公开(公告)号：US20070081145A1

公开(公告)日：2007-04-12

申请号：US11636292

申请日：2006-12-07

申请人： Atsushi Yonetani ,  Yukio Nonoda ,  Kazuhiko Yamanouchi

发明人： Atsushi Yonetani ,  Yukio Nonoda ,  Kazuhiko Yamanouchi

IPC分类号： G01B9/00

CPC分类号： G02B21/362

摘要： An electronic imaging apparatus includes a connecting section connected to an optical apparatus; an optical element having a preset transmittance with respect to light in a preset wavelength region, incident from the optical apparatus; and an electronic image sensor receiving the light transmitted through the optical element.

公开(公告)号：US06373353B1

公开(公告)日：2002-04-16

申请号：US08860606

申请日：1997-11-18

申请人： Masao Takeuchi ,  Kazuhiko Yamanouchi ,  Hiroyuki Odagawa ,  Mitsuhiro Tanaka

发明人： Masao Takeuchi ,  Kazuhiko Yamanouchi ,  Hiroyuki Odagawa ,  Mitsuhiro Tanaka

IPC分类号： H03H964

CPC分类号： H03H9/14547 ,  H03H9/02716 ,  H03H9/14505 ,  H03H9/14517 ,  H03H9/14552 ,  H03H9/14594

摘要： In order to provide a transducer suitable for an anisotropic substrate having the NSPUDT property, on the anisotropic piezoelectric substrate being cut to have the NSPUDT property, there is formed a transducer structure having an exciting electrode structure (21) and a reflector structure (22). When &lgr; is a wavelength of a fundamental surface acoustic wave, said exciting electrode structure (21) includes a positive electrode (23) having a plurality of electrode fingers arranged at a pitch &lgr; and a negative electrode (24) having at least one electrode finger interdigitally arranged between said electrode fingers of the positive electrode with a center distance of &lgr;/2. The reflector transducer (22) includes a plurality of electrode fingers arranged with a center distance of &lgr;/2, and a distance Lg between said exciting electrode structure (21) and the reflector structure (22) is set to Lg=(2n+1)&lgr;/4 (n being a positive integer).

摘要翻译： 为了提供适合于具有NSPUDT特性的各向异性基板的换能器，在被切割为具有NSPUDT特性的各向异性压电基片上形成具有激发电极结构（21）和反射器结构（22）的换能器结构， 。 当羔羊是基本表面声波的波长时，所述激发电极结构（21）包括具有以匝数排列的多个电极指的正极（23）和具有至少一个电极指的负极（24） 在正极的所述电极指之间交叉布置，中心距离为lambd / 2。 反射器换能器（22）包括布置有中心距离lambd / 2的多个电极指，并且所述激励电极结构（21）和反射器结构（22）之间的距离Lg被设置为Lg =（2n + 1 ）lambd / 4（n为正整数）。

公开(公告)号：US06198197B1

公开(公告)日：2001-03-06

申请号：US09499467

申请日：2000-02-07

申请人： Kazuhiko Yamanouchi ,  Naohiro Kuze ,  Yoshihiko Shibata ,  Yasuhito Kanno

发明人： Kazuhiko Yamanouchi ,  Naohiro Kuze ,  Yoshihiko Shibata ,  Yasuhito Kanno

IPC分类号： H03H925

CPC分类号： H03H9/64 ,  H03F13/00 ,  H03F2200/372 ,  H03H9/02566 ,  H03H9/02574

摘要： A surface acoustic wave functional element is provided that includes a piezoelectric substrate or a multilayer piezoelectric substrate having a large electromechanical coupling coefficient. Semiconductor layers are formed on the piezoelectric substrate. The semiconductor layers include an active layer and a buffer layer. The buffer layer is formed of a structure that has a lattice constant that is the same as or similar to that of the active layer. In addition, input and output electrodes are formed on both sides of the semiconductor layers. The surface acoustic wave functional element attains a large amplification gain at low voltage, and can be used as part of a transmitting/receiving circuit in a high frequency portion of a mobile communication device.

