1.1 - Wireless and Battery-less Sensor Using RF Energy Harvesting

Event
etc2014 - 34. European Telemetry and Test Conference
2014-06-03 - 2014-06-05
Nürnberg
Chapter
1. Sensors & Applications
Author(s)
C. Merz, G. Kupris, M. Niedernhuber - Deggendorf Institute of Technology, Deggendorf (Germany)
Pages
8 - 13
DOI
10.5162/etc2014/1.1
ISBN
978-3-9813484-7-7
Price
free

Abstract

The contribution introduces a RF energy harvesting circuit which can be used to power a wireless and battery-less sensor system. The sensor can be powered wirelessly over a distance of about two meters. The basic principles of RF energy harvesting are explained, it is shown how the system can be designed and special considerations are discussed. The proposed RF energy harvesting system operates at a frequency of 866.6 MHz, so that far field propagation is present. The system consists of an antenna, a matching circuit, a RF-to-DC conversion circuit and a power management module, including a storage capacitor, a comparator and a DC-to-DC converter. The harvester produces a pulsed output voltage of 1.8 V at an input power of at least -6 dBm.

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