Development and characterization of subsystems for a 2.45 GHz RFID research environment

Nowadays, the Radio Frequency IDentification (RFID) technology is a very fast emerging and developing technology with a wide range of applications in different fields. Due to the technological progress, the number of applications has increased enormously, leading to the creation of many different standards in several distinct frequency bands for supporting these applications. The majority of this standards are not compatible with each other and moreover, there is not an unique UHF band standard worldwide. For this reason, a possible solution to achieve a compatible RFID system around the world is by means of the 2.45 GHz microwave ISM band. More and more this 2.45 GHz RFID band is considered and currently there are systems working at this frequency. This thesis describes the design and the implementation of a frontend for a 2.45 GHz RFID testbed. Inside the document, relevant RFID basics and the assumed regulations are discussed. The system concept designed is explained and selected elements are tested and optimized. The development of the transmitter and receiver board is described and finally for both boards the characterization and the measurements results are shown

Development and characterization of subsystems for a 2.45 GHz RFID research environment

Nowadays, the Radio Frequency IDentification (RFID) technology is a very fast emerging and developing technology with a wide range of applications in different fields. Due to the technological progress, the number of applications has increased enormously, leading to the creation of many different standards in several distinct frequency bands for supporting these applications. The majority of this standards are not compatible with each other and moreover, there is not an unique UHF band standard worldwide. For this reason, a possible solution to achieve a compatible RFID system around the world is by means of the 2.45 GHz microwave ISM band. More and more this 2.45 GHz RFID band is considered and currently there are systems working at this frequency. This thesis describes the design and the implementation of a frontend for a 2.45 GHz RFID testbed. Inside the document, relevant RFID basics and the assumed regulations are discussed. The system concept designed is explained and selected elements are tested and optimized. The development of the transmitter and receiver board is described and finally for both boards the characterization and the measurements results are shown

Diseño y construcción de bus de datos y sensores para las prácticas de NACC

Este trabajo final de carrera se puede dividir en dos partes. En la primera parte se diseña y construye un nodo (o interfície) de comunicaciones que es capaz de recibir datos mediante diferentes protocolos como SPI, I2C, RS232 y transmitirlo todo a un bus principal (CAN Bus). De esta forma, se podrán comunicar diferentes dispositivos sin preocuparnos del protocolo nativo que utilicen. El control de este nodo de comunicaciones se realiza con un microcontrolador PIC18F4580, ya que éste se adapta perfectamente a nuestros objetivos. Para implementar la parte software hemos utilizado el compilador CCS y las librerías que se han desarrollado para CAN. Una vez terminada la primera parte, relacionada más con el área de las comunicaciones, en trabajo se centra en una segunda parte que está más relacionada con la instrumentación para navegación. En esta parte se desarrolla una placa de adquisición de datos que incluye unos sensores que proporcionan información de inclinación, aceleración y velocidad angular. La idea general es conectar la placa de sensores con otros dispositivos (elaborados, por ejemplo, por compañeros en otros TFC) utilizando los nodos de comunicaciones en CANBus, y así poder utilizar múltiples dispositivos en las prácticas de la asignatura 'Navegación Aérea, Cartografía y Cosmografía' (NACC)