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    Multichannel optical path changing device and its production method
    92.
    发明申请
    Multichannel optical path changing device and its production method 失效
    多通道光路改变装置及其制作方法

    公开(公告)号：US20070140636A1

    公开(公告)日：2007-06-21

    申请号：US10575564

    申请日：2004-10-13

    申请人： Toru Tanaka ,  Hidehisa Nanai ,  Yuji Yamamoto ,  Motoyasu Nishimura ,  Shigeki Sakaguchi

    发明人： Toru Tanaka ,  Hidehisa Nanai ,  Yuji Yamamoto ,  Motoyasu Nishimura ,  Shigeki Sakaguchi

    IPC分类号： G02B6/10

    CPC分类号： G02B6/122 ,  G02B6/12002 ,  G02B6/125 ,  G02B2006/12176

    摘要： The present invention relates to a multichannel optical path changing device that is constituted of resin optical waveguides and mirrors and that changes a direction of an optical path. This device has monolithically formed cores having a mirror therebetween and optical path directions changed, and has multichannel cores simultaneously formed under a condition that their positional relationship is maintained. This device can be produced by a first or second method. The first method comprises steps of forming a parallelepiped block on a substrate by a cladding resin; forming a film of a core layer to cover the block by a core resin; and simultaneously forming cores having an optical path direction rectangularly changed, by selectively etching the core layer and the block. The second method comprises steps of forming a film of a core layer on a substrate by a resin; and simultaneously forming a plurality of cores having an optical path rectangularly changed, by selectively etching the core layer, under a condition that their positional relationship is maintained.

    摘要翻译： 本发明涉及由树脂光波导和反射镜构成并改变光路方向的多通道光路改变装置。 该装置具有在其间具有反射镜并且光路方向改变的单片成形芯，并且在保持它们的位置关系的条件下同时形成多通道芯。 该装置可以通过第一种或第二种方法制造。 第一种方法包括通过包覆树脂在基底上形成平行六面体块的步骤; 通过芯树脂形成芯层的膜以覆盖块; 并且通过选择性地蚀刻芯层和块，同时形成光路方向的矩形变化的芯。 第二种方法包括通过树脂在基底上形成芯层的膜的步骤; 并且通过在保持其位置关系的条件下选择性地蚀刻芯层，同时形成具有矩形变化的光路的多个芯。

    Multipath distortion eliminating filter
    93.
    发明授权
    Multipath distortion eliminating filter 有权
    多路失真消除滤波器

    公开(公告)号：US07155245B2

    公开(公告)日：2006-12-26

    申请号：US10917411

    申请日：2004-08-13

    申请人： Yuji Yamamoto ,  Toshiaki Kubuki

    发明人： Yuji Yamamoto ,  Toshiaki Kubuki

    IPC分类号： H04B1/00 ,  H04B7/01

    CPC分类号： H03H21/0012

    摘要： An adaptive filter for an FM receiver comprises a digital filter, an error detection section for detecting an error between the amplitude of the output signal of the digital filter and a reference value, and a coefficient updating section for updating tap coefficients so as to minimize the error detected. The reference value for determining the error is variably set according to the amplitude of an input signal. This eliminates the effect of Doppler fading included in the reception wave and stabilize the adaptive processing. Thus, the adaptive filter can remove multipath distortion with reliability.

    摘要翻译： 用于FM接收机的自适应滤波器包括数字滤波器，用于检测数字滤波器的输出信号的幅度与参考值之间的误差的误差检测部分和用于更新抽头系数的系数更新部分，以使 检测到错误 用于确定误差的参考值根据输入信号的幅度可变地设定。 这消除了包括在接收波中的多普勒衰落的影响并且稳定了自适应处理。 因此，自适应滤波器可以可靠地去除多径失真。