Publication: Interfaz de usuario de software de síntesis de multiplexores de microondas para aplicaciones espaciales
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2011-10
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2011-10-28
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Abstract
El presente documento realiza un breve estudio de los multiplexores de microondas así como de sus distintos métodos de síntesis (analítica y optimización). A continuación se ilustrará el proceso para el desarrollo de un nuevo tipo de síntesis que une las ventajas de los dos anteriores. Adicionalmente se desarrollará un conjunto de interfaces que facilitarán la interacción de los usuarios con el programa encargado de la síntesis. Los métodos de síntesis de multiplexores producen como resultado matrices de acoplamientos y topologías. Estas topologías están relacionadas con el diseño físico de la red, por lo que se deberán evitar los cruces entre acoplamientos. Por este motivo será condición necesaria, aunque no suficiente, que las topologías puedan ser representadas mediante grafos planos. Aunque las topologías se corresponden con las matrices de acoplamiento obtenidas mediante síntesis, existe la posibilidad de especificar una topología arbitraria. Adicionalmente será posible transformar las matrices de acoplamientos en otras similares mediante transformaciones de semejanza tales como las rotaciones de Givens o truncar coeficientes de esta matriz para conseguir topologías realizables, si bien esto último tiene el inconveniente de distorsionar la respuesta en frecuencia final. El programa software encargado de la síntesis de multiplexores es bastante complejo por lo que se ha desarrollado un sencillo interfaz que facilita la interacción con los usuarios, permitiéndoles especificar nuevos parámetros, usar unos ya existentes o utilizar unos valores “típicos” correspondientes con los usados en aplicaciones espaciales. Finalmente se analizarán los resultados obtenidos de los distintos métodos de síntesis para varios tipos de multiplexores. Para la realización de todas las simulaciones se ha utilizado el programa software de MATLAB® así como su herramienta GUI para la implementación de las interfaces. --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
This document carries out a brief review of microwave multiplexers and their different methods of synthesis (analytical and optimization). Additionally it will be develop a new type of synthesis which combines the advantages of the two previous methods. In addition a set of interfaces will be developed in order to ease the interaction between users and the program responsible for the synthesis. The result of the synthesis of multiplexers is the coupling matrix and their correspondent topology. These topologies are related to the physical design of the network, therefore cross-couplings should be avoided. For this reason it will necessary but not sufficient condition that these topologies could be represented by planar graphs. Although topologies correspond to coupling matrices obtained by synthesis, it is possible to specify another arbitrary topology. Additionally it will be possible to transform coupling matrices using similarity transformations, such as Givens rotations, or truncating some coefficients in order to obtain feasible topologies, although the latter has the disadvantage of distorting the final frequency response. The software multiplexers’ synthesis program is highly complex therefore to ease the interaction with users, a simple interface has been designed which simplify the entire process. This interface will allow users to specify new parameters, using some existing ones or use a “typical” values corresponding to those used in space applications. To conclude, the results of the entire process will be analyzed for each different synthesis method and for some types of multiplexers. To perform all the simulations we used the MATLAB® software program and its GUI tool for carrying out the set of interfaces.
This document carries out a brief review of microwave multiplexers and their different methods of synthesis (analytical and optimization). Additionally it will be develop a new type of synthesis which combines the advantages of the two previous methods. In addition a set of interfaces will be developed in order to ease the interaction between users and the program responsible for the synthesis. The result of the synthesis of multiplexers is the coupling matrix and their correspondent topology. These topologies are related to the physical design of the network, therefore cross-couplings should be avoided. For this reason it will necessary but not sufficient condition that these topologies could be represented by planar graphs. Although topologies correspond to coupling matrices obtained by synthesis, it is possible to specify another arbitrary topology. Additionally it will be possible to transform coupling matrices using similarity transformations, such as Givens rotations, or truncating some coefficients in order to obtain feasible topologies, although the latter has the disadvantage of distorting the final frequency response. The software multiplexers’ synthesis program is highly complex therefore to ease the interaction with users, a simple interface has been designed which simplify the entire process. This interface will allow users to specify new parameters, using some existing ones or use a “typical” values corresponding to those used in space applications. To conclude, the results of the entire process will be analyzed for each different synthesis method and for some types of multiplexers. To perform all the simulations we used the MATLAB® software program and its GUI tool for carrying out the set of interfaces.
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Filtros de microondas, Filtro paso banda, Multiplexores de microondas, Matriz de acoplamientos, Topología, Rotaciones de Givens, Síntesis analítica, Síntesis por optimización