Publication: Estudio de una superficie soft para reducir el acoplo mutuo entre parches
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2015-06
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2015-06-15
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Abstract
En este proyecto se tratan algunas problemáticas de la tecnología impresa. Más concretamente se centra en el análisis y control de las ondas de superficie que viajan por el sustrato en el que están contenidas. Estas ondas, no deseadas, se logran disminuir mediante un tipo de estructuras denominadas soft.
En el trabajo se diseña una superficie soft formada por tiras metálicas paralelas cortocircuitadas por vías metalizadas al plano de masa, para posteriormente analizarla de forma sistemática mediante los parámetros de Scattering. Este análisis se realiza con el programa CST Microwave Studio mostrando el comportamiento de dicha superficie en función de la variación de algunos de sus parámetros.
Por otro lado, se diseña un array de dos parches cuadrados y posteriormente se analiza con la misma herramienta para ver cuál es el acoplo mutuo existente entre ambos. A continuación se realiza el mismo análisis pero colocando entre las dos antenas una superficie periódica de dos y tres tiras. De este modo se puede observar cómo afecta el uso de una superficie soft al acoplo mutuo existente entre dos antenas impresas. Finalmente se obtiene una reducción del acoplo mutuo existente entre dos antenas de parche cuadradas entre 5 dB y 15 dB dependiendo del número de periodos utilizados.
This document analyzes the problems of antenna printed technology. The main problem is related with superficial waves that exist in the substrate. The use of special structures called ‘soft’ reduces these undesired waves. This work designs a soft surface made of metallic and parallel strips, short-circuited to ground by metalized via holes. This surface is analyzed by using scattering parameters with the software CST Microwave Studio, showing the performance of the structure when some parameters are modified. In addition, this work shows an array design with two squared patches. This array is analyzed with the same software to see which is the mutual coupling produced. This analysis is repeated using two and three strips between the patches to see how a soft surface affects the mutual coupling and if this reduction is proportional to the number of periods between antennas. To sum up, the study shows that the use of a soft surface reduce the mutual coupling between two squared patch antennas from 5 dB to 15 dB depending on the number of periods used.
This document analyzes the problems of antenna printed technology. The main problem is related with superficial waves that exist in the substrate. The use of special structures called ‘soft’ reduces these undesired waves. This work designs a soft surface made of metallic and parallel strips, short-circuited to ground by metalized via holes. This surface is analyzed by using scattering parameters with the software CST Microwave Studio, showing the performance of the structure when some parameters are modified. In addition, this work shows an array design with two squared patches. This array is analyzed with the same software to see which is the mutual coupling produced. This analysis is repeated using two and three strips between the patches to see how a soft surface affects the mutual coupling and if this reduction is proportional to the number of periods between antennas. To sum up, the study shows that the use of a soft surface reduce the mutual coupling between two squared patch antennas from 5 dB to 15 dB depending on the number of periods used.
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Microelectrónica, Ondas electromagnéticas, Soft, Antenas, Superficie soft