| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a signal excited in an antenna not communicating with an IC tag from becoming a noise source to affect an antenna and circuit communicating with the IC tag. <P>SOLUTION: When an IC tag reading and writing device communicates with a first IC tag, an antenna 210 is connected to a first matching circuit 230 by use of a switching part 260 in a communication part 200 corresponding to the frequency of the first IC tag. Further, the antenna 210 is connected to a second matching circuit 240 by use of the switching part 260 in another communication part 200. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