摘要翻译： 提供了一种表面声波功能元件，其包括具有大机电耦合系数的压电基片或多层压电基片。 半导体层形成在压电基板上。 半导体层包括有源层和缓冲层。 缓冲层由具有与有源层相同或类似的晶格常数的结构形成。 另外，在半导体层的两侧形成有输入输出电极。 表面声波功能元件在低电压下获得大的放大增益，并且可以用作移动通信设备的高频部分中的发送/接收电路的一部分。

公开(公告)号：US3936679A

公开(公告)日：1976-02-03

申请号：US500697

申请日：1974-08-26

申请人： Kimio Shibayama ,  Kazuhiko Yamanouchi

发明人： Kimio Shibayama ,  Kazuhiko Yamanouchi

IPC分类号： H03H3/08 ,  H03H9/145 ,  H01L41/08

CPC分类号： H03H9/14517

摘要： An interdigital transducer used in an elastic surface wave device and including a pair of electrodes each having a common electrode and a plurality of electrode fingers connected to the common electrode, the overlap lengths of electrode fingers being uniform throughout the transducer. Floating electrodes, each having two parallel conductors connected together at one end, are disposed between the interdigital electrode fingers of the paired electrodes to weight the excitation electric field strength.This invention relates to an elastic surface wave transducer.BACKGROUND OF THE INVENTIONAn elastic surface wave device (also referred to as an acoustic surface wave device) used in the VHF band and UHF band as a filter or delay line already known to those skilled in the art. An elastic surface wave device has transmitting and receiving interdigital transducers disposed on a piezoelectric substrate. These transducers are used to convert electrical signals into elastic surface waves or vice versa.A known transducer used in an elastic surface wave device is of the uniform overlap length interdigital type comprising first and second electrodes disposed on a substrate of piezoelectric material, each of the first and second electrodes having a common electrode connected to an external terminal and a plurality of electrode fingers connected to the common electrode, the overlap lengths of the electrode fingers of the first and second electrodes being uniform throughout the transducer.However, the above-mentioned prior art uniform overlap length interdigital transducer has unsatisfactory frequency characteristics. Further, such transducer has a passband width bearing a substantially inverse proportion to the number of electrode fingers.In Proc. IEEE, Vol. 59, No. 3, p.393, March (1971) is set forth a weighting transducer with a so-called "apodized electrode" arrangement for improving the frequency response of the transducer. With this apodized type weighting transducer, the overlap lengths of the electrode fingers are made to vary in proportion to a weighting function, causing the widths of excited elastic surface wave beams to be weighted in proportion to the weighting function. Though a weighting function with respect to the frequency transmitting property of an ideal filter is sin x/x, a practically used function is, for example ##EQU1## APPROXIMATING THE FUNCTION SIN X /X.When the apodized transducers are used as input and output transducers, it is impossible to obtain the product property of the transfer functions of both transducers. For a prominent guaranteed attenuation in the stop band, however, the product property should be attained. Following is the reason why apodised type weighting transducers used as input and output transducers can not provide a desired product of transfer functions. The electrode fingers of the output transducer overlapping each other over a small length can not fully pick up an elastic surface wave having a larger beam width from the input transducer, failing to produce an output signal proportional to the weight of the beam width.To obtain, therefore, the product of transfer functions, an apodized type weighting transducer is combined with a uniform overlap length type transducer. In this case, the electrodes of the apodized type weighting transducer should be made more precisely than in the case with two weighting transducers in order to attain a prominent guaranteed attenuation in the stop band. However, this is difficult to realize.It is accordingly an object of this invention to provide a weighting transducer, which, combined with any other type of transducer, can easily realize the product property of the transfer functions of both transducers.Another object of the invention is to provide a uniform overlap length interdigital transducer with an improved frequency response.SUMMARY OF THE INVENTIONA uniform overlap length type interdigital weighting transducer of this invention is characterized in that a plurality of floating electrodes each having a pair of parallel conductors connected together at one end are disposed on a piezoelectric substrate between the adjacent interdigital electrode fingers of the first and second electrodes. The parallel conductors preferably extend along the entire overlap length of the interdigital electrode fingers of the first and second electrodes. A plurality of the above-mentioned floating electrodes arranged between pairs of interdigital electrode fingers in numbers progressively increasing from the center of the transducer to both ends thereof along the propagation axis of the elastic surface wave can weight the strength of an excitation electric field in proportion to a weighting function.When combined with any other type of transducer, the weighting transducer of this invention which has the electrode fingers overlapped by each other in the uniform length throughout the transducer, can easily realize the product property of the transfer functions of both transducers.Further, the rejection of the side lobe of the weighting transducer of this invention can be easily improved to a larger extent than 10 dB as compared with the ordinary uniform overlap length type transducer.

