Exploitation of Transparent Conductive Oxides in the Implementation of a Window-Integrated Wireless Sensor Node
| Autor: | Jaakkola, Kaarle, Tappura, Kirsi |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | IEEE Sensors Journal, Year: 2018, Volume: 18, Issue: 17, Pages: 7193 - 7202 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1109/JSEN.2018.2852561 |
| Popis: | Exploitation of transparent conductive oxides (TCO) to implement an energy-autonomous sensor node for a wireless sensor network (WSN) is studied and a practical solution presented. In the practical implementations, flexible and rigid substrates that is polyimide and glass, are coated with TCO, namely aluminum doped zinc oxide (AZO). AZO-coated flexible substrates are used to form thermoelectric generators (TEG) that produce electricity for the sensor electronics of the node from thermal gradients on a window. As the second solution to utilize AZO, its conductive properties are exploited to implement transparent antennas for the sensor node. Antennas for a UHF RFID transponder and the Bluetooth radio of the node are implemented. A prototype of a flexible transparent TEG, with the area of 67 cm2 when folded, was measured to produce power of 1.6 uW with a temperature difference of 43 K. A radiation efficiency of -9.1 dB was measured for the transparent RFID antenna prototype with the center frequency of 900 MHz. Radiation efficiencies between -3.8 dB and -0.4 dB, depending on the substrate, were obtained for the 2.45 GHz Bluetooth antenna. Comment: 10 pages, 14 figures, last author version accepted for publication in IEEE Sensors Journal |
| Databáze: | arXiv |
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