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Microfluidic microwave sensor for simultaneous dielectric and magnetic characterization

Microfluidic microwave sensor for simultaneous dielectric and magnetic characterization
Microfluidic microwave sensor for simultaneous dielectric and magnetic characterization
Herein, we demonstrate a method for simultaneously quantifying the electric and magnetic properties of liquid systems confined within a capillary. This is based upon an optimized perturbation of a microwave-frequency coaxial resonator, chosen to maximize the spatial separation of the two fields and to minimize the depolarization of the liquid. A capillary is passed through the center of the resonator so the sample occupies either maximum electric field (zero magnetic field) or maximum magnetic field (zero electric field) depending on whether an odd or even TEM mode is interrogated. This allows electric and magnetic effects to be distinguished at multiple discrete frequencies. We demonstrate this capability through the quantification of varying ionic content of saline solutions, which interact with both the electric andvmagnetic fields via several polarization mechanisms. The distinction of different cations and anions is also demonstrated.
0018-9480
234-243
Rowe, David J.
a0e0fe82-5e29-42b8-b370-5236a722f015
Porch, Adrian
e84c59a9-0e83-4785-9118-200f30b02851
Barrow, David A.
4975dfcd-6b27-4900-a4c9-c348bf24fea9
Allender, Christopher J.
5bd7fef3-7275-4c47-bbca-a7d7a364f679
Rowe, David J.
a0e0fe82-5e29-42b8-b370-5236a722f015
Porch, Adrian
e84c59a9-0e83-4785-9118-200f30b02851
Barrow, David A.
4975dfcd-6b27-4900-a4c9-c348bf24fea9
Allender, Christopher J.
5bd7fef3-7275-4c47-bbca-a7d7a364f679

Rowe, David J., Porch, Adrian, Barrow, David A. and Allender, Christopher J. (2013) Microfluidic microwave sensor for simultaneous dielectric and magnetic characterization. IEEE Transactions on Microwave Theory and Techniques, 61 (1), 234-243. (doi:10.1109/TMTT.2012.2222909).

Record type: Article

Abstract

Herein, we demonstrate a method for simultaneously quantifying the electric and magnetic properties of liquid systems confined within a capillary. This is based upon an optimized perturbation of a microwave-frequency coaxial resonator, chosen to maximize the spatial separation of the two fields and to minimize the depolarization of the liquid. A capillary is passed through the center of the resonator so the sample occupies either maximum electric field (zero magnetic field) or maximum magnetic field (zero electric field) depending on whether an odd or even TEM mode is interrogated. This allows electric and magnetic effects to be distinguished at multiple discrete frequencies. We demonstrate this capability through the quantification of varying ionic content of saline solutions, which interact with both the electric andvmagnetic fields via several polarization mechanisms. The distinction of different cations and anions is also demonstrated.

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More information

e-pub ahead of print date: 5 November 2012
Published date: January 2013
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 356002
URI: http://eprints.soton.ac.uk/id/eprint/356002
ISSN: 0018-9480
PURE UUID: e6a4d267-3128-48d8-b533-627d44a563bf
ORCID for David J. Rowe: ORCID iD orcid.org/0000-0002-1167-150X

Catalogue record

Date deposited: 10 Sep 2013 08:39
Last modified: 08 Jan 2022 03:18

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Contributors

Author: David J. Rowe ORCID iD
Author: Adrian Porch
Author: David A. Barrow
Author: Christopher J. Allender

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