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    Surface acoustic wave convolver with dielectric film of high non-linear effect
    1.
    发明授权
    Surface acoustic wave convolver with dielectric film of high non-linear effect 失效
    具有高非线性效应的电介质膜的表面声波卷积器

    公开(公告)号：US4882715A

    公开(公告)日：1989-11-21

    申请号：US167254

    申请日：1988-03-11

    申请人： Koichi Egara ,  Norihiro Mochizuki ,  Kenji Nakamura ,  Kazuo Yoshinaga

    发明人： Koichi Egara ,  Norihiro Mochizuki ,  Kenji Nakamura ,  Kazuo Yoshinaga

    IPC分类号： G06G7/195

    CPC分类号： G06G7/195

    摘要： In a surface acoustic wave elastic convolver capable of showing sufficiently high convolution efficiency with a simple structure, the convolver comprises a piezo-electric substrate, plural input transducers formed on the substrate for respectively generating surface acoustic waves corresponding to input signals, an output transducer for obtaining a convolution signal of the input signals, from a surface acoustic wave generated by non-linear interaction, of the surface acoustic waves generated by those input transducers, and a dielectric film of a non-linear effect larger than that of the substrate, formed on the substrate in at least an area where the output transducer is formed.

    Surface acoustic wave element and communication system using the same
    3.
    发明授权
    Surface acoustic wave element and communication system using the same 失效
    表面声波元件和通信系统使用相同

    公开(公告)号：US5367216A

    公开(公告)日：1994-11-22

    申请号：US921746

    申请日：1992-07-30

    申请人： Koichi Egara ,  Kenji Nakamura ,  Norihiro Mochizuki

    发明人： Koichi Egara ,  Kenji Nakamura ,  Norihiro Mochizuki

    IPC分类号： G06G7/195 ,  H03H9/02 ,  H01L41/08

    CPC分类号： G06G7/195 ,  H03H9/02543 ,  H03H9/02866

    摘要： A surface acoustic wave element is provided with a piezoelectic substrate, a first input transducer, a second input transducer and an output device such as output electrode. The piezoelectric substrate has a first and a second surfaces which are mutually faced. The first input transducer is formed on the first surface of the substrate to generate a first surface acoustic wave which propagates in a predetermined direction. The second transducer is formed on the first surface of the substrate to generate a second surface acoustic wave which propagates in a direction opposite to the predetermined direction. The output device is formed on the first surface of the substrate to extract a signal produced by an interaction of the first and second surface acoustic waves. At least part of the second surface of the substrate is caused to be inclined in a direction perpendicular to the predetermined direction with respect to the first surface.

    摘要翻译： 表面声波元件设置有压电基板，第一输入换能器，第二输入换能器和输出装置，例如输出电极。 压电基板具有相互面对的第一和第二表面。 第一输入传感器形成在基板的第一表面上，以产生沿预定方向传播的第一声表面波。 第二传感器形成在基板的第一表面上，以产生沿与预定方向相反的方向传播的第二声表面波。 输出装置形成在基板的第一表面上，以提取由第一和第二声表面波的相互作用产生的信号。 使基板的第二表面的至少一部分相对于第一表面在垂直于预定方向的方向上倾斜。

    Surface acoustic wave device provided with output transducer split into a plurality of portions, and communication system using the same
    4.
    发明授权
    Surface acoustic wave device provided with output transducer split into a plurality of portions, and communication system using the same 失效
    具有输出转换器分离成多个部分的表面声波装置，以及使用其的通信系统

    公开(公告)号：US5200663A

    公开(公告)日：1993-04-06

    申请号：US750392

    申请日：1991-08-27

    申请人： Norihiro Mochizuki ,  Koichi Egara ,  Kenji Nakamura

    发明人： Norihiro Mochizuki ,  Koichi Egara ,  Kenji Nakamura

    IPC分类号： G06G7/195 ,  H03H9/145

    CPC分类号： H03H9/1455 ,  G06G7/195

    摘要： A surface acoustic wave device comprises a piezoelectric substrate, a plurality of input transducers, formed on the substrate, for generating surface acoustic waves corresponding to input signals, a plurality of waveguides which are juxtaposed on a region of said substrate where the surface acoustic waves generated by said input transducers overlap each other, and in which signals are generated due to an interaction of the surface acoustic waves, the waveguides generating surface acoustic waves corresponding to the signals due to the interaction, and an output transducer for receiving the surface acoustic waves generated from the waveguides, converting the signals due to the interaction into electrical signals, and extracting the electrical signals, the output transducer being constituted by a plurality of portions, juxtaposed in a widthwise direction of the surface acoustic waves generated from the waveguides, for receiving some components of the surface acoustic waves generated from the waveguides, and outputting signals, the portions being connected to each other, so that electric fields of electrical signals output from said portions are synthesized in the same direction.

