| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a non-contact data carrier device capable of reducing fluctuation of resonant frequency even if non-contact data carrier devices are stacked, and achieving stable performance over a wider band of frequencies, and an auxiliary antenna for a non-contact data carrier that is a component of the device. <P>SOLUTION: The non-contact data carrier device 1a includes a non-contact data carrier 2 having an IC chip 21 capable of storing data and a main antenna 22 connected to the IC chip 21; and a plurality of independent auxiliary antennas 4, 5 for a non-contact carrier that are coupled to the main antenna 22 without making contact, to amplify electric waves sent and received by the main antenna 22. The plurality of independent auxiliary antennas 4, 5 are given different resonant impedances so as to achieve stable performance over a wider range of frequencies. <P>COPYRIGHT: (C)2008,JPO&INPIT |
