Abstract
An RF identification (RFID) coding approach is based on the radar cross section (RCS) of a multipatch chipless RFID tag. Combined with classical frequency coding, this increases the coding capacity. This work describes a six-resonator RFID tag using microstrip patches that has a high data capacity and low-cost. It can be directly printed on products such as personal IDs, credit cards, paper and textiles because it needs only one conductive layer. It is designed to operate over the range of 4.5 to 6.2 GHz, at frequencies allocated for RFID systems.