Coaxial microwave resonant sensor design for monitoring ionic concentration in aqueous solutions Neihart, Nathan Roy, Subhanwit Neihart, Nathan Bowler, Nicola Bowler, Nicola
dc.contributor.department Electrical and Computer Engineering
dc.contributor.department Materials Science and Engineering
dc.contributor.department Center for Nondestructive Evaluation (CNDE) 2018-07-25T20:13:06.000 2020-06-30T06:06:30Z 2020-06-30T06:06:30Z Mon Jan 01 00:00:00 UTC 2018 2018-07-20 2018-07-12
dc.description.abstract <p>Nitrate efflux from agricultural lands mixes with surface streams and adversely affects both human health as well as aquatic life. Currently, there is a lack of low-cost, effective, real-time systems for monitoring ion concentration. In this work, a microwave resonant sensor is designed using an open-ended coaxial transmission line, which can be evanescently perturbed by a liquid sample, and a suitable coupling structure which allows transmission measurements. The sensor is developed to have high sensitivity at agriculturally relevant concentrations, low manufacturing costs, and small dimensions to be potentially field deployable. Finite Element Analysis simulations are carried out using ANSYS HFSS, employing complex permittivity data of aqueous solution samples with varying concentrations of nitrate, sulfate, and chloride ions. Appropriate functions are determined that model the correlations between resonant frequency and ion concentration, and discussion on the feasibility of the sensor for field deployment is presented.</p>
dc.description.comments <p>This is a manuscript of a proceeding published as Roy, Subhanwit, Nathan M. Neihart, and Nicola Bowler. "Coaxial microwave resonant sensor design for monitoring ionic concentration in aqueous solutions." In <em>2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)</em>. IEEE, 2018. doi: <a href="" target="_blank">10.1109/I2MTC.2018.8409878</a>. Posted with permission.</p>
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dc.identifier archive/
dc.identifier.articleid 1046
dc.identifier.contextkey 12519699
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath mse_conf/46
dc.language.iso en
dc.source.bitstream archive/|||Sat Jan 15 00:22:44 UTC 2022
dc.source.bitstream archive/|||Sat Jan 15 00:22:45 UTC 2022
dc.source.uri 10.1109/I2MTC.2018.8409878
dc.subject.disciplines Electrical and Computer Engineering
dc.subject.disciplines Environmental Monitoring
dc.subject.disciplines Materials Science and Engineering
dc.subject.keywords dielectric metrology
dc.subject.keywords low cost
dc.subject.keywords microwave resonant sensor
dc.subject.keywords nitrate monitoring
dc.subject.keywords nondestructive
dc.subject.keywords noninvasive
dc.title Coaxial microwave resonant sensor design for monitoring ionic concentration in aqueous solutions
dc.type article
dc.type.genre conference
dspace.entity.type Publication
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