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Design of an Ultra-low Power Wireless Temperature Sensor Based on Backscattering Mechanism

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Abstract

In this paper, we propose a passive wireless temperature sensor for long-term and long-range application. A novel architecture of the wireless temperature sensor is proposed based on backscattering mechanism of RFID technology for ultra-low power application. The temperature sensor adopts phase-locked loop-based architecture and can achieve the temperature-digital conversion in frequency domain without any external clock signal. The rectifier employs a gate-boosting scheme to improve the power conversion efficiency. The measurement results show that the proposed wireless temperature sensor obtains a high linearity with a resolution of 0.3 °C/LSB. The measured minimum power dissipation is 2.7 µW, resulting in a maximum operating distance of 34 m under 4 W radiation power.

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Acknowledgements

This work was supported by Natural Science Foundation of China (51767006), Key Research and Development Plan of Jiangxi Province (20161BBE50075), Natural Science Foundation of Jiangxi Province (20171BAB206045), Science and Technology Project of Education Department of Jiangxi Province (GJJ160491, GJJ170378).

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Authors and Affiliations

  1. School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang, 330013, China

    Zhongbin Chen, Fangming Deng, Zhihui Fu & Xiang Wu

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  1. Zhongbin Chen
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  2. Fangming Deng
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  3. Zhihui Fu
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  4. Xiang Wu
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Correspondence to Fangming Deng.

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Chen, Z., Deng, F., Fu, Z. et al. Design of an Ultra-low Power Wireless Temperature Sensor Based on Backscattering Mechanism. Sens Imaging 19, 24 (2018). https://doi.org/10.1007/s11220-018-0207-x

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  • DOI: https://doi.org/10.1007/s11220-018-0207-x

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