| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely communicate with RFID (radio frequency identification) elements regardless of proximity or overlap of the arbitrary number of RFID elements. <P>SOLUTION: A data transmission/reception system for reading data from and writing data in RFID elements is provided with the arbitrary number of electromagnetic induction type RFID elements, a reader/writer having an electromagnetic induction type active antenna, and a passive antenna having an adjustment part capable of adjusting a resonance frequency stepwise or continuously. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
