Abstract
The combination of remote powering and wireless data transmission enables the monitoring of data in harsh and difficultly accessible environments, where batteries cannot be replaced or where it is not possible to supply the sensor system by wire or by thermal or photovoltaic energy harvesting. Equipping sensor nodes with RFID functionality not only enables identification and logistic applications but also an easy integration of the sensing tag into existing RFID systems. Exploiting the different characteristics of HF and UHF RFID systems, namely the large operating range in UHF and the high available power in H F, increases the flexibility of wireless sensor nodes.
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