Multi-standard mono-chip HF-UHF RFID tag antenna

This paper presents feasibility study of a multi-standard RFID tag antenna. The tag permits to identify items with HF and UHF standard. The tag antenna is composed of two distinct antennas feed thanks to a single chip. UHF antenna is dipole like and HF antenna is a coil antenna. HF impedance leads to a quality factor close to 120. In order to have a resonant frequency at 13.56 MHz, the required RFID chip capacitor is 19 nF. UHF performances lead to a maximum range close to 6.5 meters on European UHF RFID frequency band and higher than 8 meters on FCC UHF RFID band. Substrate is FR4 epoxy with a relative permittivity of 4.4 and a thickness of 0.8mm.