IEEE Microwave and Wireless Components Letters · 2015 · 19 citations · 7 references
EngineeringElectrical EngineeringAntennasMicrowave EngineeringWireless CommunicationsElectromagnetic EnergyElectromagnetic PowerEnergy ConversionPassive ComponentsRadio-frequency Integrated CircuitsWireless Power TransferElectromagnetic Energy HarvestingEnergy Conversion EfficiencyEnergy HarvestingPassive Radio Frequency IdentificationRadio-frequency IdentificationRfid Read RangeRfid TagsThird Harmonic Injection
A new approach of integrating the passive UHF Radio Frequency Identification (RFID) technology with electromagnetic energy harvesting function is presented in this letter. The approach is based on using a passive RFID tag operating at 868 MHz for communication purposes whereas a rectifying circuit is designed to harvest its third harmonic i.e., 2.604 GHz generated by the non-linear behavior of the RFID chip. An innovative concept to re-inject the energy harvested into the RFID chip is proposed. Experimental results on the energy feedback operation has shown an RF-to-direct current (dc) conversion efficiency of 33% at -16 dBm input power for the harvesting function and a read range improvement of 2.5 m for the communication function.
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