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    • 23. 发明申请
    • Radio communications medium processing unit
    • 无线电通信媒体处理单元
    • US20050110615A1
    • 2005-05-26
    • US10991946
    • 2004-11-19
    • Futoshi DeguchiYoshitaka Mizoguchi
    • Futoshi DeguchiYoshitaka Mizoguchi
    • G06K17/00G06K7/00H04B5/00H04B5/02H04Q5/22
    • G06K7/0008
    • Providing a radio communications medium processing unit which suppresses variations in potential at the grounding end and variations in ground potential used for signal processing, thereby performing accurate signal processing. The invention comprises an antenna, a read/write section for reading or writing data, or reading and writing data from/to a radio communications medium via the antenna, a conductive line having an electric distance below the quarter wavelength of a frequency in use, the conductive line connected to the extremity of at least one grounding end present on the read/write section and the antenna, and a variable lumped constant unit for changing the lumped constant of the impedance connected at some midpoint in the conductive line, characterized in that the extremity of the conductive line is an open end.
    • 提供一种抑制接地端的电位变化和信号处理所使用的地电位变化的无线通信介质处理单元,从而进行准确的信号处理。 本发明包括天线,用于读取或写入数据的读/写部分,或者经由天线从无线电通信介质读取/写入数据,具有低于使用频率的四分之一波长的电距离的导线, 连接到存在于读取/写入部分和天线上的至少一个接地端的末端的导线以及用于改变在导线中的某个中点处连接的阻抗的集总常数的可变集总常数单元,其特征在于, 导线的末端是开口端。
    • 25. 发明授权
    • Antenna device
    • 天线设备
    • US06292154B1
    • 2001-09-18
    • US09255838
    • 1999-02-23
    • Futoshi DeguchiKazuyuki NakashimaSumio Tate
    • Futoshi DeguchiKazuyuki NakashimaSumio Tate
    • H01Q136
    • H01Q1/3275H01Q1/243H01Q1/362H01Q9/26H01Q9/28H01Q9/285
    • An antenna device includes radiation elements formed on a common antenna board, a feeding unit for feeding the radiation elements, and a ground plate provided in electrically-spaced relation to the radiation elements. The ground plate is mounted on a box-like metal body to form a short-circuit therewith. The radiation elements may have different line lengths for transmitting and receiving a plurality of wavelengths. The feeding unit may include a first radiation element having a different electrical length than a second radiation element, a first feed point for feeding electric power to the first radiation element, and a second feed point for feeding radiation elements are grounded to the ground plate at respective first and second ground points. The difference from the first and second feed points to their respective ground points are different from one another. The antenna device may have a value equal to (H)÷(&Lgr;), where (H) is the distance between the radiation elements and the ground plate, and (&Lgr;) is a wavelength of at least one frequency transmitted or received by the antenna device, and the distance H satisfies a relationship of 1÷250≦(H)÷(&Lgr;)≦1÷100.
    • 天线装置包括形成在公共天线板上的辐射元件,用于馈送辐射元件的馈送单元和与辐射元件以电隔开的关系设置的接地板。 接地板安装在盒状金属体上,与其形成短路。 辐射元件可以具有用于发射和接收多个波长的不同的线路长度。 馈电单元可以包括具有与第二辐射元件不同的电长度的第一辐射元件,用于将功率馈送到第一辐射元件的第一馈电点和用于馈送辐射元件的第二馈电点接地到接地板 相应的第一和第二接地点。 与第一和第二馈电点到它们各自的接地点的差异是不同的。 天线装置可以具有等于(H)÷(LAMBD)的值,其中(H)是辐射元件和接地板之间的距离,并且(LAMBD)是至少一个频率的波长,由 天线装置,距离H满足1÷250 <=(H)÷(LAMBD)<= 1÷100的关系。