| 摘要 |
PROBLEM TO BE SOLVED: To provide an RFID tag built-in ring in which an RFID tag having resistance to an impact or an attack without impairing appearance to the utmost and being able to obtain sufficient communication sensitivity even as worn to a finger is built in a metal ring such as a finger ring or a bracelet.SOLUTION: In an RFID tag built-in ring in which an RFID tag 20 is built in a metal ring 10, the RFID tag 20 is fixed to a cutout 11 portion formed such that the cutout 11 portion penetrates in a non-contact state with the ring 10 in the same direction as a central axis direction of the ring 10 in the ring 10 by a medium made of an insulating material in a direction such that a plane formed by a coil antenna 22 of the RFID tag 20 is orthogonal to the central axis direction. |
