A Miniaturized Dual Band RFID Tag

This paper presents a novel highly miniaturized dual band radio frequency identification (RFID) transponder (tag) with an on-chip antenna. The tag has a size of 1.32 mm(2) and was fabricated in a low cost 130 nm complementary metal-oxide-semiconductor process. The dual band RFID tag supports the electronic product code (EPC) generation (gen) 2 high frequency (HF) standard at 13.56 M H z and the EPC gen2 ultra high frequency (UHF) standard at 868 MHz. The custom built on-chip antenna comprises two connected resonanting coils. The antenna enables inductive coupling to an RFID reader in the HF and UHF bands. The maximum tag read range is 2.5 m m at 13.56 MHz and 4.4 mm at 868 MHz. This limited read range can be further increased by different types of booster antennas.