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A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil

A passive temperature-sensing antenna is presented in this paper, which consists of a meandering dipole, a bimetal strip and a back cavity. The meandering dipole is divided into two parts: the lower feeding part and the upper radiating part, which maintain electric contact during operation. As a sen...

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Detalles Bibliográficos
Autores principales: Shi, Xianwei, Yang, Fan, Xu, Shenheng, Li, Maokun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5419778/
https://www.ncbi.nlm.nih.gov/pubmed/28333076
http://dx.doi.org/10.3390/s17040665
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author Shi, Xianwei
Yang, Fan
Xu, Shenheng
Li, Maokun
author_facet Shi, Xianwei
Yang, Fan
Xu, Shenheng
Li, Maokun
author_sort Shi, Xianwei
collection PubMed
description A passive temperature-sensing antenna is presented in this paper, which consists of a meandering dipole, a bimetal strip and a back cavity. The meandering dipole is divided into two parts: the lower feeding part and the upper radiating part, which maintain electric contact during operation. As a sensing component, a bimetal strip coil offers a twisting force to rotate the lower feeding part of the antenna when the temperature varies. As a result, the effective length of the dipole antenna changes, leading to a shift of the resonant frequency. Furthermore, a metal back cavity is added to increase the antenna’s quality factor Q, which results in a high-sensitivity design. An antenna prototype is designed, fabricated, and measured, which achieves a sensitivity larger than 4.00 MHz/°C in a temperature range from 30 °C to 50 °C and a read range longer than 4 m. Good agreement between the simulation and measurement results is obtained.
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spelling pubmed-54197782017-05-12 A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil Shi, Xianwei Yang, Fan Xu, Shenheng Li, Maokun Sensors (Basel) Article A passive temperature-sensing antenna is presented in this paper, which consists of a meandering dipole, a bimetal strip and a back cavity. The meandering dipole is divided into two parts: the lower feeding part and the upper radiating part, which maintain electric contact during operation. As a sensing component, a bimetal strip coil offers a twisting force to rotate the lower feeding part of the antenna when the temperature varies. As a result, the effective length of the dipole antenna changes, leading to a shift of the resonant frequency. Furthermore, a metal back cavity is added to increase the antenna’s quality factor Q, which results in a high-sensitivity design. An antenna prototype is designed, fabricated, and measured, which achieves a sensitivity larger than 4.00 MHz/°C in a temperature range from 30 °C to 50 °C and a read range longer than 4 m. Good agreement between the simulation and measurement results is obtained. MDPI 2017-03-23 /pmc/articles/PMC5419778/ /pubmed/28333076 http://dx.doi.org/10.3390/s17040665 Text en © 2017 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
Shi, Xianwei
Yang, Fan
Xu, Shenheng
Li, Maokun
A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil
title A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil
title_full A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil
title_fullStr A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil
title_full_unstemmed A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil
title_short A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil
title_sort passive temperature-sensing antenna based on a bimetal strip coil
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5419778/
https://www.ncbi.nlm.nih.gov/pubmed/28333076
http://dx.doi.org/10.3390/s17040665
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