A Novel Fully Printed 28-bits Capacity Chipless RFID Tag Based on Open Conical Resonators

A novel fully printed 28-bits capacity chipless RFID tag using conical resonators is proposed here. The angle of aperture of these resonators is adjusted to suppress high order modes allowing an efficient use of the UWB frequency bandwidth. By using 12 resonators within a reduced dimension of 4.2× 3 cm, a coding capacity of 28 bits is achieved, which is the highest coding capacity reported for a fully printed chipless tag. Several chipless tags are printed on flexible substrate and validated experimentally.