An interim stage between electronic article surveillance (EAS) and full-blown RFID. Chipless RFID tags use several one-bit EAS elements, each tuned to a different frequency, to create a serial number. See EAS and RFID.
"chipless RFID." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/chipless-rfid>.
chipless RFID. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/chipless-rfid