The applications of fill until full (FuF) for multiresonator-based chipless RFID system

Chipless RFID multiresonators, fabricated by Fill until Full (FuF) technique are demonstrated. In FuF, conductive material is filled into a mould with predefined dimensions. The thickness can be controlled by controlling volume of the ink, so that waste is minimized. A chipless RFID transponder consists of a multiresontor connected between 2 tranceiving antennas. A multiresonator is designed to be functioned as a stopband filter at 1.94, 2.58 and 3.49 GHz. The 3-bit signal can be encoded at these frequencies to represent 000 to 111 IDs. Chipless RFID multiresonator prototypes are designed, fabricated and measured. The measured insertion loss exhibited accurate attenuation at the defined frequencies. In conclusions, the FuF technique is proved to be appropriate for fabricating components in chipless RFID technology and for expanding the applications.