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Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications

In this paper, a microwave cavity resonator is presented for chemical sensing applications. The proposed resonator is comprised of a three dimensional (3D) split-ring resonator (SRR) residing in an external cavity and capacitively coupled by a pair of coaxial probes. 3D-printing technology with poly...

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Detalles Bibliográficos
Autores principales: Salim, Ahmed, Ghosh, Saptarshi, Lim, Sungjoon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6165322/
https://www.ncbi.nlm.nih.gov/pubmed/30213040
http://dx.doi.org/10.3390/s18093049
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author Salim, Ahmed
Ghosh, Saptarshi
Lim, Sungjoon
author_facet Salim, Ahmed
Ghosh, Saptarshi
Lim, Sungjoon
author_sort Salim, Ahmed
collection PubMed
description In this paper, a microwave cavity resonator is presented for chemical sensing applications. The proposed resonator is comprised of a three dimensional (3D) split-ring resonator (SRR) residing in an external cavity and capacitively coupled by a pair of coaxial probes. 3D-printing technology with polylactic acid (PLA) filament is used to build the 3D SRR and cavity. Then, the surfaces of the SRR and the inside walls of cavity are silver-coated. The novelty of our proposed structure is its light weight and inexpensive design, owing to the utilization of low density and low-cost PLA. A Teflon tube is passed through the split-gap of the SRR so that it is parallel to the applied electric field. With an empty tube, the resonance frequency of the structure is measured at 2.56 GHz with an insertion loss of 13.6 dB and quality factor (Q) of 75. A frequency shift of 205 MHz with respect to the empty channel was measured when deionized water (DIW) was injected into the tube. Using volume occupied by the structure, the weight of the proposed microwave resonator is estimated as 22.8 g which is significantly lighter than any metallic structure of comparable size.
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spelling pubmed-61653222018-10-10 Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications Salim, Ahmed Ghosh, Saptarshi Lim, Sungjoon Sensors (Basel) Article In this paper, a microwave cavity resonator is presented for chemical sensing applications. The proposed resonator is comprised of a three dimensional (3D) split-ring resonator (SRR) residing in an external cavity and capacitively coupled by a pair of coaxial probes. 3D-printing technology with polylactic acid (PLA) filament is used to build the 3D SRR and cavity. Then, the surfaces of the SRR and the inside walls of cavity are silver-coated. The novelty of our proposed structure is its light weight and inexpensive design, owing to the utilization of low density and low-cost PLA. A Teflon tube is passed through the split-gap of the SRR so that it is parallel to the applied electric field. With an empty tube, the resonance frequency of the structure is measured at 2.56 GHz with an insertion loss of 13.6 dB and quality factor (Q) of 75. A frequency shift of 205 MHz with respect to the empty channel was measured when deionized water (DIW) was injected into the tube. Using volume occupied by the structure, the weight of the proposed microwave resonator is estimated as 22.8 g which is significantly lighter than any metallic structure of comparable size. MDPI 2018-09-12 /pmc/articles/PMC6165322/ /pubmed/30213040 http://dx.doi.org/10.3390/s18093049 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
Ghosh, Saptarshi
Lim, Sungjoon
Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications
title Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications
title_full Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications
title_fullStr Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications
title_full_unstemmed Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications
title_short Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications
title_sort low-cost and lightweight 3d-printed split-ring resonator for chemical sensing applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6165322/
https://www.ncbi.nlm.nih.gov/pubmed/30213040
http://dx.doi.org/10.3390/s18093049
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