| 摘要 |
Electronic components, conductors, and the like that the form a detecting-and-transceiving circuit are positioned in a space inside a casing other than a space E that is enclosed by an imaginary surface that forms a predetermined angle ¸ with respect to a coil axis x toward the outside from a position on the edge of an aperture surface of the end part of a coil-shaped antenna 450 in the direction of the coil axis x. The angle ¸ is, e.g., 5° or more and is preferably 90°. Minute electronic components and conductors may be positioned within the space E if doing so does not dramatically change the magnetic current of the antenna 450. |
