Abstract:
This project presents the realization of a chipless Radio Frequency Identification (RFID) tag using
L-shaped resonators for effective band utilization. Chipless RFID tags do not have an integrated
circuit (IC) and instead use passive resonant structures to encode information. The tag is made up
of a series of resonators that are designed to resonate at specific frequencies. Each resonator is
designed to have a unique resonant frequency that corresponds to a specific bit of information.
They have applications in inventory tracking, object identification, anti-counterfeiting, and other
similar fields.
When the tag is exposed to an electromagnetic field, the resonators absorb energy from the field
and begin to resonate at their respective frequencies. The reader then detects the spectral response
of the tag, which provides information about the resonant frequencies and, therefore, the encoded
information. In this project chipless RFID tag is designed on a low-cost FR-4 substrate with copper
resonators, measuring 14mm by 14mm. The resonators are designed to resonate at specific.
frequencies and encode information in the spectral domain. The tag operates in the microwave.
frequency range, from 4 to 12 GHz.