摘要翻译： 一种用于弹性表面波装置并且包括一对电极的叉指换能器，每对电极具有公共电极和连接到公共电极的多个电极指，电极指的重叠长度在整个换能器中是均匀的。 每个具有两端的两个平行导体连接在一起的浮动电极被设置在一对电极的叉指间电极指之间，以增加激励电场强度。

公开(公告)号：US08508101B2

公开(公告)日：2013-08-13

申请号：US12601687

申请日：2008-05-28

申请人： Kazuhiko Yamanouchi ,  Yusuke Satoh

发明人： Kazuhiko Yamanouchi ,  Yusuke Satoh

IPC分类号： H01L41/04

CPC分类号： H03H9/0222 ,  H03H9/02102 ,  H03H9/02559

摘要： The structure of the patent is a substrate wherein a metal electrode, a dielectric thin film, and a further dielectric thin film are adhered onto a piezoelectric substrate. A substrate wherein elastic wave energy is confined in the piezoelectric substrate can be obtained. In particular, when a SiO2 thin film and an AlN thin film are used as thin films 4 and 5, respectively, a substrate excellent in an electromechanical coupling coefficient (k2) and a temperature characteristic of frequency can be yielded by making the film thicknesses of electrodes 2 and 3 and those of the thin films 4 and 5 into optimal values.

摘要翻译： 该专利的结构是将金属电极，电介质薄膜和另外的电介质薄膜粘附到压电基板上的基板。 可以获得其中弹性波能量被限制在压电基板中的基板。 特别地，当分别使用SiO 2薄膜和AlN薄膜作为薄膜4和5时，可以通过使薄膜4的薄膜厚度达到机电耦合系数（k2）和频率的温度特性而优异的基板 电极2和3以及薄膜4和5的最佳值。

公开(公告)号：US07054355B2

公开(公告)日：2006-05-30

申请号：US09826626

申请日：2001-04-05

申请人： Kazuhiko Yamanouchi ,  Yasuhito Kanno ,  Hiroyuki Kato

发明人： Kazuhiko Yamanouchi ,  Yasuhito Kanno ,  Hiroyuki Kato

IPC分类号： H04B1/707

CPC分类号： H04B1/7077 ,  H04B1/70712 ,  H04B1/7093 ,  H04B2201/70707

摘要： In a spread spectrum communication using a long spreading code, a spread spectrum signal processing apparatus is provided, which is suitable for performing communication by using a correlator having a size mountable on a portable equipment. The spread spectrum signal processing apparatus has a correlator for correlating between a spread spectrum signal and a given reference signal, an A/D converter for converting a correlation signal into a digital signal, a memory for storing the digital signal from the AD converter as digital data, a signal processor for summing digital data corresponding to each of divided codes C1–C16 and for outputting a result of summation, and a control unit for controlling to apply each of the divided codes C1–C16 in this order repeatedly as a reference signal to the correlator. The signal processor begins a summing process by making reference to a timing signal from the control unit.

摘要翻译： 在使用长扩展码的扩展频谱通信中，提供了一种扩展频谱信号处理装置，其适于通过使用具有可安装在便携式设备上的尺寸的相关器进行通信。 扩频信号处理装置具有用于将扩频信号和给定参考信号相关的相关器，将相关信号转换为数字信号的A / D转换器，将来自AD转换器的数字信号存储为数字信号的存储器 数据，用于对应于每个划分代码C 1 -C 16的数字数据的信号处理器，并用于输出求和的结果;以及控制单元，用于控制应用 每个分割代码C 1 -C 16以此顺序重复作为到相关器的参考信号。 信号处理器通过参考来自控制单元的定时信号来开始求和处理。

公开(公告)号：US5438306A

公开(公告)日：1995-08-01

申请号：US85121

申请日：1993-07-01

申请人： Kazuhiko Yamanouchi ,  Mitsuhiro Tanaka ,  Yasufumi Horio

发明人： Kazuhiko Yamanouchi ,  Mitsuhiro Tanaka ,  Yasufumi Horio

IPC分类号： H03H9/145 ,  H03H9/64

CPC分类号： H03H9/6426 ,  H03H9/14505

摘要： A surface acoustic wave filter device includes a substrate which includes quartz or the like piezoelectric material having a small temperature coefficient. The substrate has a surface which is formed with interdigital-type unidirectional transducers on input and output sides, each having a positive electrode and a negative electrode. The positive electrodes and the negative electrodes of each of the input side and output side transducers have electrode fingers which are arranged so as to transduce a harmonic wave of a selected order which is higher relative to a fundamental surface acoustic wave.

