2014
DOI: 10.1109/jsen.2013.2278560
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Development of a Low Cost Printable Chipless RFID Humidity Sensor

Abstract: A novel low-cost chipless RFID tag sensor is presented. The tag sensor provides identification data as well as monitors relative humidity (RH) of tagged objects. The tag sensor is made of passive microwave circuit that uses humidity sensitive polymer material for RH sensing. The aim of this paper is to investigate RF sensing properties of moisture absorbing polymer polyvinyl alcohol (PVA) at microwave frequency. Moreover, frequency shifting technique is used to encode data bits for high data capacity. The over… Show more

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Cited by 149 publications
(71 citation statements)
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“…The actual reading range depends on many factors including the frequency of operation, the power of the reader, and the possible interference from metal objects. At the time of this writing, UHF RFID systems have a reasonable access range while at the same time supporting tags that cost less than $0.10 [30], but the industry is working to reduce it to 5¢ in the next few years [11,96].…”
Section: Applications For Food Packaging and Logisticsmentioning
confidence: 99%
“…The actual reading range depends on many factors including the frequency of operation, the power of the reader, and the possible interference from metal objects. At the time of this writing, UHF RFID systems have a reasonable access range while at the same time supporting tags that cost less than $0.10 [30], but the industry is working to reduce it to 5¢ in the next few years [11,96].…”
Section: Applications For Food Packaging and Logisticsmentioning
confidence: 99%
“…The tags encode the ID data using the delay time of the antenna-mode scattered pulse produced by a length of transmission line, and perform the sensing function using the phase/amplitude change of the scattered pulse modulated by a capacitive/resistive sensor at the end of the transmission line. But the potential application of the above transmission line-based tags is inherently limited by their low coding capacity [14], [21]. In addition, the number of the terminating sensors is also limited, and hence it is difficult to adapt this solution for simultaneously sensing multiple targets.…”
Section: Introductionmentioning
confidence: 99%
“…RFID is a promising technology which has revolutionized automatic identification and wireless sensing of tagged objects. 6 RF waves are exchanged between a tag and reader using wireless transmission. RFID is a fairly handy technology because it facilitates non-line of sight communication which improves the tag's efficiency and provides longer reading range.…”
Section: Introductionmentioning
confidence: 99%