Publication: Diseño de antena integrada en banda de milimétricas
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2012-09-07
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2012-09-07
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Abstract
En este proyecto se ha desarrollado un receptor heterodino que incluye transiciones de microondas de milimétricas, filtros y un circuito mezclador. En este trabajo discutimos el diseño de un sistema de un pixel como estudio previo a la implementación de un array de píxeles. Se ha diseñado un mezclador subarmónico utilizando líneas de microstrip. Se incluyen diversos elementos tales como circuitos de adaptación de impedancias, así como filtros, para mejorar la adaptación y aislamiento entre los puertos del mezclador. Las dimensiones de todos los elementos fueron optimizados para conseguir una mejor eficiencia de conversión. Se propuso utilizar una guía onda rectangular para excitar el puerto LO del mezclador subarm ónico Se han estudiado varias topologías de transiciones para conseguir una transición de guía onda rectangular a CPS, eligiendo finalmente la opción de guía onda rectangular - CPS - microstrip. Se utilizó una antena Yagi Uda para implementar la transici ón guí a onda rectangular a CPS. Se lanzaron simulaciones paramétricas para optimizar las propiedades de la transmisi ón. Se construyó una transición de microstrip a CPS bajo la topología back to back para medir el rendimiento real. La transici ón guí a onda rectangular a microstrip fue diseñado con éxito obteniendo una pérdida de inserción de 2 dB. _____________________________________________________________________________________________________________________
In this project a heterodyne receiver has been developed. The needed elements are millimeter wave microwave transition circuits, filters and a mixer circuit. Here, the design of a one pixel system is discussed as previous work for a pixel array. A subharmonic mixer has been designed in microstrip technology. Several elements such as matching networks and filtering stages were included to improve matching and isolation between mixer ports. The physical dimension of all the elements were optimized to achieve a better mixer e fficiency. Rectangular waveguide excitation for the LO input of the subharmonic mixer was proposed. Several types of transition have been analyzed to obtain a rectangular waveguide to microstrip transition. The option rectangular waveguide - CPS - microstrip was chosen. A Yagi Uda antenna has been used to achieve rectangular waveguide to CPS transition. Parametric simulations have been launched to optimize the transition performance. A back to back microstrip to CPS transition was constructed to verify its actual behavior. The rectangular waveguide to microstrip transition was successfully obtained with an insertion loss of 2 dB.
In this project a heterodyne receiver has been developed. The needed elements are millimeter wave microwave transition circuits, filters and a mixer circuit. Here, the design of a one pixel system is discussed as previous work for a pixel array. A subharmonic mixer has been designed in microstrip technology. Several elements such as matching networks and filtering stages were included to improve matching and isolation between mixer ports. The physical dimension of all the elements were optimized to achieve a better mixer e fficiency. Rectangular waveguide excitation for the LO input of the subharmonic mixer was proposed. Several types of transition have been analyzed to obtain a rectangular waveguide to microstrip transition. The option rectangular waveguide - CPS - microstrip was chosen. A Yagi Uda antenna has been used to achieve rectangular waveguide to CPS transition. Parametric simulations have been launched to optimize the transition performance. A back to back microstrip to CPS transition was constructed to verify its actual behavior. The rectangular waveguide to microstrip transition was successfully obtained with an insertion loss of 2 dB.
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Antenas, Circuitos integradosCircuitos integrados, Tecnología de microondas