Dual-band UHF and HF-RFID Tag Antenna for Tracking and Energy Harvesting Applications

This paper proposed the dual-band (UHF and HF) RFID tag antenna operating in the frequency bands of 920–925 MHz and 13.56 MHz for tracking and energy harvesting applications. The tag antenna consists of two parts of a patch dipole antenna for electromagnetic radiation in the UHF band and a spiral antenna for magnetic-field emission in the HF band. From the simulated results, the proposed antenna with an appropriate arrangement can provide the antenna impedance compatible with the RFID chips in both frequency bands. The measured results show that the prototype tag antenna can communicate with the maximum read range in both frequency bands and can harvest energy in the HF band.