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Rational Design of a Surface Acoustic Wave Device for Wearable Body Temperature Monitoring.
Xie, Yudi; Deng, Minglong; Chen, Jinkai; Duan, Yue; Zhang, Jikai; Mu, Danyu; Dong, Shurong; Luo, Jikui; Jin, Hao; Kakio, Shoji.
Afiliación
  • Xie Y; Ministry of Education Key Laboratory of RF Circuits and Systems, Hangzhou Dianzi University, Hangzhou 310018, China.
  • Deng M; Ministry of Education Key Laboratory of RF Circuits and Systems, Hangzhou Dianzi University, Hangzhou 310018, China.
  • Chen J; Ministry of Education Key Laboratory of RF Circuits and Systems, Hangzhou Dianzi University, Hangzhou 310018, China.
  • Duan Y; Ministry of Education Key Laboratory of RF Circuits and Systems, Hangzhou Dianzi University, Hangzhou 310018, China.
  • Zhang J; College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
  • Mu D; College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
  • Dong S; College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
  • Luo J; International Joint Innovation Center, Zhejiang University, Haining 314400, China.
  • Jin H; College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
  • Kakio S; International Joint Innovation Center, Zhejiang University, Haining 314400, China.
Micromachines (Basel) ; 15(5)2024 Apr 23.
Article en En | MEDLINE | ID: mdl-38793128
ABSTRACT
Continuous monitoring of vital signs based on advanced sensing technologies has attracted extensive attention due to the ravages of COVID-19. A maintenance-free and low-cost passive wireless sensing system based on surface acoustic wave (SAW) device can be used to continuously monitor temperature. However, the current SAW-based passive sensing system is mostly designed at a low frequency around 433 MHz, which leads to the relatively large size of SAW devices and antenna, hindering their application in wearable devices. In this paper, SAW devices with a resonant frequency distributed in the 870 MHz to 960 MHz range are rationally designed and fabricated. Based on the finite-element method (FEM) and coupling-of-modes (COM) model, the device parameters, including interdigital transducer (IDT) pairs, aperture size, and reflector pairs, are systematically optimized, and the theoretical and experimental results show high consistency. Finally, SAW temperature sensors with a quality factor greater than 2200 are obtained for real-time temperature monitoring ranging from 20 to 50 °C. Benefitting from the higher operating frequency, the size of the sensing system can be reduced for human body temperature monitoring, showing its potential to be used as a wearable monitoring device in the future.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Micromachines (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Micromachines (Basel) Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza