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RFID Frequently Asked Question
What is a chipless RFID tag?
"Chipless RFID" is a generic term for systems that use RF energy to communicate data but don't store a serial number in a silicon microchip in the transponder. Some chipless tags use plastic or conductive polymers instead of silicon-based microchips. Other chipless tags use materials that reflect back a portion of the radio waves beamed at them. A computer takes a snapshot of the waves beamed back and uses it like a fingerprint to identify the object with the tag. Companies are experimenting with embedding RF reflecting fibers in paper to prevent unauthorized photocopying of certain documents. There are inks that reflect back radio waves at certain frequencies, enabling farmers, for example, to tattoo a chipless RFID transponder on an animal for identification purposes.
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