RFID stands for Radio Frequency IDentification. RFID tags are cheap, very tiny electronic devices, carrying an identification code and aiming to replace the bar code for more and more applications. Instead of reading the bar code by an optical scanner, a so-called reader transmits a radio wave being reflected by the RFID tag so that the tagged item can be identified even when there is no line of sight between reader and tag. An additional RFID advantage, not offered by the bar code, is the possible wireless localization of the tagged items.
The core competence of ID4us is advanced digital signal processing to significantly boost the reader’s performance. On the tag side, ID4us is focusing on chip-less tags. Compared to classical chip-based RFID tags with a pricing down to 5 cent per tag, chip-less tags may go down to 1 cent per tag having the potential of mass market adoption. Furthermore, such chip-less tags are typically printable and bendable, meaning that they can be principally mounted on any flexible item as e.g. post stamps, newspapers, bank notes.
The overall technical challenge of chip-less RFID systems mainly depends on the knowledge about the environment and the variety of the tagged items. Therefore, ID4us approaches chip-less RFID systems by defining three successive (sub-)challenges: