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Charge Storage Level Sensor RFID Tag: Impedance Matching and Experimental Characterisation

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publication13th European Conference on Antennas and Propagation, EuCAP 2019
ISBN (Electronic)9788890701887
Publication statusPublished - 1 Mar 2019
Publication typeA4 Article in a conference publication
EventEuropean Conference on Antennas and Propagation - Krakow, Poland
Duration: 31 Mar 20195 Apr 2019


ConferenceEuropean Conference on Antennas and Propagation


We present an RF energy harvesting system where two distinct passive UHF RFID microchips provide different tag IDs to detect low and high states of the harvester's charge storage. This enables the backend system to acknowledge when the harvesting system is ready for advanced power consuming operations. Overall, we were able to read the separate IDs of the tag at the distance of 3 m from an RFID reader that is emitting the regulated EIRP of 3.28 W and charging harvester's storage capacitor to 0.625 V through 8.7 dBi harvesting antenna.


  • Far-field RF energy harvesting, impedance matching, PIN diode, RF rectifier, RF switch, RFID

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