公开(公告)号：EP2102937A1

公开(公告)日：2009-09-23

申请号：EP07858791.2

申请日：2007-12-19

申请人： Omni-ID Limited

发明人： BROWN, James Robert ,  LAWRENCE, Christopher Robert ,  DAMERELL, William Norman

IPC分类号： H01Q1/22 ,  G06K19/077 ,  H01P7/06

CPC分类号： H01Q1/2225 ,  H01P7/00

摘要： Apparatus capable of enhancing an incident electric field to drive an electromagnetic tag (124) into operation, comprising a resonant dielectric cavity which extends out of a single plane defined between two conducting surfaces (102, 104, 106). The cavity may extend over two or more layers, and can adopt C or S shaped or spiral profiles.

公开(公告)号：EP2122750A2

公开(公告)日：2009-11-25

申请号：EP07848522.4

申请日：2007-12-13

申请人： Omni-ID Limited

发明人： JOHNSON, Daniel Robert ,  CLARKE, Paul Richard ,  LAWRENCE, Christopher Robert ,  BROWN, James Robert ,  DAMERELL, William Norman ,  DUNCOMBE, Richard James

IPC分类号： H01Q1/22 ,  G06K19/077 ,  H01P7/06

CPC分类号： H01Q1/2225 ,  G06K19/0726 ,  G06K19/07749 ,  G06K19/07771

摘要： A device capable of enhancing an electric field to drive an electromagnetic tag into operation is switchable between states to control operation of the tag. Enhancement is provided by a dielectric cavity structure defined between first and second conducting layers. Different states of the device may have different resonant frequencies and read ranges according to the characteristics of the enhancement. As such a container can be provided which includes a tag which switches states on opening, allowing improved tracking characteristics.