| 摘要 |
<p>A first antenna device (200) includes a soft magnetic ferrite core (90), and a coil (95) of which a conductive wire is wound around an outer circumferential surface of a columnar portion of the ferrite core (90) in parallel with a substrate surface of an insulating substrate (50). In the antenna device, the ferrite core (90) includes the columnar portion around which the coil (95) is wound, and a distal portion which is thicker than the columnar portion in both end portions of the columnar portion. A ferrite core projecting portion (90a) which projects along a central axis of the columnar portion is formed in one distal portion, and an inserting hole (50a) into which the ferrite core projecting portion (90a) is inserted is formed in the insulating substrate (50). The ferrite core (90) is placed on the insulating substrate (50) in a state of inserting the ferrite core projecting portion (90a) into the inserting hole (50a).</p> |
