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A chipless RFID is a type of RFID tag that does not use microchip transponder, instead it uses radiofrequency (RF) energy to communicate data. Some of the chipless tags use conductive polymers or plastics instead of silicone microchip, wherein these chipless tags are digitally encoded and work at one-millimeter range. Furthermore, chipless RFID tags have features such as magnetically encoded stripe in banknotes, unique signature, and microwave reflecting fiber. These tags are predominantly used in e-passport, banking cards, and item-level tagging. The chipless RFID tags are used for asset tracking, smart tickets, anti-counterfeiting, animal tracking, air baggage, and high volume secure documents.