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Flexible Circuits and Materials for Large-Area UHF RFID Reader Antenna Systems
Mid Sweden University, Faculty of Science, Technology and Media, Department of Electronics Design.ORCID iD: 0000-0002-1125-1150
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: 0000-0003-2965-0288
2018 (English)In: IOP Flexible and Printed Electronics, ISSN 2058-8585, Vol. 3, no 1, article id 015005Article in journal (Refereed) Published
Abstract [en]

RF electronics commonly incorporate PCB-materials with low loss tangents, which limits its use for large-area applications due to its high cost. This work verifies one alternative solution how non-conventional flexible circuit materials can be used to manufacture large functional surfaces for RF-based applications. Laminated Al foils are used for conducting layers and a flexible foam material is used for substrate. An RFID reader system has been developed to demonstrate the functionality, comprising of eight microstrip antenna elements arranged in a SP4T switching structure covering an area of 1.2 m × 0.6 m. Each antenna element is individually addressable with aid of distributed digital and analogue multiplexer circuitry and it is shown how these components can be soldered directly onto the Al conductors. The constructed system shows good RF performance, both with regards to the materials and to the interconnections with the distributed multiplexer circuitry. It can perform far-field RFID tag reading above its surface without dead zones and the system characterization implies that the concept can be further expanded to cover geometrical areas up to 1000 square meters.

Place, publisher, year, edition, pages
2018. Vol. 3, no 1, article id 015005
Keywords [en]
UHF RFID, large-area reader antenna system, flexible circuits and materials
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-32307DOI: 10.1088/2058-8585/aaa1f3ISI: 000424097500002Scopus ID: 2-s2.0-85045646881OAI: oai:DiVA.org:miun-32307DiVA, id: diva2:1163382
Note

Accepted Manuscript online 15 December 2017

Available from: 2017-12-06 Created: 2017-12-06 Last updated: 2018-05-16Bibliographically approved

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Li, XiaotianSidén, JohanAndersson, Henrik

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