Variable frequency radio frequency identification (RFID) tags
    1.
    发明授权
    Variable frequency radio frequency identification (RFID) tags 失效
    变频射频识别(RFID)标签

    公开(公告)号:US07132946B2

    公开(公告)日:2006-11-07

    申请号:US10820584

    申请日:2004-04-08

    IPC分类号: G08B13/14

    摘要: Various radio frequency identification (RFID) tags are described that dynamically vary their resonant frequency to reduce or eliminate the potential effects of electromagnetic “tag-to-tag” coupling. An RFID tag, for example, includes a main antenna tuned to a first resonant frequency, and switching circuitry that dynamically changes the resonant frequency of the main antenna. The switching circuitry may selectively couple electrical elements, such as capacitive elements, inductive elements, or combinations thereof, to vary the resonant frequency of the RFID tag. The RFID tag may include a sensing circuit that determines when to selectively couple the electrical element to the main antenna to adjust the resonant frequency of the main antenna.

    摘要翻译: 描述了各种射频识别(RFID)标签,其动态地改变其谐振频率以减少或消除电磁“标签到标签”耦合的潜在影响。 例如,RFID标签包括调谐到第一谐振频率的主天线和动态地改变主天线的谐振频率的开关电路。 开关电路可以选择性地耦合电气元件,例如电容元件,电感元件或其组合,以改变RFID标签的谐振频率。 RFID标签可以包括感测电路,其确定何时选择性地将电气元件耦合到主天线以调节主天线的谐振频率。

    Extended RFID tag
    2.
    发明申请
    Extended RFID tag 审中-公开
    扩展RFID标签

    公开(公告)号:US20090085750A1

    公开(公告)日:2009-04-02

    申请号:US11904625

    申请日:2007-09-27

    IPC分类号: G08B13/14

    摘要: The invention is directed to an extended radio-frequency identification (RFID) tag. The extended RFID tag includes an ultra-high frequency (UHF) RFID tag having a dipole antenna attached to a first surface of a substrate. The extended RFID tag further includes an antenna extension attached to the UHF RFID tag and overlapping at least a portion of the dipole antenna for electromagnetically coupling the antenna extension and the dipole antenna in operation. The extended RFID tag further includes an insulator positioned between the dipole antenna and the antenna extension to electrically isolate the dipole antenna from the antenna extension.

    摘要翻译: 本发明涉及一种扩展射频识别(RFID)标签。 扩展RFID标签包括具有附接到基板的第一表面的偶极天线的超高频(UHF)RFID标签。 扩展RFID标签还包括附接到UHF RFID标签的天线延伸部分,并且与偶极子天线的至少一部分重叠,用于在操作中电磁耦合天线延伸部分和偶极天线。 扩展RFID标签还包括位于偶极天线和天线延伸部之间的绝缘体,以将偶极天线与天线延伸部电隔离。

    Device for verifying a location and functionality of a radio-frequency identification (RFID) tag on an item
    4.
    发明申请
    Device for verifying a location and functionality of a radio-frequency identification (RFID) tag on an item 审中-公开
    用于验证物品上的射频识别(RFID)标签的位置和功能的装置

    公开(公告)号:US20090167502A1

    公开(公告)日:2009-07-02

    申请号:US12006284

    申请日:2007-12-31

    IPC分类号: G08B13/14 G06K7/00 H04Q5/22

    摘要: A Radio-Frequency Identification (RFID) system verifies proper placement and functionality of RFID tags with respect to particular end-use RFID systems at the time the RFID tag is applied to an item but before the item is deployed. A device for verifying a location and functionality of an RFID tag on an item includes an item holder, a power coupling mechanism attached to the item holder, and an RFID reader electrically connected to the power coupling mechanism. The power coupling mechanism creates a near field for transmission of read or write commands from the RFID reader to an RFID tag on an item placed on the item holder to verify the location and functionality of the RFID tag as applied to the item with respect to a near-field coupling mechanism of a particular end-use RFID system. The device may include additional power coupling mechanisms for testing the functionality of the tag.

    摘要翻译: 射频识别(RFID)系统在将RFID标签应用于物品时,但在物品部署之前,验证RFID标签相对于特定终端RFID系统的正确放置和功能。 用于验证物品上的RFID标签的位置和功能的装置包括物品保持器,附接到物品保持器的动力耦合机构和电连接到动力耦合机构的RFID读取器。 功率耦合机构创建近场以将读取或写入命令从RFID读取器传输到放置在物品保持器上的物品上的RFID标签,以验证RFID标签在位置和功能方面的应用于相对于物品的位置和功能 特定终端RFID系统的近场耦合机制。 该装置可以包括用于测试标签的功能的附加功率耦合机构。

    Variable frequency radio frequency identification (RFID) tags
    8.
    发明授权
    Variable frequency radio frequency identification (RFID) tags 失效
    变频射频识别(RFID)标签

    公开(公告)号:US07304577B2

    公开(公告)日:2007-12-04

    申请号:US11555699

    申请日:2006-11-02

    IPC分类号: G08B13/14

    摘要: Various radio frequency identification (RFID) tags are described that dynamically vary their resonant frequency to reduce or eliminate the potential effects of electromagnetic “tag-to-tag” coupling. An RFID tag, for example, includes a main antenna tuned to a first resonant frequency, and switching circuitry that dynamically changes the resonant frequency of the main antenna. The switching circuitry may selectively couple electrical elements, such as capacitive elements, inductive elements, or combinations thereof, to vary the resonant frequency of the RFID tag. The RFID tag may include a sensing circuit that determines when to selectively couple the electrical element to the main antenna to adjust the resonant frequency of the main antenna.

    摘要翻译: 描述了各种射频识别(RFID)标签,其动态地改变其谐振频率以减少或消除电磁“标签到标签”耦合的潜在影响。 例如,RFID标签包括调谐到第一谐振频率的主天线和动态地改变主天线的谐振频率的开关电路。 开关电路可以选择性地耦合电气元件,例如电容元件,电感元件或其组合,以改变RFID标签的谐振频率。 RFID标签可以包括感测电路,其确定何时选择性地将电气元件耦合到主天线以调节主天线的谐振频率。

    Device for verifying a location of a radio-frequency identification (RFID) tag on an item
    9.
    发明授权
    Device for verifying a location of a radio-frequency identification (RFID) tag on an item 失效
    用于验证物品上的射频识别(RFID)标签的位置的装置

    公开(公告)号:US07295120B2

    公开(公告)日:2007-11-13

    申请号:US11008858

    申请日:2004-12-10

    IPC分类号: G08B13/14

    CPC分类号: G06K7/00 G06K2017/0051

    摘要: A device for verifying a location of a radio-frequency identification (RFID) tag on an item. One embodiment of the invention provides a device for verifying the location of an RFID tag on an item including: an item holder; and an RF antenna attached to the item holder, where the item holder includes a readable volume where the RF antenna can read or write to an RFID tag, and where the item holder includes a non-readable volume where the RF antenna cannot read or write to an RFID tag. The present invention also relates to methods of verifying the location of a radio-frequency identification (RFID) tag on an item.

    摘要翻译: 一种用于验证物品上的射频识别(RFID)标签的位置的装置。 本发明的一个实施例提供了一种用于验证RFID标签在物品上的位置的装置,包括:物品保持器; 以及附接到物品托架的RF天线,其中物品保持器包括可读取的体积,其中RF天线可以读取或写入RFID标签,并且其中物品保持器包括RF天线不能读取或写入的不可读卷 到RFID标签。 本发明还涉及验证物品上的射频识别(RFID)标签的位置的方法。