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An Electrically Small Elliptic PIFA for RFID in Harsh Metallic Environments
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0002-3790-0729
Responsible organisation
2013 (English)In: 2013 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2013, 2013, Art. no. 6685309-, IEEE conference proceedings, 2013, , - p.Conference paper, (Refereed)
Abstract [en]

To remotely identify a metallic object with an RFID tag it is required that the tag’s antenna consists of more than one layer of conducting material, where one layer can comprise the metallic object itself, or alternatively one can use the object itself to make a slot antenna. Tag antennas are also seldom smaller than about ¼ of a wavelength. This paper presents a capacitively fed PIFA for passive UHF RFID wherethe radiating element has received elliptical geometry and is placed inside a circular metallic cup that constitutes the tagantenna’s boundary conditions and is protected by a top layer ofan extremely hard plastic material that also works as a superstrate. The elliptic radiating patch has length of only 0.068 wavelengths and with its cup it has total antenna diameter of0.084 wavelengths and total antenna height 0.016 wavelengths.The final RFID tag can be placed upon a metallic or non-metallicsurface or immersed into the same to create an overall flat surface, as long as it is optimized for the specific situation.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2013. , - p.
Keyword [en]
RFID, Electrically Small Antennas
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-4218DOI: 10.1109/COMCAS.2013.6685309ISI: 000330240700086Scopus ID: 2-s2.0-84893279275Local ID: STCISBN: 978-1-4673-5754-8 (print)OAI: oai:DiVA.org:miun-4218DiVA: diva2:29250
Conference
2013 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems, COMCAS 2013; Tel Aviv; Israel; 21 October 2013 through 23 October 2013; Code 102376
Available from: 2008-09-30 Created: 2009-01-07 Last updated: 2017-05-03Bibliographically approved
In thesis
1. On the Design, Characterization and Optimization of RFID Tag Antennas
Open this publication in new window or tab >>On the Design, Characterization and Optimization of RFID Tag Antennas
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Remotely read electronic identification tags are establishing as the standard method of identifying objects in transport logistcs. They are referred to as RFID tags and with successful research and development they are likely to one day replace all of todays barcodes, found on a wide variety of items and objects. As RFID systems consist of many different parts spanning over just as many academic subjects, this thesis investigates some of the main issues regarding RFID tag antennas. Large focus is put on performance and cost optimization of relatively simple one‐layer antennas, suitable for mass production in commercial printing presses using electrically conductive ink. Examples of specially designed antennas include ones that can operate upon metallic objects and antennas that can be physicall bent. It is also shown how RFID tag antennas that will be widely exposed to the human eye can include a commercial value by letting heir geometric design originate from group insignias and company logos. The thesis also presents a solution of how pairs of ordinary low cost RFID tags can be used as remotely read moisture sensors.

Place, publisher, year, edition, pages
Sundsvall: Mittuniversitetet, 2007. 151 p.
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 28
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
urn:nbn:se:miun:diva-8889 (URN)978-91-85317-58-5 (ISBN)
Public defence
, Sundsvall (English)
Opponent
Supervisors
Available from: 2009-05-06 Created: 2009-05-06 Last updated: 2009-07-16Bibliographically approved

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