摘要翻译： 表面声波滤波器装置包括具有温度系数小的石英等压电材料的基板。 基板具有在输入侧和输出侧形成有叉指型单向换能器的表面，每个具有正极和负极。 输入侧和输出侧换能器中的每一个的正电极和负电极具有电极指，其布置成转换相对于基本声波较高的所选次序的谐波。

公开(公告)号：US20100171389A1

公开(公告)日：2010-07-08

申请号：US12601687

申请日：2008-05-28

申请人： Kazuhiko Yamanouchi ,  Yusuke Satoh

发明人： Kazuhiko Yamanouchi ,  Yusuke Satoh

IPC分类号： H01L41/04

CPC分类号： H03H9/0222 ,  H03H9/02102 ,  H03H9/02559

摘要： The structure of the patent is a substrate wherein a metal electrode, a dielectric thin film, and a further dielectric thin film are adhered onto a piezoelectric substrate. A substrate wherein elastic wave energy is confined in the piezoelectric substrate can be obtained. In particular, when a SiO2 thin film and an AlN thin film are used as thin films 4 and 5, respectively, a substrate excellent in an electromechanical coupling coefficient (k2) and a temperature characteristic of frequency can be yielded by making the film thicknesses of electrodes 2 and 3 and those of the thin films 4 and 5 into optimal values.

摘要翻译： 该专利的结构是将金属电极，电介质薄膜和另外的电介质薄膜粘附到压电基板上的基板。 可以获得其中弹性波能量被限制在压电基板中的基板。 特别地，当分别使用SiO 2薄膜和AlN薄膜作为薄膜4和5时，可以通过使薄膜4的薄膜厚度达到机电耦合系数（k2）和频率的温度特性而优异的基板 电极2和3以及薄膜4和5的最佳值。

公开(公告)号：US06791237B2

公开(公告)日：2004-09-14

申请号：US10085943

申请日：2002-02-28

申请人： Kazuhiko Yamanouchi

发明人： Kazuhiko Yamanouchi

IPC分类号： H01L4108

CPC分类号： H03H9/02574 ,  H03H9/02559

摘要： Disclosed is a surface acoustic wave substrate including: a piezoelectric or electrostrictive substrate having large electromechanical coupling coefficient; and a thin film formed on the substrate and having variation characteristics of frequency of a surface acoustic wave relative temperature variation opposite to that of the substrate. The substrate is a LiNbO3 substrate having a cut angle of rotated Y plate within a range from −10° to +30° and propagating a piezoelectric leaky surface wave having a propagation velocity higher than that of a Rayleigh type surface acoustic wave along X-axis direction or within a range of ±5° with respect to X-axis direction. A value of H/&lgr; falls within a range from 0.05 to 0.35, where H is the film thickness of the thin film, and &lgr; is the wavelength of operating center frequency of the piezoelectric leaky surface wave.

摘要翻译： 公开了一种表面声波基板，包括：具有大的机电耦合系数的压电或电致伸缩基板; 以及形成在基板上的薄膜，并且具有与基板相反的表面声波的相对温度变化的频率的变化特性。 衬底是具有在-10°至+ 30°范围内旋转的Y板的切割角的LiNbO 3衬底，并且传播具有比X轴的瑞利型表面声波的传播速度更高的传播速度的压电泄漏表面波 方向或相对于X轴方向±5°的范围内。 H /λ的值在0.05至0.35的范围内，其中H是薄膜的膜厚，λ是压电泄漏表面波的工作中心频率的波长。

公开(公告)号：US5773911A

公开(公告)日：1998-06-30

申请号：US901277

申请日：1997-07-29

申请人： Mitsuhiro Tanaka ,  Masao Takeuchi ,  Kazuhiko Yamanouchi ,  Hiroyuki Odagawa

发明人： Mitsuhiro Tanaka ,  Masao Takeuchi ,  Kazuhiko Yamanouchi ,  Hiroyuki Odagawa

IPC分类号： H03H9/02 ,  H03H9/145

CPC分类号： H03H9/02543 ,  H03H9/14505

摘要： A surface acoustic wave device including a piezoelectric substrate having NSPUDT behavior and a directionality reversed electrode structure including positive electrode, negative electrode and floating electrode. Positive and negative electrode fingers each having a width of .lambda./8 are arranged interdigitally at a pitch of .lambda. and floating electrode fingers having a width of 3 .lambda./8 are arranged between successive positive and negative fingers with an edge distance of .lambda./8. A directivity due to NSPUDT behavior of the substrate can be reversed. Positive and negative electrode fingers are arranged interdigitally at a pitch of .lambda. and between successive positive and negative electrode fingers are arranged floating electrode fingers having a reflecting coefficient different from that of the positive and negative electrodes.

摘要翻译： 包括具有NSPUDT行为的压电基片和包括正极，负极和浮动电极的方向性反转电极结构的表面声波装置。 每个具有λ/ 8宽度的正电极指和负电极指以十字形的间距设置，并且具有3λ/ 8宽度的浮动电极指被布置在连续的正极和负极之间，边缘距离为λ/ 8。 由于衬底的NSPUDT行为引起的方向性可以颠倒。 正电极指和负电极指以叉指间隔地布置，并且连续的正电极指和负电极指之间布置有具有与正极和负极的反射系数不同的反射系数的浮动电极指。