarization (LPRLSA). On the other hand, the new elements enable radiation of circular polarization by rectangular waveguide slot arrays, conceptually limited to linear polarization. The attainment of the aimed objectives is accomplished by following a three-stage sequential methodology. Firstly, an efficient and rigorous analysis method for each structure under study is implemented. This aspect turns out to be essential due to the huge size of involved antennas. Then, efficient design and optimization algorithms are conceived and developed, which must be suitable for arrays formed by a high number of elements. Finally, the achieved results are validated by means of the fabrication and measurement of several prototypes. New LP-RLSA topologies proposed in this thesis provide a desired advance in their limited performance, without sacrificing their original low-cost concept. This progress becomes a reality thanks to the development of dedicated optimization algorithms. The achieved experimental results confirm such advance, thus postulating as a promising approach to the performance exhibited by CP-RLSA antennas. Concerning rectangular waveguide slot arrays, an exhaustive and versatile optimization process is applied. This thesis also comprises a deep study about the attainable bandwidth of this kind of antennas, including the well-known detuning technique. As a result, a frequency optimization method is proposed, which aims to maximize the specifications' compliance within a targeted frequency band. Every proposed algorithm is extended to account for circular polarization arrays, given by the inclusion of parasitic dipoles. This modification enables this antennas to cover a wider scope of applications. Fabrication and measurement of several prototypes, envisaged for an actual deployment of different systems, confirm the conclusions of theoretical analysis. |
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