RFID is a mix of microchip technology and radio frequency based technology. The information is stored on microchips in the tags. It is attached to library materials using radio frequency technology and does not need item orientation or alignment with the reader or scanner.
The gates of RFID at the library can be wider like four feet since the tags can be read at a distance of two feet. It is accomplished by a couple of exit gate sensors. In order to get more information on the topic, you may search for RFID Chip Timing Bellingham Washington on the Internet.