| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To stably carry out communication for an RFID tag provided for each information transmission medium in the state where a plurality of disc-like information transmission media are stacked, and to improve stability and ease of management of the information transmission media. <P>SOLUTION: This antenna structure mediates radio communication between an RFID tag 3 arranged along a disc-like information recording medium 2 and arranged in the radial inside of the information recording medium 2 and an RFID reader-writer device 20 located on the radial outside, and is equipped with: an antenna coil 14 arranged on a single plane and is electromagnetically coupled to an RFID antenna coil provided for the RFID tag 3; an antenna coil 15 arranged on the single plane, connected to the antenna coil 14, and electromagnetically coupled to a reader antenna coil 23 of the RFID reader/writer device 20; and a mutual interference suppression part 13 formed by sequentially laminating a first magnetic material layer, a metal material layer and a second magnetic material layer, and facing the RFID antenna coil through the antenna coil 14. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
