Spectral signature-encoded chipless RFID tag with planar multiresonators

The paper discusses the development of a spectral signature-based chipless Radio Frequency Identification tag using multiple spurline resonators to encode data. Bistatic detection approach is used to decode the tag identity using either the amplitude or the phase of the spectral signature in a spurline resonator. The tag comprises two cross-polarized transmitting and receiving wideband monopole antennas connected to the multiple spurline resonators. The prototype of the tag is fabricated on a substrate C-MET/LK4.3 of dielectric constant 4.3 and loss tangent 0.0018. The measured results show that group delay response can also be used to decode the tag’s identity.