RFID TAG AND RFID SYSTEM

摘要

Two antennas (11A, 11B) and an IC chip (12) that independently operates the antennas (11A, 11B) are provided in a package (10) of an RFID tag (1). Communication ranges A and B expanding in different directions when viewed from a front surface (10a) of the package (10) are set by adjusting a directive characteristic of radio wave from each of the antennas (11A, 11B). A reader/writer communicating with the tag (1) selects one of the communication ranges A and B, and transmits a command including the identification information on the selected communication range. A control circuit in the IC chip (12) executes the command on the condition that identification information included in the received command is matched with the antenna receiving the command, and returns response information through an antenna unit that receives the command.