发明授权
- 专利标题： Method and apparatus for selectively activating radio frequency identification tags that are in close proximity
- 专利标题（中）： 用于选择性地激活非常接近的射频识别标签的方法和装置
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申请号： US09669289申请日： 2000-09-25
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公开(公告)号： US06392544B1公开(公告)日： 2002-05-21
- 发明人: Timothy James Collins , Patrick L. Rakers , Richard Stanley Rachwalski , James G. Quaderer
- 申请人： Timothy James Collins , Patrick L. Rakers , Richard Stanley Rachwalski , James G. Quaderer
- 主分类号： G08B1314
- IPC分类号： G08B1314
摘要：
A radio frequency identification exciter (200) includes a plurality of antenna elements (122a-i) that are spaced to define active areas (130a-e). A matrix switch (202) flexibly connects the plurality of antenna elements to an exciter circuit (203). Independent switches (204a-i) are selectively switched such that an electric field is generated between at least two antenna elements whereby radio frequency identification tags (132) in the vicinity of the two antenna elements are capacitively powered to exchange data with the exciter. Antenna elements other than the at least two antenna elements may be selectively coupled to a signal from the exciter circuit that inhibits activation of radio frequency identification tags in the vicinity of those antenna elements. The matrix switch preferably comprises polymer-based circuits.