Remotely-Powered Front-End at 2.45 GHz for Real-Time Continuous Temperature Sensing

Remote powering and power management of a passive sensor system employing antenna-rectifier co-design is presented. The operating frequency of the system is chosen at 2.45 GHz in order to reduce the antenna size. A co-design approach enables the coupling of the antenna and the rectifier for maximum power efficiency. The presented tag consists of an antenna, RF rectifier, power management circuit and a ring oscillator. Temperature sensing with the passive sensor system is demonstrated by the on-chip ring oscillator. The RF sensitivity of the integrated sensor system is -11.4 dBm while the average DC power consumption is measured as 25 mu W. The measurements prove the effectiveness of the method for maximum transfer efficiency and the use of ring-oscillator based temperature sensor for in-vivo temperature monitoring.


Published in:
2018 Ieee International Conference On Rfid (Rfid)
Presented at:
IEEE International Conference on RFID (RFID), Orlando, FL, Apr 10-12, 2018
Year:
Jan 01 2018
Publisher:
New York, IEEE
ISSN:
2374-0221
ISBN:
978-1-5386-1456-3
Keywords:




 Record created 2018-12-13, last modified 2019-08-12


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