TAG COMMUNICATION APPARATUS, METHOD AND PROGRAM OF RADIO WAVE TRANSMITTING OF THE SAME

摘要

PROBLEM TO BE SOLVED: To prevent an incommunicable RFID (Radio Frequency Identification) tag from being caused by the occurrence of an incommunicable part in a communication area.

SOLUTION: An RFID reader/writer 1 includes: a distribution part 13 for distributing a radio wave containing a transmission signal; a phase control part 18 and an attenuation width control part 19 for changing at least either a phase or an amplitude, for one of radio waves distributed by the distribution part 13, in predetermined timing; an antenna part 17 for transmitting the radio wave changed by at least either the phase control part 18 or the attenuation width control part 19; and an antenna part 16 for transmitting the other of radio waves distributed by the distribution part 13.

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