Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2019 Jul 29;19(15):3330.
doi: 10.3390/s19153330.

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

Abderrahim Okba  1 , Dominique Henry  2 , Alexandru Takacs  2 , Hervé Aubert  2
Affiliations

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

Abderrahim Okba et al. Sensors (Basel). .

Abstract

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.

Keywords: RFID sensor tag; autonomous wireless sensor nodes; rectenna; wireless power transfer.

PubMed Disclaimer

Conflict of interest statement

The authors declare no conflicts of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

Figures

Figure 1
Figure 1
Block diagram of the proposed autonomous wireless sensor node during (a) wireless power transfer and (b) wireless data communication. SW1 controls the transmitting mode and SW2 and SW3 control the power supply of the radiofrequency identification (RFID) sensor tag. PMU: power management unit.
Figure 2
Figure 2
Photographs of (a) the experimental setup and (b) the node rectenna. Tx: transmitting.
Figure 3
Figure 3
(a) Measured DC voltage as a function of the frequency with 10 kΩ load (see [13]); (b) Rectenna harvested DC power (continuous curve) and radiofrequency (RF)-to-DC efficiency (dashed curve) at 860 MHz with a 10 kΩ load as a function of the incident RF power density S (from [15]).
Figure 4
Figure 4
Cold start-up duration (tc) and charging time (tr) of the supercapacitor (7 mF) of the PMU for three different RF power densities: 12.6 µW/cm² (green), 7.9 µW/cm² (red), and 5.0 µW/cm² (blue) measured with an oscilloscope.
Figure 5
Figure 5
(a) Voltage at the port of the supercapacitor measured with oscilloscope (green curve) with RF power density of 12.6 µW/cm²; (b) Received signal strength indicator (RSSI) (green dots), resistance of the photoresistor (blue crosses), and temperature (orange downward-pointing triangles) are displayed only when the sensor data were successfully transmitted.
See this image and copyright information in PMC

References

    1. Ahlgren B., Hidell M., Ngai E.C.-H. Internet of Things for Smart Cities: Interoperability and Open Data. IEEE Internet Comput. 2016;20:52–56. doi: 10.1109/MIC.2016.124. - DOI
    1. Harms T., Sedigh S., Bastianini F. Structural Health Monitoring of Bridges Using Wireless Sensor Networks. IEEE Instrum. Meas. Mag. 2010;13:14–18. doi: 10.1109/MIM.2010.5669608. - DOI
    1. Mishra A., Gondal F., Afrashteh A., Wilson R. Embedded wireless sensors for aircraft/automobile tire structural health monitoring; Proceedings of the 2006 2nd IEEE Workshop on Wireless Mesh Networks; Reston, VA, USA. 25–28 September 2006; pp. 163–165.
    1. Grosinger J., Lukas G., Wolfgang B. Passive RFID sensor tag concept and prototype exploiting a full control of amplitude and phase of the tag signal. IEEE Trans. Microw. Theory Tech. 2016;64:4752–4762. doi: 10.1109/TMTT.2016.2623610. - DOI
    1. Dong T.P., Le M.T., Nguyen Q.C., Coelho A., Vuong T.P. Circularly polarized passive UHF RFID Tag on Wall for Indoor Object Identification and Localization; Proceedings of the 2014 International Conference on Advanced Technologies for Communications (ATC 2014); Hanoi, Vietnam. 15–17 October 2014; pp. 48–53.

LinkOut - more resources