Makarovaite, Viktorija, Hillier, A.J.R., Holder, Simon J., Gourlay, Campbell W., Batchelor, John C. (2019) Passive Wireless UHF RFID Antenna Label for Sensing Dielectric Properties of Aqueous and Organic Liquids. IEEE Sensors Journal, 19 (11). pp. 4299-4307. ISSN 1530-437X. E-ISSN 1558-1748. (doi:10.1109/JSEN.2019.2896481) (KAR id:72253)
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Official URL: http://dx.doi.org/10.1109/JSEN.2019.2896481 |
Abstract
The in situ wireless sensing of dielectric properties for organic aqueous solutions with a wide range of relative permittivities is presented. The use of a UHF passive label antenna design attached to either clear borosilicate glass bottle or petri plate is proposed and which allows for the unobtrusive, safe monitoring of the liquid solutions. The meandered dipole antenna (with a parasitic loop matching component) frequency is highly reliant on the chosen container as well as on the liquid present within, and adjusts with shifting dielectric properties. Tested solutions of high relative permittivity (such as water) along with low permittivity, lossy liquids (such as xylene) presented distinctive frequency characteristics with read distances of up to 7 meters for each type of container tested. The sensor was also able to detect ‘unknown’ solutions and determine the dielectric properties by utilizing standard curve analysis with an accuracy of ± 0.834 relative permittivity and ± 0.050 S·m-1 conductivity (compared to a standard dielectric measurement system available on the market). With the accuracy known, tuning the design to fit any necessary frequency is possible as a means to detect specific changes in any one liquid system. This sensor is a possible candidate for discreet real-time monitoring of liquid storage containers and an alternative for low-cost bulk liquid dielectric property identification which could be implemented in areas requiring, constant, or remote monitoring as needed.
Item Type: | Article |
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DOI/Identification number: | 10.1109/JSEN.2019.2896481 |
Projects: | Foresight Fellowship in Manufacturing: Defining and Fabricating New Passive Bio-Sensing Wireless Tag Technologies |
Uncontrolled keywords: | Antenna, battery-free, passive sensing, radio frequency identification (RFID), ultra-high frequency (UHF), wireless sensing |
Subjects: | T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK7800 Electronics > TK7871.6 Antennas and waveguides > TK7871.67.M53 Microwave antennas |
Divisions: | Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts |
Funders: | Engineering and Physical Sciences Research Council (https://ror.org/0439y7842) |
Depositing User: | John Batchelor |
Date Deposited: | 08 Feb 2019 13:29 UTC |
Last Modified: | 02 Feb 2024 09:58 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/72253 (The current URI for this page, for reference purposes) |
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