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Printed Humidity Se...
Printed Humidity Sensor with Memory Functionality for Passive RFID tags
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- Gao, Jinlan (författare)
- Mittuniversitetet,Avdelningen för elektronikkonstruktion
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- Sidén, Johan (författare)
- Mittuniversitetet,Avdelningen för elektronikkonstruktion,Sensible Solutions, Sundsvall SE-851 70, Sweden
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- Nilsson, Hans-Erik (författare)
- Mittuniversitetet,Avdelningen för elektronikkonstruktion
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- Gulliksson, Mikael (författare)
- Mittuniversitetet,Avdelningen för medie- och kommunikationsvetenskap,Sensible Solutions, Sundsvall SE-851 70, Sweden
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(creator_code:org_t)
- 2013
- 2013
- Engelska.
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Ingår i: IEEE Sensors Journal. - 1530-437X .- 1558-1748. ; 13:5, s. 1824-1834
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- This paper presents a printed UHF RFID sensor solution that indicates whether a passive RFID tag has been exposed to a certain degree of humidity. The printed sensor operates as a Write Once Read Many (WORM) resistive memory as it permanently changes its resistance from about 2 kÙ to less than 50 Ù after exposure to humidity or water. The change of the sensor resistance is used to modulate the properties of a UHF RFID tag antenna by changing antenna input impedance and also introducing or removing ohmic losses in the antenna structure. The final result is reflected in the change of the minimum transmit power required to power-up the RFID tag. Both the sensor and the tag antenna are printed horizontally on a paper substrate. Different geometric combinations of sensor and antenna structures are investigated. Typical applications include non-invasive methods for detecting wetness or humidity levels in hidden locations such as within construction structures. The sensor setup can also serve to provide information as to whether a package sent over a supply chain has exceeded a certain level of humidity during its route.
Ämnesord
- 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)
Nyckelord
- Antennas
- Humidity Sensors
- Printed Electronics
- RFID
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- art (ämneskategori)
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