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29 条记录 (耗时 0.01 秒)

    RF TAG AND RF TAG MANUFACTURING METHOD
    5.
    发明公开
    RF TAG AND RF TAG MANUFACTURING METHOD 有权
    RF标签与RF标记的工艺，

    公开(公告)号：EP1912283A4

    公开(公告)日：2008-09-24

    申请号：EP05767180

    申请日：2005-07-29

    申请人： FUJITSU LTD

    发明人： YAMAGAJO TAKASHI ,  MANIWA TORU ,  KAI MANABU

    IPC分类号： H01Q9/16 ,  G06K19/077 ,  H01Q1/38

    CPC分类号： G06K19/07749 ,  H01Q1/2225 ,  H01Q1/38 ,  H01Q9/285 ,  Y10T29/49018

    摘要： Provided is a RF tag with which communication can be made prior to completion of the RF tag. The RF tag is provided with an integrated circuit connected to an antenna. The antenna is provided with a first radiating element, a second radiating element, a power feeding section connected in series between the first and the second radiating elements, and an impedance adjusting section connected in parallel to the power feeding section. An auxiliary radiating element connected to both of or one of the first and the second radiating elements is used for wireless communication with the integrated circuit prior to completion of the RF tag, and the auxiliary radiating element is not used for wireless communication after the completion of the RF tag. After the wireless communication is made by using the first, second and the auxiliary radiating elements, at least a part of the auxiliary radiating element is removed, and thereafter, the auxiliary radiating element does not make contribution to the wireless communication.

    TAG DEVICE, ANTENNA AND PORTABLE CARD
    7.
    发明公开
    TAG DEVICE, ANTENNA AND PORTABLE CARD 有权
    标签设备，天线和便携卡片

    公开(公告)号：EP1835564A4

    公开(公告)日：2008-11-19

    申请号：EP05703359

    申请日：2005-01-07

    申请人： FUJITSU LTD

    发明人： YAMAGAJO TAKASHI ,  MANIWA TORU ,  KAI MANABU

    IPC分类号： H01Q1/22

    CPC分类号： H01Q1/2225 ,  G06K19/07771

    摘要： To perform high quality wireless communication in which radio wave radiation/reception characteristics do not deteriorate even in the vicinity of a human body and communication of other IC tags is not impeded. A main loop section (11) is a metal foil of elongated loop-shape having an area smaller than the area of a dielectric substrate (30), and mounted to contain the dielectric substrate (30) while covering the surface and side face thereof in the horizontal direction relative to the surface of the dielectric substrate (30) in order to transmit/receive a radio wave. A capacitive load section (12) is a metal foil provided, respectively, at both ends of the main loop section (11) covering the front surface of the dielectric substrate (30) and both ends of the main loop section (11) covering the back surface of the dielectric substrate (30) and has a load of capacitance component. A control section (20) is connected with the main loop section (11) and controls information through a radio wave.

    POWER AMPLIFIER HAVING DISTORTION COMPENSATING CIRCUIT
    8.
    发明公开
    POWER AMPLIFIER HAVING DISTORTION COMPENSATING CIRCUIT 有权
    LEISTUNGSVERSTÄRKERMIT VERZERRUNGSKOMPENSATIONSSCHALTUNG

    公开(公告)号：EP1914885A4

    公开(公告)日：2008-08-13

    申请号：EP05765182

    申请日：2005-06-30

    申请人： FUJITSU LTD

    发明人： TAKANO TAKESHI ,  OISHI YASUYUKI ,  MANIWA TORU

    IPC分类号： H03F1/34

    CPC分类号： H03F1/3247 ,  H03F1/30 ,  H03F1/3282 ,  H03F2201/3209 ,  H03F2201/3212 ,  H03F2201/3224 ,  H03F2201/3233

    摘要： A power amplifier that can cancel the memory effect and to which a digital pre-distortion type of linearizer can be applied even in a low-cost device. The power amplifier has a distortion compensating circuit that compares the power of an input signal with the sample component of an output power to impart a pre-distortion to the input power such that the difference of a comparison result is minimized. The power amplifier further has a gain look-up table that stores a gain coefficient value corresponding to a temperature address required for an input power; a phase look-up table that stores a phase coefficient value corresponding to the temperature address required for the input power; a transversal filter that receives the input power and outputs the temperature address; and a coefficient multiplier that modulates the input signal by use of the gain coefficient value and the phase coefficient value read from the phase look-up table and corresponding to the temperature address.

    摘要翻译： 功率放大器可以消除记忆效应，并且即使在低成本设备中也可以应用数字预失真类型的线性化器。 功率放大器具有失真补偿电路，该失真补偿电路将输入信号的功率与输出功率的样本分量进行比较，以对输入功率施加预失真，使得比较结果的差异最小化。 功率放大器还具有增益查找表，其存储与输入功率所需的温度地址对应的增益系数值; 相位查找表，其存储对应于输入功率所需的温度地址的相位系数值; 接收输入功率并输出温度地址的横向滤波器; 以及系数乘法器，其通过使用从相位查找表读取的并且对应于温度地址的增益系数值和相位系数值来调制输入信号。

    PREDISTORTION TYPE DISTORTION COMPENSATION AMPLIFIER
    10.
    发明公开
    PREDISTORTION TYPE DISTORTION COMPENSATION AMPLIFIER 审中-公开
    预失真放大器，用于失真补偿

    公开(公告)号：EP1193866A4

    公开(公告)日：2007-02-07

    申请号：EP99922541

    申请日：1999-05-28

    申请人： FUJITSU LTD

    发明人： MANIWA TORU ,  HASEGAWA TSUYOSHI ,  KAWASAKI YOSHIHIRO

    IPC分类号： H03F1/32

    CPC分类号： H03F1/3241 ,  H03F1/3247 ,  H03F1/3252 ,  H03F1/3258 ,  H03F1/3294 ,  H03F2200/78 ,  H03F2201/3233

    摘要： A predistortion type distortion compensation amplifier (9) in mobile communication, including a signal amplitude change processing unit (10) which comprises an odd number-th component calculation unit (14) for extracting for outputting an odd number-th power component of an amplitude contained in a signal to be transmitted, a coefficient information output unit (15) for selecting for outputting one of a plurality of elements of coefficient information by means of an outside signal, a multiplication unit (16) for multiplying a signal from the odd number-th component calculation unit (14) by coefficient information from the coefficient information output unit (15) to output a damping signal and an adding unit (17) for subtracting for outputting the damping signal from the signal to be transmitted, thereby ensuring an operation within a range of a saturation region of the amplifier to reduce a spurious signal and enabling a distortion compensation operation even when an adjacent channel leakage power is reduced and a memory reference frequency is decreased.