RFID TAG COMMUNICATION METHOD AND RFID TAG COMMUNICATION SYSTEM

摘要

The intensity of a communication radio wave, which is propagated between antennas housed in reader/writers (11a, 11b) and RFID tags (10a, 10b), at positions of the RFID tags (10a, 10b) is changed. When the intensity of the communication radio wave is changed, communication is performed between the reader/writers (11a, 11b) and the FRID tags (10a, 10b). Thus, unnecessary communication with RFID tags is eliminated and communication with the target RFID tags (10a, 10b) is surely performed.