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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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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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. |
format | Online Article Text |
id | pubmed-5419778 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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