Wireless Detection of Moving Chipless Tags made of Metamaterial Resonators

摘要

An innovative reading procedure based on the Inverse Synthetic Aperture Radar technique aimed at improving the reliability of chipless RFID tags wireless detection is presented. More in detail, the considered scenario comprises a moving tagged item travelling along a known path. The detection scheme relies on the integration of multiple received signals and benefits from the information on the background echo, which is intrinsic to the procedure. This technique greatly enhances the detection probability in complex scenarios subject to a high level of clutter. An equivalent model for the detection procedure of chipless tags in a noisy environment is presented. Successful experimental tests of tag readings with low Signal to Noise Ratio(SNR) are illustrated.