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    • 3. 发明申请
    • COMBINATION FULL-DUPLEX AND HALF-DUPLEX ELECTRONIC IDENTIFICATION TAG
    • 组合全双工和双工双电子标识
    • WO2010028296A1
    • 2010-03-11
    • PCT/US2009/056110
    • 2009-09-04
    • ALLFLEX USA, INC.STEWART, Robert
    • STEWART, Robert
    • H04Q5/22
    • G06K19/0723G06K19/0709G06K19/0712G06K19/0726
    • Transponders are disclosed that are configurable to operate In an HDX mode and/or an FDX-B mode and that use a switchable load impedance across the transponders' resonant antenna circuit to induce amplitude and/or frequency modulation. An RF level detection circuit determines when the instantaneous activation signal strength is sufficient to support monoplex, multiplex, and diplex operation. A non-volatile memory stores identification data coded in HDX and FDX-B formats. One embodiment of the invention includes an inductive antenna including two terminals connected to tag circuitry, where the inductive antenna forms a resonant antenna circuit tuned to resonate at the frequency of the activation signal.
    • 公开了可配置为在HDX模式和/或FDX-B模式下操作并且在转发器的谐振天线电路之间使用可切换负载阻抗以引起幅度和/或频率调制的转发器。 RF电平检测电路确定瞬时激活信号强度何时足以支持单重复用,多路复用和双工操作。 非易失性存储器存储以HDX和FDX-B格式编码的标识数据。 本发明的一个实施例包括感应天线,其包括连接到标签电路的两个终端,其中感应天线形成调谐为以激活信号的频率谐振的谐振天线电路。
    • 6. 发明申请
    • INDUCTIVELY COUPLED LOOP ANTENNA FOR A RADIO FREQUENCY IDENTIFICATION READER
    • 无线电频率识别读取器的电感耦合环路天线
    • WO2009005504A1
    • 2009-01-08
    • PCT/US2007/015505
    • 2007-07-03
    • ALLFLEX USA, INC.STEWART, RobertMARTIN, Jacques
    • STEWART, RobertMARTIN, Jacques
    • H01Q7/00
    • H01Q7/00A01K11/006G06K7/10178G06K7/10336H01Q1/2216H01Q7/08
    • Systems and methods are described for reading EID tags in difficult to reach locations using a portable RFID reader. In many embodiments, the system includes a portable RFID reader and one or more stationary antenna assemblies. The stationary antenna assemblies typically include a loop antenna in a first location and a ferrite antenna in a second location. EID tags in the reading zone of the loop antenna can be read using the portable RFID reader via an inductive coupling between the resonant antenna in the portable RFID reader and the ferrite antenna in the stationary antenna assembly. One embodiment of the invention includes a portable reader having reader circuitry configured to generate an activation signal, a first resonant antenna, where the first resonant antenna is electrically connected to the reader circuitry, a reader housing containing the reader circuitry and the first resonant antenna, and a stationary antenna assembly having a resonant antenna unit including a housing and a second resonant antenna, a loop antenna unit including a housing and a loop antenna and an electrical connection between the resonant antenna unit and the loop antenna unit. In addition, the first resonant antenna in the portable reader is inductively coupled to the second resonant antenna in the stationary antenna assembly.
    • 描述了使用便携式RFID读取器在难以到达的位置读取EID标签的系统和方法。 在许多实施例中,该系统包括便携式RFID读取器和一个或多个固定天线组件。 固定天线组件通常包括位于第一位置的环形天线和位于第二位置的铁氧体天线。 环形天线的读取区域中的EID标签可以通过便携式RFID阅读器中的便携式RFID读取器中的谐振天线与固定天线组件中的铁氧体天线之间的感应耦合来读取。 本发明的一个实施例包括便携式读取器,其具有被配置为产生激活信号的读取器电路,第一谐振天线,其中第一谐振天线电连接到读取器电路,包含读取器电路和第一谐振天线的读取器壳体, 以及固定天线组件,其具有包括壳体和第二谐振天线的谐振天线单元,包括壳体和环形天线的环形天线单元以及谐振天线单元和环形天线单元之间的电连接。 此外,便携式读取器中的第一谐振天线电感耦合到固定天线组件中的第二谐振天线。
    • 9. 发明申请
    • SIGNAL CANCELLING TRANSMIT/RECEIVE MULTI-LOOP ANTENNA FOR A RADIO FREQUENCY IDENTIFICATION READER
    • 无线电频率识别读取器的信号取消发送/接收多环路天线
    • WO2011056891A1
    • 2011-05-12
    • PCT/US2010/055326
    • 2010-11-03
    • ALLFLEX USA, INC.STEWART, Robert
    • STEWART, Robert
    • H01Q7/00
    • H01Q1/00G06K7/0008G06K7/10346H01Q1/2216H01Q7/00
    • In an inductively coupled radio frequency identification (RFID) system deployed in animal and livestock applications, reading system efficacy can be compromised by animal movement on, around, or near metal structures prone to producing sonic frequencies. Such is the case, for example, when a walk-by antenna is mounted at the entry door of a livestock transport trailer, and animals transit on a metallic ramp and metallic trailer floor. Associated with the observable acoustic noise are subtle disturbances in the magnetic field surrounding the antenna due to vibrating metal altering the reluctance of the antenna's magnetic field. This acoustic noise manifests itself as an electrical noise phenomenon that interferes with the signals of certain types of identification tags which rely on amplitude modulation. The detrimental effects of acoustic noise from metal structures can be mitigated by using a multi-loop antenna that limits the spatial distribution of the transmitted magnetic field and cancels close by magnetic field disturbances.
    • 在动态和家畜应用中的电感耦合射频识别(RFID)系统中,阅读系统功效可能会受到容易产生声音频率的金属结构,周围或附近的动物运动的影响。 例如,当将步行天线安装在牲畜运输拖车的入口处,并且动物在金属斜坡和金属拖车地板上转运时。 与可观察到的声学噪声相关联是由于振动金属改变天线磁场的磁阻而在天线周围的磁场中的微小干扰。 这种声音噪声本身表现为电噪声现象,其干扰依赖于幅度调制的某些类型的识别标签的信号。 可以通过使用限制发射磁场的空间分布并通过磁场干扰来抵消的多环天线来减轻来自金属结构的声学噪声的有害影响。