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Dual mode microwave microfluidic sensor for temperature variant liquid characterization

Abduljabar, Ali A., Clark, Nicholas, Lees, Jonathan and Porch, Adrian 2017. Dual mode microwave microfluidic sensor for temperature variant liquid characterization. IEEE Transactions on Microwave Theory and Techniques 65 (7) , 2572 - 2582. 10.1109/TMTT.2016.2647249

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A dual mode, microstrip, microfluidic sensor was designed, built, and tested, which has the ability to measure a liquid's permittivity at 2.5 GHz and, simultaneously, compensate for temperature variations. The active liquid volume is small, only around 4.5 μL. The sensor comprises two quarter ring microstrip resonators, which are excited in parallel. The first of these is a microfluidic sensor whose resonant frequency and quality factor depend on the dielectric properties of a liquid sample. The second is used as a reference to adjust for changes in the ambient temperature. To validate this method, two liquids (water and chloroform) have been tested over a temperature range from 23 °C to 35 °C, with excellent compensation results.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
ISSN: 0018-9480
Funders: Engineering and Physical Research Council
Date of First Compliant Deposit: 23 March 2017
Date of Acceptance: 10 December 2016
Last Modified: 21 Apr 2020 09:00

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