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公开(公告)号：US08167212B2
公开(公告)日：2012-05-01
申请号：US12203540
申请日：2008-09-03
IPC分类号： G06K19/06
CPC分类号： G06K19/06037 , G01S13/90 , G06K7/143
摘要： A system and method for reading an RFID data tag comprising a plurality of diffractive elements being indicative of machine-readable data carried by the tag are provided. The diffractive elements have such shape that the dimension of the diffractive elements along one axis is substantially different than the dimension of the elements along the perpendicular axis. Each diffractive element is oriented in a direction other than the direction of its neighboring elements. The system comprises a transmitting antenna configured for emitting an RF radiation signal at a predetermined polarization towards the tag; and a receiving antenna configured for collecting re-radiated RF radiation produced by the tag in response to the RF radiation signal at a polarization orthogonal to the polarization of the transmitting antenna and generating electromagnetic signals indicative of the data carried by the tag. The system also includes an interrogator unit configured for generating the transmitted RF radiation signal and processing the electromagnetic signals produced by the receiving antenna for determining the data carried by the tag.
摘要翻译： 提供一种用于读取RFID数据标签的系统和方法，包括指示由标签携带的机器可读数据的多个衍射元件。 衍射元件具有这样的形状，使得沿着一个轴的衍射元件的尺寸基本上不同于元件沿着垂直轴的尺寸。 每个衍射元件沿除了其相邻元件的方向以外的方向定向。 该系统包括：发射天线，被配置为向标签发射预定极化的RF辐射信号; 以及接收天线，被配置为在与发射天线的极化正交的偏振响应于RF辐射信号收集由标签产生的再辐射RF辐射，并产生指示由标签携带的数据的电磁信号。 该系统还包括一个询问器单元，该询问器单元被配置用于产生所发射的RF辐射信号，并处理由接收天线产生的电磁信号，以确定由该标签携带的数据。
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公开(公告)号：US20090014520A1
公开(公告)日：2009-01-15
申请号：US12203540
申请日：2008-09-03
CPC分类号： G06K19/06037 , G01S13/90 , G06K7/143
摘要： A system and method for reading an RFID data tag comprising a plurality of diffractive elements being indicative of machine-readable data carried by the tag are provided. The diffractive elements have such shape that the dimension of the diffractive elements along one axis is substantially different than the dimension of the elements along the perpendicular axis. Each diffractive element is oriented in a direction other than the direction of its neighboring elements. The system comprises a transmitting antenna configured for emitting an RF radiation signal at a predetermined polarization towards the tag; and a receiving antenna configured for collecting re-radiated RF radiation produced by the tag in response to the RF radiation signal at a polarization orthogonal to the polarization of the transmitting antenna and generating electromagnetic signals indicative of the data carried by the tag. The system also includes an interrogator unit configured for generating the transmitted RF radiation signal and processing the electromagnetic signals produced by the receiving antenna for determining the data carried by the tag.
摘要翻译： 提供一种用于读取RFID数据标签的系统和方法，包括指示由标签携带的机器可读数据的多个衍射元件。 衍射元件具有这样的形状，使得沿着一个轴的衍射元件的尺寸基本上不同于元件沿着垂直轴的尺寸。 每个衍射元件沿除了其相邻元件的方向以外的方向定向。 该系统包括：发射天线，被配置为向标签发射预定极化的RF辐射信号; 以及接收天线，被配置为在与发射天线的极化正交的偏振响应于RF辐射信号收集由标签产生的再辐射RF辐射，并产生指示由标签携带的数据的电磁信号。 该系统还包括一个询问器单元，该询问器单元被配置用于产生所发射的RF辐射信号，并处理由接收天线产生的电磁信号，以确定由该标签携带的数据。
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