| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna having improved radio wave reception efficiency (reception sensitivity) with eddy current loss occurring in the vicinity of metal being suppressed. <P>SOLUTION: An antenna 101 is composed of a core 120 in the middle part of which a coil 130 is wound, and a magnetic member 141. The magnetic member 141, opposed to the coil 130, is composed of two magnetic flakes 141a and 141b which are almost similar in size and shape, by being isolated in the middle part of a single board whose longitudinal direction is placed along an axis direction of the core 120. The distance between the core 120 and the magnetic flakes 141a and 141b is longest at end portions 141ac and 141bc of the middle part side where the coil 130 of the core 120 is wound, and becomes gradually shorter as it comes closer to an end portion 141be. <P>COPYRIGHT: (C)2009,JPO&INPIT |
