Auto-tuned RFID reader antenna
    1.
    发明授权
    Auto-tuned RFID reader antenna 有权
    自动调谐RFID阅读器天线

    公开(公告)号:US07439860B2

    公开(公告)日:2008-10-21

    申请号:US11387755

    申请日:2006-03-22

    申请人: David Andresky

    发明人: David Andresky

    IPC分类号: G08B13/14

    CPC分类号: G06K7/0008 G06K7/10316

    摘要: A reader for an RFID system includes an antenna assembly, a signal driver and a controller. The antenna assembly has an antenna coupled to an antenna tuning circuit which includes a variable capacitance circuit. The signal driver is coupled to the antenna assembly to apply a drive signal to the antenna assembly. The controller is coupled to the antenna assembly to determine a difference between an antenna impedance and a signal driver impedance and to set the variable capacitance at a set capacitance value which reduces the impedance difference.

    摘要翻译: 用于RFID系统的读取器包括天线组件,信号驱动器和控制器。 天线组件具有耦合到天线调谐电路的天线,其包括可变电容电路。 信号驱动器耦合到天线组件以向天线组件施加驱动信号。 控制器耦合到天线组件以确定天线阻抗和信号驱动器阻抗之间的差异,并将可变电容设置在降低阻抗差的设定电容值。

    Auto-tuned RFID reader antenna
    2.
    发明申请
    Auto-tuned RFID reader antenna 有权
    自动调谐RFID阅读器天线

    公开(公告)号:US20070222605A1

    公开(公告)日:2007-09-27

    申请号:US11387755

    申请日:2006-03-22

    申请人: David Andresky

    发明人: David Andresky

    IPC分类号: G08B13/14

    CPC分类号: G06K7/0008 G06K7/10316

    摘要: A reader for an RFID system includes an antenna assembly, a signal driver and a controller. The antenna assembly has an antenna coupled to an antenna tuning circuit which includes a variable capacitance circuit. The signal driver is coupled to the antenna assembly to apply a drive signal to the antenna assembly. The controller is coupled to the antenna assembly to determine a difference between an antenna impedance and a signal driver impedance and to set the variable capacitance at a set capacitance value which reduces the impedance difference.

    摘要翻译: 用于RFID系统的读取器包括天线组件,信号驱动器和控制器。 天线组件具有耦合到天线调谐电路的天线,其包括可变电容电路。 信号驱动器耦合到天线组件以向天线组件施加驱动信号。 控制器耦合到天线组件以确定天线阻抗和信号驱动器阻抗之间的差异,并将可变电容设置在降低阻抗差的设定电容值。