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Signal strength readout and miniaturised antenna for metal-mountable UHF RFID threshold temperature sensor tag

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Signal strength readout and miniaturised antenna for metal-mountable UHF RFID threshold temperature sensor tag. / Björninen, Toni; Yang, Fan.

In: Electronics Letters, Vol. 51, No. 22, 22.10.2015, p. 1734-1736.

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@article{46f84f2458a54060aa0bd236cd22b125,
title = "Signal strength readout and miniaturised antenna for metal-mountable UHF RFID threshold temperature sensor tag",
abstract = "A new method for the wireless monitoring of a battery-free threshold temperature sensor based on a passive ultra-high-frequency radiofrequency identification (RFID) tag integrated with a bimetal thermostat switch is presented. The strategic placement of the switch brings about a strong modification in the tag antenna impedance as the temperature crosses over a threshold value. Optimisation of the narrow-band tag antenna to operate at the edges of the 902-928 MHz frequencyhopping spread spectrum RFID in the different switch states provides separate sub-bands for the readout above and below a threshold temperature. The results show that this enables an unambiguous sensor readout by monitoring the backscattered signal strength.",
author = "Toni Bj{\"o}rninen and Fan Yang",
year = "2015",
month = "10",
day = "22",
doi = "10.1049/el.2015.2661",
language = "English",
volume = "51",
pages = "1734--1736",
journal = "Electronics Letters",
issn = "0013-5194",
publisher = "Institution of Engineering and Technology",
number = "22",

}

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TY - JOUR

T1 - Signal strength readout and miniaturised antenna for metal-mountable UHF RFID threshold temperature sensor tag

AU - Björninen, Toni

AU - Yang, Fan

PY - 2015/10/22

Y1 - 2015/10/22

N2 - A new method for the wireless monitoring of a battery-free threshold temperature sensor based on a passive ultra-high-frequency radiofrequency identification (RFID) tag integrated with a bimetal thermostat switch is presented. The strategic placement of the switch brings about a strong modification in the tag antenna impedance as the temperature crosses over a threshold value. Optimisation of the narrow-band tag antenna to operate at the edges of the 902-928 MHz frequencyhopping spread spectrum RFID in the different switch states provides separate sub-bands for the readout above and below a threshold temperature. The results show that this enables an unambiguous sensor readout by monitoring the backscattered signal strength.

AB - A new method for the wireless monitoring of a battery-free threshold temperature sensor based on a passive ultra-high-frequency radiofrequency identification (RFID) tag integrated with a bimetal thermostat switch is presented. The strategic placement of the switch brings about a strong modification in the tag antenna impedance as the temperature crosses over a threshold value. Optimisation of the narrow-band tag antenna to operate at the edges of the 902-928 MHz frequencyhopping spread spectrum RFID in the different switch states provides separate sub-bands for the readout above and below a threshold temperature. The results show that this enables an unambiguous sensor readout by monitoring the backscattered signal strength.

UR - http://www.scopus.com/inward/record.url?scp=84946080424&partnerID=8YFLogxK

U2 - 10.1049/el.2015.2661

DO - 10.1049/el.2015.2661

M3 - Article

VL - 51

SP - 1734

EP - 1736

JO - Electronics Letters

JF - Electronics Letters

SN - 0013-5194

IS - 22

ER -