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Flexible Circuits and Materials for Large-Area UHF RFID Reader Antenna Systems

Li, Xiaotian (author)
Mittuniversitetet,Avdelningen för elektronikkonstruktion
Sidén, Johan, 1975- (author)
Mittuniversitetet,Avdelningen för elektronikkonstruktion
Andersson, Henrik, 1975- (author)
Mittuniversitetet,Avdelningen för elektronikkonstruktion
 (creator_code:org_t)
2018-01-31
2018
English.
In: IOP Flexible and Printed Electronics. - : IOP Publishing. - 2058-8585. ; 3:1
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

UHF RFID
large-area reader antenna system
flexible circuits and materials

Publication and Content Type

ref (subject category)
art (subject category)

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Li, Xiaotian
Sidén, Johan, 19 ...
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Mid Sweden University

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