| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reader/writer which can reliably and accurately read and write information recorded in an RF tag attached to a mobile body surface. <P>SOLUTION: The arrangement 100 is composed of a rotating body 35 rotating in a direction of an arrow 37 around a central axis 36, an RF tag 40 attached on a surface of the rotating body 35, an antenna 9 receiving information recorded in the RF tag 40, and a reader/writer 30 reading/writing the information of the RF tag 40 through the antenna 9. The antenna 9 is composed of two loop antennas which are not shown. When a synthetic magnetic field is generated by supplying a reverse phase signal to the respective loop antennas, the loop antennas are arranged so that the synthetic magnetic field intersects with the RF tag 40. <P>COPYRIGHT: (C)2009,JPO&INPIT |
