| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna for a transponder which can be mounted directly on the surface of a management object without using a spacer whatever material the surface of the object might be made of. <P>SOLUTION: An antenna for a transponder comprises: a soft magnetic member 26 which is formed in a flat plate with an IC chip 13 or a capacitor connected electrically, and the back of which is mounted on an article 11; and a coil body 14b which is formed in a spiral shape and fixed on the surface of the soft magnetic member 26 so as to obtain a predetermined property in a wound state by adjusting the number of turns or the diameter. For the soft magnetic member 26, either one of an adhesive sheet obtained by adhering a plurality of flakes made of a metal or soft-magnetic ferrite to the surface of a base-material sheet made of plastic or a laminated sheet formed so as to cover a base-material sheet obtained by arranging a plurality of flakes made of a soft magnetic metal or soft magnetic ferrite on the surface of a base-material sheet made of plastic can be used. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
