| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wireless tag communication system which attains longest communicable range as possible. <P>SOLUTION: The wireless tag communication system comprises a BFA weight value setting part 64 for controlling directivity of a transmission antenna 70, and an adaptive process part 72 for adaptive control of the weight applied to each of reception signals received by a plurality of antenna elements 62 based on the response signal from a wireless tag 14. The directivity of the transmission antenna 70 is switched to the direction where the wireless tag 14, which is the object of communication, is expected to be disposed, and the weight applied to respective reception signals is appropriately controlled, for improved communication sensitivity relative to the wireless tag 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
