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RFID: Investigation of selectivity, comparison between active and passive transponders
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology.
2012 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This is a report  where an approach to use a patch antenna as the transmit device when sending radio waves in a RFID system has been investigated. The project is successful in the sense that the antenna is working as imagined, the antenna parameters may however not be satisfactory. The antenna read range may be a little to insufficient when the RFID tags are worn by humans which is one of the underlying requirement for the system this antenna was design for. Tags which are rotated  from a vertical alignment also reduce the effectiveness of the antenna even more to a point which is not acceptable. Suggestions for how to further improve the antenna are given and addresses the issues mentioned above. The report  first contains a brief introduction to antennas in general and also information about patch antennas specifically as that was the antenna chosen to be constructed  and tested for this system as it theoretically seemed very fitting. A working antenna was constructed  and tested in a real environment together with simulations of the antenna to further examine it. The finished antenna is evaluated with possible advantages and drawbacks being discussed together with mentioning how then antenna could be improved for better  performance.

Place, publisher, year, edition, pages
UPTEC IT, ISSN 1401-5749 ; 12 009
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-177258OAI: diva2:539668
Educational program
Master of Science Programme in Information Technology Engineering
Available from: 2012-07-04 Created: 2012-07-04 Last updated: 2012-07-04Bibliographically approved

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