Flexible Thin Film Multi-antenna Integrated Backscatter Device

Boxuan Xie, Juho Kerminen, Jari Lietzen, Lauri Mela, Kalle Ruttik, Alp Karakoc, Riku Jäntti

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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In the ambient backscatter communication (AmBC)
system, a backscatter device (BD) transmits its messages to
receivers by modulating and reflecting incident radio frequency
(RF) signals from ambient RF emitters. Most existing studies
investigate single-antenna BDs and fabricate them using the
conventional printed circuit board (PCB) method. In this paper,
we propose flexible inkjet-printed integrated backscatter devices
(IBDs) for indoor backscatter radios.We investigate and fabricate
both single-antenna and multi-antenna IBDs using the inkjet
printing technique. Since the commonly used substrate polyethylene
terephthalate (PET) for inkjet-printed electronics has highly
lossy properties, the printed feeding lines in the RF become
inefficient. We propose to overcome this problem by positioning
the backscatter switch next to each antenna and controlling them
simultaneously with the baseband backscatter signal. Attenuation
of the baseband control signal in printed lines is low leading
to increase in overall efficiency of the proposed system. We
validate the prototypes with received backscatter signal strength
measurements in an anechoic chamber. The result shows that
the printed four-antenna IBD can benefit approximately 9 dB
diversity gain compared with the single-antenna version.
Original languageEnglish
Title of host publicationProceedings of the IEEE Wireless Communications and Networking Conference
Number of pages6
Publication statusAccepted/In press - 2024
MoE publication typeA4 Conference publication
EventIEEE Wireless Communications and Networking Conference - Dubai, United Arab Emirates
Duration: 21 Apr 202424 Apr 2024


ConferenceIEEE Wireless Communications and Networking Conference
Country/TerritoryUnited Arab Emirates


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