Autonomous RFID Sensor Node Using a Single ISM Band for Both Wireless Power Transfer and Data Communication

Sensors

Abderrahim Okba¹  Alexandru Takacs¹  Hervé Aubert¹  Dominique Henry¹ 

[1] LAAS-CNRS, Université de Toulouse, CNRS, INSA, UPS, 31400 Toulouse, France;

关键词: autonomous wireless sensor nodes;    wireless power transfer;    rectenna;    RFID sensor tag;   

DOI  :  10.3390/s19153330

来源: DOAJ

【 摘 要 】

This paper addresses the implementation of autonomous radiofrequency identification sensor nodes based on wireless power transfer. For size reduction, a switching method is proposed in order to use the same frequency band for both supplying power to the nodes and wirelessly transmitting the nodes’ data. A rectenna harvests the electromagnetic energy delivered by the dedicated radiofrequency source for charging a few-mF supercapacitor. For supercapacitors of 7 mF, it is shown that the proposed autonomous sensor nodes were able to wirelessly communicate with the reader at 868 MHz for 10 min without interruption for a tag-to-reader separation distance of 1 meter. This result was obtained from effective radiated powers of 2 W during the supercapacitor charging and of 100 mW during the wireless data communication.

【 授权许可】

Unknown