A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil
AbstractA 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. View Full-Text
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Shi, X.; Yang, F.; Xu, S.; Li, M. A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil. Sensors 2017, 17, 665.
Shi X, Yang F, Xu S, Li M. A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil. Sensors. 2017; 17(4):665.Chicago/Turabian Style
Shi, Xianwei; Yang, Fan; Xu, Shenheng; Li, Maokun. 2017. "A Passive Temperature-Sensing Antenna Based on a Bimetal Strip Coil." Sensors 17, no. 4: 665.
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