| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that the height of a conventional triaxial antenna is reduced but its thickness is 3 mm or more and can be integrated in an object such as a keyholder but cannot be integrated in a thin-shape object like an IC card.SOLUTION: Each of first to third antenna coils includes a planar coil that is wound in a circumferential direction of a winding shaft, and a sheet-like core inserted through a center hole of the planar coil. The first to third antenna coils are disposed in such a manner that, the antenna coils are not overlapped with one another, that planes of the planar coils become the same plane and that the sheet-like cores of the first to third antenna coils axially cross one another at 120°. |
