| 摘要 |
<P>PROBLEM TO BE SOLVED: To vary the carrier frequency of a radio wave from a reader writer. <P>SOLUTION: An exciting coil 11, a resonance circuit 12 which is electromagnetically coupled to the exciting coil 11, and an auxiliary electrode 13 to which a variable capacitor is connected are combined, and the auxiliary electrode 13 is capacitively coupled to the resonance circuit 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
