To prevent operation from being lost by electromagnetic coupling among a plurality of antenna element each for initiating read/write of RFID tags attached to a number of collected article media.
An antenna for article management initiates read/write of RFID tags attached to article media collected and preserved on a shelf 500. The antenna comprises: a plurality of loop-shaped antenna elements 100, 200 disposed at fixed intervals in parallel with the shelf whereon the collected article media are preserved; a first switch 501 for selectively feeding power to the plurality of antenna elements; and a plurality of second switches 103, 203 which are inserted into loops of the plurality of antenna elements and electrically disconnect the loop of a plurality of other antenna elements, other than one antenna element, so as not to resonate the plurality of other antenna elements while the one antenna element to which power is supplied by the first switch, is resonated.
COPYRIGHT: (C)2007,JPO&INPIT
TANABE KOSUKE
KANAI KAZUNAGA
NEC ENGINEERING LTD
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