Localization of Signal Pattern Based UHF RFID Sensor Tags

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This letter presents a prototype system that combines sensing and localization capabilities based on the radio frequency identification (RFID) technology in the ultrahighfrequency (UHF) band. The system detects empty water tanks by recognizing a predefined transponder (tag) signal pattern at the reader. The shape of this pattern is determined by a custom-built sensor tag antenna that interacts in a unique way with an offthe-shelf microchip and the water filling level. The localization of this sensor tag is achieved by a 2-D direction of arrival (DoA) estimation, exploiting a 2 × 2 antenna array. The measurement results compare well with electromagnetic simulations. It is shown that the detection of the sensing state is sufficiently robust to cope with different tank positions, even in multipath environments. Furthermore, the system is robust in its localization performance, although the sensing state influences the wireless channel.
Original languageEnglish
Pages (from-to)753-756
JournalIEEE Microwave and Wireless Components Letters
Volume29
Issue number11
DOIs
Publication statusPublished - 2019

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Radio frequency identification (RFID)
radio frequencies
Water tanks
Transponders
Direction of arrival
sensors
Sensors
Antenna arrays
Antennas
transponders
antenna arrays
readers
shelves
water
arrivals
Water
antennas
prototypes
electromagnetism
simulation

Fields of Expertise

  • Information, Communication & Computing

Cite this

Localization of Signal Pattern Based UHF RFID Sensor Tags. / Görtschacher, Lukas Johann; Grosinger, Jasmin.

In: IEEE Microwave and Wireless Components Letters, Vol. 29, No. 11, 2019, p. 753-756.

Research output: Contribution to journalArticleResearchpeer-review

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