Hybrid Time-Frequency Domain Architecture for Chipless RFID Readers

This paper proposes a hybrid domain architecture for chipless RFID readers that combines the advantages of current time- and frequency-domain readers. A working model of the reader has been implemented and tested in wireless measurements by detecting the resonant frequencies of two frequency-coded chipless RFID tags. The proposed reader is capable of detecting resonances of tags with a frequency offset with respect to a VNA below 3%.