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11. 发明授权

US5367216A Surface acoustic wave element and communication system using the same 失效
标题翻译：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。

12. 发明授权

US5200663A Surface acoustic wave device provided with output transducer split into a plurality of portions, and communication system using the same 失效
标题翻译：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.

13. 发明授权

US5539687A Correlator and communication system using it 失效
标题翻译：相关器和使用它的通信系统
公开(公告)号：US5539687A
公开(公告)日：1996-07-23
申请号：US167074
申请日：1993-12-15
申请人： Akira Torisawa , Koichi Egara , Tadashi Eguchi
发明人： Akira Torisawa , Koichi Egara , Tadashi Eguchi
IPC分类号： H03H9/145 , G06G7/195 , H03H9/72 , G06G7/12
CPC分类号： G06G7/195
摘要： A correlator includes a reference signal generating device for generating a reference signal with period T, n-convolvers each having an action time of T/n where n is an integer of at least 2, into each of which an information signal and a reference signal are input and each of which outputs a convolution signal of the information signal and the reference signal, a delay device for delaying an information signal input into a k-th convolver among the n convolvers for a time of (k-1)T/n where k=1, 2, . . . , n and for delaying a reference signal input into the k-th convolver for a time of (n-k)T/n, and an adder for adding convolution signals respectively output from the n convolvers. A receiver includes such a correlator for outputting a correlation signal of a received information signal and a reference signal, and a decoding circuit for decoding data from the correlation signal output from the correlator. A communication system includes a transmitter for transmitting an information signal, and a receiver for receiving the information signal transmitted from the transmitter and having the correlator.
摘要翻译：相关器包括用于产生具有周期T的参考信号的参考信号产生装置，每个具有T / n的动作时间的n个卷积器，其中n是至少为2的整数，其中每个信号信号和参考信号输入信号信号和参考信号的卷积信号;延迟装置，用于将输入到n个卷积器中的第k个卷积器的信息信号延迟一段时间（k-1）T / n 其中k = 1,2。。。，n并且用于将输入到第k个卷积器的参考信号延迟一段时间（n-k）T / n，以及用于添加分别从n个卷积器输出的卷积信号的加法器。接收机包括用于输出接收到的信息信号和参考信号的相关信号的相关器，以及从相关器输出的相关信号中解码数据的解码电路。通信系统包括用于发送信息信号的发送器和用于接收从发送器发送并具有相关器的信息信号的接收器。

14. 发明授权

US5011623A Nonlinear optical material and nonlinear optical device 失效
标题翻译：非线性光学材料和非线性光学器件
公开(公告)号：US5011623A
公开(公告)日：1991-04-30
申请号：US381277
申请日：1989-07-18
申请人： Kazuo Yoshinaga , Takashi Kai , Koichi Egara , Yomishi Toshida , Hideaki Mitsutake , Koichi Sato , Takeshi Miyazaki
发明人： Kazuo Yoshinaga , Takashi Kai , Koichi Egara , Yomishi Toshida , Hideaki Mitsutake , Koichi Sato , Takeshi Miyazaki
IPC分类号： C09K19/38 , G02F1/361
CPC分类号： G02F1/3615 , C09K19/38 , C09K19/3857 , C09K19/3866
摘要： A nonlinear optical material is provided by mixing a polymer liquid crystal having a chiral center and a nonlinear optical compound. The polymer liquid crystal may be a ferroelectric polymer liquid crystal. The nonlinear optical material is preferably in the form of a solid solution. A nonlinear optical device is formed by orienting the nonlinear optical material to provide an optical member.

15. 发明授权

US5003213A Surface acoustic wave convolver with plural wave guide paths for generating convolution signals of mutually different phases 失效
标题翻译：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.

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