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    Multimode transceiver circuit
    2.
    再颁专利
    Multimode transceiver circuit 有权
    多模收发电路

    公开(公告)号：USRE42604E1

    公开(公告)日：2011-08-09

    申请号：US11804730

    申请日：2000-11-17

    申请人： Ian J. Forster ,  Adrian N. Farr ,  Norman A. Howard

    发明人： Ian J. Forster ,  Adrian N. Farr ,  Norman A. Howard

    IPC分类号： H04B1/10

    CPC分类号： G06K19/07758 ,  G01S7/034 ,  G06K7/0008 ,  G06K19/0723

    摘要： A multimode transceiver circuit comprises a four port coupler of a type which splits a signal applied to one port between two of the other ports. The split signals are phase shifted by a known amount. A first port of the coupler is for receiving a signal and for outputting a signal therefrom. A controllable oscillator is connected to a second port of the coupler and switchable impedances (Schottky diodes) are connected to the remaining ports. A controller is provided for controlling the operation of the oscillator and the impedances to determine the mode of operation of the circuit. In one mode of operation, the oscillator is inoperative and at least one of the impedances is switched to operate as a non-linear impedance such that the circuit detects amplitude modulation of the signal applied to the first port. In a further mode of operation, the oscillator is operable and both impedances are switched to operate as non-linear impedance elements such that they operate as a mixer to produce an intermediate frequency signal in dependence on the signal applied to the first port. In yet a further mode of operation, the oscillator is operable, and the impedances are switched such that the oscillator frequency appears at the first port for transmission therefrom.

    摘要翻译： 多模收发器电路包括四端口耦合器，其类型是将施加到两个其它端口之间的一个端口的信号分开。 分离信号以已知量相移。 耦合器的第一端口用于接收信号并从其输出信号。 可控振荡器连接到耦合器的第二端口，并且可切换阻抗（肖特基二极管）连接到其余端口。 提供控制器用于控制振荡器的操作和阻抗以确定电路的操作模式。 在一种操作模式中，振荡器不工作，并且至少一个阻抗被切换为作为非线性阻抗工作，使得电路检测施加到第一端口的信号的幅度调制。 在另一操作模式中，振荡器是可操作的，并且两个阻抗都被切换为非线性阻抗元件，以使得它们作为混频器工作，以根据施加到第一端口的信号产生中频信号。 在另一种操作模式中，振荡器是可操作的，并且阻抗被切换，使得振荡器频率出现在第一端口以便从其传输。

    RFID devices having self-compensating antennas and conductive shields
    3.
    发明授权
    RFID devices having self-compensating antennas and conductive shields 有权
    具有自补偿天线和导电屏蔽的RFID装置

    公开(公告)号：US07652636B2

    公开(公告)日：2010-01-26

    申请号：US11247788

    申请日：2005-10-11

    申请人： Ian J. Forster ,  Adrian N. Farr ,  Norman A. Howard ,  Andrew W. Holman

    发明人： Ian J. Forster ,  Adrian N. Farr ,  Norman A. Howard ,  Andrew W. Holman

    IPC分类号： H01Q1/38 ,  G08B13/14

    CPC分类号： H01Q1/52 ,  H01Q1/22 ,  H01Q1/2225 ,  H01Q1/38

    摘要： A radio frequency identification (RFID) tag includes an antenna configuration coupled to an RFID chip, such as in an RFID strap. The antenna configuration is mounted on one face (major surface) of a dielectric material, and includes compensation elements to compensate at least to some extent for various types of dielectric material upon which the antenna configuration may be mounted. In addition, a conductive structure, such as a ground plane or other layer of conductive material, may be placed on a second major surface of the dielectric layer, on an opposite side of the dielectric layer from the antenna structure.

    摘要翻译： 射频识别（RFID）标签包括耦合到诸如RFID带中的RFID芯片的天线配置。 天线配置安装在电介质材料的一个面（主表面）上，并且包括补偿元件，至少在一定程度上补偿可安装天线配置的各种类型的电介质材料。 此外，诸如接地平面或其它导电材料层的导电结构可以放置在电介质层的与天线结构相反的一侧的电介质层的第二主表面上。

    RFID tag using a surface insensitive antenna structure
    4.
    发明授权
    RFID tag using a surface insensitive antenna structure 有权
    RFID标签采用表面不敏感的天线结构

    公开(公告)号：US07501984B2

    公开(公告)日：2009-03-10

    申请号：US11245152

    申请日：2005-10-06

    申请人： Ian J. Forster ,  Adrian N. Farr ,  Norman A. Howard ,  Andrew W. Holman

    发明人： Ian J. Forster ,  Adrian N. Farr ,  Norman A. Howard ,  Andrew W. Holman

    IPC分类号： H01Q1/38

    CPC分类号： G06K19/07718 ,  G06K19/07749 ,  G06K19/07771

    摘要： An RFID device includes conductive tabs, and a conductive structure, with a dielectric layer between the conductive tabs and the conductive structure. The conductive structure overlaps the conductive tabs and acts as a shield, allowing the device to be at least somewhat insensitive to the surface upon which it is mounted, or to the presence of nearby objects, such as goods in a carton or other container that includes the device. The dielectric layer may be a portion of the container, such as an overlapped portion of the container. Alternatively, the dielectric layer may be a separate layer, which may vary in thickness, allowing one of the conductive tabs to be capacitively coupled to the conductive structure. As another alternative, the dielectric layer may be an expandable substrate that may be expanded after fabrication operations, such as printing.

