Evaluation of 13.56 MHz RFID system considering communication distance between reader and tag

Abstract

RFID system becomes one of the very useful tools for the management of the library. Using electromagnetic coupling, an RFID tag can get power supplier by a reader and communicate with it for data exchange. Because the RFID system enables non-contact communication, various services and applications including the management of a library catalogue are possible. However, because the system is affected easily by neighboring environment, the communication performance is low. In this paper, by using 13.56 MHz RFID system, we evaluate the resonant frequency of RFID tag and the communication distance between the reader and the target tag when some tags becoming as interference sources come close to each other, and show the possibility to expand the communication distance by using tags near the target tag.