| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely read a radio tag with the small number of antennas. <P>SOLUTION: A plane antenna 26 is disposed toward a pass area through which a passenger carrying a radio tag with him passes. The plane antenna 26 is then rotated by a motor 27 around an arbitrary point on a plane in parallel with an antenna surface so as to change a radio wave polarizing direction. <P>COPYRIGHT: (C)2008,JPO&INPIT |