    摘要翻译： RFID设备包括导电突片和导电结构，其中介电层位于导电突片和导电结构之间。 导电结构与导电突出部重叠并用作屏蔽，允许该装置对其安装的表面至少有些不敏感，或者存在附近的物体，例如纸箱或其他容器中的货物，包括 装置。 电介质层可以是容器的一部分，例如容器的重叠部分。 或者，电介质层可以是单独的层，其可以在厚度上变化，允许导电片中的一个电容耦合到导电结构。 作为另一替代方案，电介质层可以是可以在制造操作（例如印刷）之后扩展的可扩展基底。

    Multimode transceiver circuit
    5.
    发明授权
    Multimode transceiver circuit 有权
    多模收发电路

    公开(公告)号：US06895226B1

    公开(公告)日：2005-05-17

    申请号：US10130442

    申请日：2000-11-17

    申请人： Ian J Forster ,  Adrian N Farr ,  Norman A Howard

    发明人： Ian J Forster ,  Adrian N Farr ,  Norman A Howard

    IPC分类号： G01S7/03 ,  G06K7/00 ,  G06K19/07 ,  H04B1/40

    CPC分类号： G06K19/07758 ,  G01S7/034 ,  G06K7/0008 ,  G06K19/0723

    摘要： A multimode transceiver circuit comprises a four port coupler of a type which splits a signal applied to one port between two of the other ports. The split signals are phase shifted by a known amount. A first port of the coupler is for receiving a signal and for outputting a signal therefrom. A controllable oscillator is connected to a second port of the coupler and switchable impedances (Schottky diodes) are connected to the remaining ports. A controller is provided for controlling the operation of the oscillator and the impedances to determine the mode of operation of the circuit. In one mode of operation, the oscillator is inoperative and at least one of the impedances is switched to operate as a non-linear impedance such that the circuit detects amplitude-modulation of the signal applied to the first port. In a further mode of operation, the oscillator is operable and both impedances are switched to operate as non-linear impedance elements such that they operate as a mixer to produce an intermediate frequency signal in dependence on the signal applied to the first port. In yet a further mode of operation, the oscillator is operable, and the impedances are switched such that the oscillator frequency appears at the first port for transmission therefrom.

    摘要翻译： 多模收发器电路包括四端口耦合器，其类型是将施加到两个其它端口之间的一个端口的信号分开。 分离信号以已知量相移。 耦合器的第一端口用于接收信号并从其输出信号。 可控振荡器连接到耦合器的第二端口，并且可切换阻抗（肖特基二极管）连接到其余端口。 提供控制器用于控制振荡器的操作和阻抗以确定电路的操作模式。 在一种操作模式中，振荡器不工作，并且至少一个阻抗被切换以作为非线性阻抗工作，使得该电路检测施加到第一端口的信号的幅度调制。 在另一操作模式中，振荡器是可操作的，并且两个阻抗都被切换为非线性阻抗元件，以使得它们作为混频器工作，以根据施加到第一端口的信号产生中频信号。 在另一种操作模式中，振荡器是可操作的，并且阻抗被切换，使得振荡器频率出现在第一端口以便从其传输。

    RFID tag using a surface insensitive antenna structure
    8.
    发明授权
    RFID tag using a surface insensitive antenna structure 有权
    RFID标签采用表面不敏感的天线结构

    公开(公告)号：US07379024B2

    公开(公告)日：2008-05-27

    申请号：US11636091

    申请日：2006-12-08

    申请人： Ian J. Forster ,  Adrian N. Farr ,  Norman A. Howard ,  Andrew W. Holman

    发明人： Ian J. Forster ,  Adrian N. Farr ,  Norman A. Howard ,  Andrew W. Holman

    IPC分类号： H01Q1/38

    CPC分类号： G06K19/07718 ,  G06K19/07749 ,  G06K19/07771

    摘要： An RFID device includes conductive tabs, and a conductive structure, with a dielectric layer between the conductive tabs and the conductive structure. The conductive structure overlaps the conductive tabs and acts as a shield, allowing the device to be at least somewhat insensitive to the surface upon which it is mounted, or to the presence of nearby objects, such as goods in a carton or other container that includes the device. The dielectric layer may be a portion of the container, such as an overlapped portion of the container. Alternatively, the dielectric layer may be a separate layer, which may vary in thickness, allowing one of the conductive tabs to be capacitively coupled to the conductive structure. As another alternative, the dielectric layer may be an expandable substrate that may be expanded after fabrication operations, such as printing.

    摘要翻译： RFID设备包括导电突片和导电结构，其中介电层位于导电突片和导电结构之间。 导电结构与导电突出部重叠并用作屏蔽，允许该装置对其安装的表面至少有些不敏感，或者存在附近的物体，例如纸箱或其他容器中的货物，包括 装置。 电介质层可以是容器的一部分，例如容器的重叠部分。 或者，电介质层可以是单独的层，其可以在厚度上变化，允许导电片中的一个电容耦合到导电结构。 作为另一替代方案，电介质层可以是可以在制造操作（例如印刷）之后扩展的可扩展基底。