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TM(02) Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals

The detection of multiple fluids using a single chip has been attracting attention recently. A TM(02) quarter-mode substrate-integrated waveguide resonator designed at 5.81 GHz on RT/duroid 6010LM with a return loss of 13 dB and an unloaded quality factor of Q ≈ 13 generates two distinct strong elec...

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Detalles Bibliográficos
Autores principales: Salim, Ahmed, Lim, Sungjoon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6021807/
https://www.ncbi.nlm.nih.gov/pubmed/29912164
http://dx.doi.org/10.3390/s18061964
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author Salim, Ahmed
Lim, Sungjoon
author_facet Salim, Ahmed
Lim, Sungjoon
author_sort Salim, Ahmed
collection PubMed
description The detection of multiple fluids using a single chip has been attracting attention recently. A TM(02) quarter-mode substrate-integrated waveguide resonator designed at 5.81 GHz on RT/duroid 6010LM with a return loss of 13 dB and an unloaded quality factor of Q ≈ 13 generates two distinct strong electric fields that can be manipulated to simultaneously detect two chemicals. Two asymmetric channels engraved in a polydimethylsiloxane sheet are loaded with analyte to produce a unique resonance frequency in each case, regardless of the dielectric constants of the liquids. Keeping in view the nature of lossy liquids such as ethanol, the initial structure and channels are optimized to ensure a reasonable return loss even in the case of loading lossy liquids. After loading the empty channels, Q is evaluated as 43. Ethanol (E) and deionized water (DI) are simultaneously loaded to demonstrate the detection of all possible combinations: [Air, Air], [E, DI], [DI, E], [E, E], and [DI, DI]. The proposed structure is miniaturized while exhibiting a performance comparable to that of existing multichannel microwave chemical sensors.
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spelling pubmed-60218072018-07-02 TM(02) Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals Salim, Ahmed Lim, Sungjoon Sensors (Basel) Article The detection of multiple fluids using a single chip has been attracting attention recently. A TM(02) quarter-mode substrate-integrated waveguide resonator designed at 5.81 GHz on RT/duroid 6010LM with a return loss of 13 dB and an unloaded quality factor of Q ≈ 13 generates two distinct strong electric fields that can be manipulated to simultaneously detect two chemicals. Two asymmetric channels engraved in a polydimethylsiloxane sheet are loaded with analyte to produce a unique resonance frequency in each case, regardless of the dielectric constants of the liquids. Keeping in view the nature of lossy liquids such as ethanol, the initial structure and channels are optimized to ensure a reasonable return loss even in the case of loading lossy liquids. After loading the empty channels, Q is evaluated as 43. Ethanol (E) and deionized water (DI) are simultaneously loaded to demonstrate the detection of all possible combinations: [Air, Air], [E, DI], [DI, E], [E, E], and [DI, DI]. The proposed structure is miniaturized while exhibiting a performance comparable to that of existing multichannel microwave chemical sensors. MDPI 2018-06-18 /pmc/articles/PMC6021807/ /pubmed/29912164 http://dx.doi.org/10.3390/s18061964 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Salim, Ahmed
Lim, Sungjoon
TM(02) Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals
title TM(02) Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals
title_full TM(02) Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals
title_fullStr TM(02) Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals
title_full_unstemmed TM(02) Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals
title_short TM(02) Quarter-Mode Substrate-Integrated Waveguide Resonator for Dual Detection of Chemicals
title_sort tm(02) quarter-mode substrate-integrated waveguide resonator for dual detection of chemicals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6021807/
https://www.ncbi.nlm.nih.gov/pubmed/29912164
http://dx.doi.org/10.3390/s18061964
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