    Surface acoustic wave device and communication system using it
    5.
    发明授权
    Surface acoustic wave device and communication system using it 失效
    声表面波装置及其使用的通信系统

    公开(公告)号：US5760525A

    公开(公告)日：1998-06-02

    申请号：US681493

    申请日：1996-07-23

    申请人： Takahiro Hachisu ,  Akira Torisawa ,  Norihiro Mochizuki ,  Koichi Egara ,  Tadashi Eguchi ,  Akihiro Koyama

    发明人： Takahiro Hachisu ,  Akira Torisawa ,  Norihiro Mochizuki ,  Koichi Egara ,  Tadashi Eguchi ,  Akihiro Koyama

    IPC分类号： H03H9/72 ,  G06G7/195 ,  H03H9/145 ,  H04B1/26 ,  H01L41/08

    CPC分类号： H03H9/02787 ,  G06G7/195 ,  H03H9/14547 ,  H03H9/14561 ,  H04B1/26

    摘要： A surface acoustic wave device includes a piezoelectric substrate, first and second input transducers formed on the substrate and adapted for respectively generating surface acoustic waves corresponding to input signals, the first and second input transducers each having a shape to focus the surface acoustic waves generated thereby, an output transducer formed between the first and second input transducers on the substrate and adapted for obtaining a convolution -signal of the surface acoustic waves generated by the first and second input transducers, and conductive films, one formed between the first input transducer and the output transducer and another between the second input transducer and the output transducer on the substrate. A communication system includes a transmitter for transmitting a signal modulated according to information, a circuit for receiving the modulated signal transmitted from the transmitter, a circuit for generating a reference signal, a surface acoustic wave device, as described above, for outputting a convolution signal of the modulated signal and the reference signal, and a demodulating circuit for restoring the information, using the convolution signal output from the surface acoustic wave device.

    摘要翻译： 表面声波装置包括压电基片，形成在基片上的第一和第二输入换能器，用于分别产生对应于输入信号的表面声波，第一和第二输入换能器各自具有聚焦由此产生的表面声波的形状 形成在基板上的第一和第二输入换能器之间的输出换能器，并适于获得由第一和第二输入换能器产生的表面声波的卷积信号，以及形成在第一输入换能器和 输出换能器和另一个在第二输入换能器和基板上的输出换能器之间。 一种通信系统，包括用于发送根据信息调制的信号的发射机，用于接收从发射机发射的调制信号的电路，用于产生参考信号的电路，如上所述的表面声波装置，用于输出卷积信号 的调制信号和参考信号，以及解调电路，用于使用从声表面波装置输出的卷积信号来恢复信息。

    Elastic surface wave convolva having wave width converting means and communication system using same
    7.
    发明授权
    Elastic surface wave convolva having wave width converting means and communication system using same 失效
    具有波形宽度转换装置的弹性表面波波导和使用相同的通信系统

    公开(公告)号：US5164628A

    公开(公告)日：1992-11-17

    申请号：US702390

    申请日：1991-05-20

    申请人： Koichi Egara ,  Norihiro Mochizuki

    发明人： Koichi Egara ,  Norihiro Mochizuki

    IPC分类号： G06G7/195

    CPC分类号： G06G7/195

    摘要： An elastic surface wave convolve comprises a piezoelectric substrate, a plurality of input transducers formed on said substrate for generating elastic surface waves corresponding to respective input signals, a plurality of waveguides provided side by side on a region of the substrate where elastic surface waves radiated from the input transducers overlap, wherein a convolution signal of input signals is produced due to parametric mixing effect of elastic surface waves in respective waveguides, these waveguides generating an elastic surface wave corresponding to the convolution signal, and an output transducer for receiving the elastic surface wave radiated from the waveguides and taking out an electrical signal by conversion of the convolution signal, wherein the width of elastic surface wave radiated from the waveguides is narrower immediately before reception with the output transducer than immediately after radiation from the waveguides.

    Surface acoustic wave convolver with plural wave guide paths for generating convolution signals of mutually different phases
    10.
    发明授权
    Surface acoustic wave convolver with plural wave guide paths for generating convolution signals of mutually different phases 失效
    具有多个波导路径的表面声波卷积器，用于产生相互不同相位的卷积信号

    公开(公告)号：US5003213A

    公开(公告)日：1991-03-26

    申请号：US440853

    申请日：1989-11-24

    申请人： Norihiro Mochuzuki ,  Koichi Egara ,  Kenji Nakamura

    发明人： Norihiro Mochuzuki ,  Koichi Egara ,  Kenji Nakamura

    IPC分类号： G06G7/195

    CPC分类号： G06G7/195

    摘要： A surface acoustic wave convolver comprises a piezoelectric substrate, a plurality of input transducers formed on the substrate and adapted to respectively generate surface acoustic waves in response to input signals, and a plurality of wave guide paths parallelly provided on the substrate in a superposing area of the surface acoustic wave generated by the input transducers to each generate a convolution signal of the input signals by non-linear interaction of the surface acoustic waves therein. The convolution signals generated in neighboring wave guide paths are mutually different by 180.degree. in phase, and the wave guide paths are adapted to generate surface acoustic waves corresponding to the convolution signals and an output transducer receives the surface acoustic waves generated by the wave guide paths and converts the convolution signals into an output electrical signal.