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Towards Long-Range Backscatter Communication with Tunnel Diode Reflection Amplifiers
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Electronics.
2018 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Backscatter communication enables wireless communication at a power consumption orders of magnitude lower than conventional wireless communication. Instead of generating new RF-signals backscatter communication leverages ambient signals, such as WiFi-, Bluetooth- or TV-signals, and reflects them by changing the impedance of the antenna. Backscatter communication is known as a short-range communication technique achieving ranges in the order of meters. To improve the communication range, we explore the use of a tunnel diode as an amplifier of the backscattered RF-signal. We developed the amplifier on a PCB-board together with a matching network tuned to give maximum gain at 868 MHz. Our work demonstrates that the 1N3712 tunnel diode can achieve gains up to 35 dB compared to a tag without amplification while having a peak power consumption of 48 μW. With this amplifier the communication distance can be increased by up to two orders of magnitude.

Place, publisher, year, edition, pages
2018. , p. 46
Series
UPTEC F, ISSN 1401-5757 ; 18039
Keywords [en]
Amplified backscatter tag, Reflection amplifier, Battery-free, Long-range communication, Tunnel diode, Ultra-low power consumption, RFID, Frequency shift
National Category
Communication Systems Computer Engineering
Identifiers
URN: urn:nbn:se:uu:diva-354901OAI: oai:DiVA.org:uu-354901DiVA, id: diva2:1223106
Subject / course
Information Systems
Educational program
Master Programme in Engineering Physics
Supervisors
Examiners
Available from: 2018-06-25 Created: 2018-06-25 Last updated: 2018-06-25Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
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  • de-DE
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Output format
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