Cross-polarized printable chipless RFID tag with superior data capacity

A novel technique in chipless RFID systems is presented providing high data capacity on a fully printable tag. Tag structure includes small polarizers that orthogonally backscatter signal respect to the interrogation wave. The reader utilizes a simple continuous wave (CW) form on its separate TX and RX antennas. The fully printable tag is capable of carrying up to 35 bits in a credit card size while the system is very robust towards multipath, clutter and noise. The printer inaccuracy is also considered in the proposed theory and suitable solution is suggested. High data capacity, small frequency band usage, fully printable tag, robustness to multipath and noise are the main aspects of the proposed technique.