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148 条记录 (耗时 0.014 秒)

    Active waveguide coupler for surface acoustic waves
    91.
    发明授权
    Active waveguide coupler for surface acoustic waves 失效
    用于表面声波的有源波导耦合器

    公开(公告)号：US4387353A

    公开(公告)日：1983-06-07

    申请号：US832507

    申请日：1977-09-12

    申请人： Thomas G. Giallorenzi ,  Joseph F. Weller

    发明人： Thomas G. Giallorenzi ,  Joseph F. Weller

    IPC分类号： G10K11/36 ,  H01P5/04 ,  H01P5/18

    CPC分类号： G10K11/36

    摘要： Coupling devices for SAW's, which permit switching of SAW power between cnels. Channel waveguides are laid down on or in the surface of a substrate. The waveguides have a coupling region in which they are close to each other. The input waveguide is formed from a material whose acoustic wave velocity characteristic can be changed by an external means. Various means for altering the velocity of the SAW, such as electric or optical fields, are employed by applying them to the coupling region of the input waveguide.

    摘要翻译： 用于SAW的耦合器件允许在通道之间切换SAW功率。 通道波导放置在基板表面上或表面上。 波导具有彼此接近的耦合区域。 输入波导由声波速度特性可以通过外部装置改变的材料形成。 通过将SAW施加到输入波导的耦合区域，可以采用用于改变SAW的速度的诸如电场或光场的各种装置。

    Surface acoustic wave transducer
    92.
    发明授权
    Surface acoustic wave transducer 失效
    表面声波传感器

    公开(公告)号：US4363990A

    公开(公告)日：1982-12-14

    申请号：US212685

    申请日：1980-12-03

    申请人： Osamu Yamazaki ,  Junichi Inohara ,  Kazuo Tazuke ,  Kiyotaka Wasa

    发明人： Osamu Yamazaki ,  Junichi Inohara ,  Kazuo Tazuke ,  Kiyotaka Wasa

    IPC分类号： H03H3/08 ,  G10K11/36 ,  H03H9/145 ,  H03H9/64 ,  H01L41/08

    CPC分类号： G10K11/36 ,  H03H9/145

    摘要： A surface acoustic wave transducer having a piezoelectric thin film, interdigital electrodes disposed on one side surface of said piezoelectric thin film and an apodized counter electrode disposed on the opposite-side surface of said piezoelectric thin film. The outline of the apodized counter electrode is composed of parallel edges parallel to fingers of the interdigital electrode and perpendicular edges perpendicular to the fingers. The parallel edges are positioned in gaps between the fingers, so as not to lie over the fingers. Such structure remarkably reduces the deviation of characteristics of the transducer due to the incomplete alignment of the counter electrode with the interdigital electrode.

    摘要翻译： 具有压电薄膜的表面声波传感器，设置在所述压电薄膜的一个侧表面上的叉指电极和设置在所述压电薄膜的相对侧表面上的变迹对置电极。 变迹对置电极的轮廓由平行于叉指电极的指状物的平行边缘和垂直于手指的垂直边缘组成。 平行的边缘位于手指之间的间隙中，以便不会在手指上。 由于对电极与叉指电极的不完全对准，这种结构显着地降低了换能器特性的偏差。

    Acoustic wave devices
    93.
    发明授权
    Acoustic wave devices 失效
    声波装置

    公开(公告)号：US4336514A

    公开(公告)日：1982-06-22

    申请号：US188284

    申请日：1980-09-18

    申请人： Edward G. S. Paige

    发明人： Edward G. S. Paige

    IPC分类号： G10K11/36 ,  H03H9/02 ,  H03H9/25 ,  H03H9/64 ,  H03H9/135

    CPC分类号： G10K11/36 ,  H03H9/02645 ,  H03H9/02842 ,  H03H9/643

    摘要： A surface acoustic wave reflective array of the kind in which parallel rows of scatterers produce Bragg reflection of an incident wave in a wanted direction at a given frequency determined by the row spacing. The rows (4) are formed of scattering centers, eg metallized dots (11) divisible into unit structures (10) each containing a group of at least two such centers; the orientation and relative spacings (in terms of the Bragg wavelength) of the centers within each unit, relative to the direction (Z) of an incident beam, are such that the scattered waves constructively interfere in the wanted direction (X) while avoiding constructive interference in other directions. The scattering centers of each unit structure may be in the same row or in adjacent rows. The invention alleviates a disadvantage of existing reflective dot arrays, which tend additionally to produce reflections in unwanted directions.

    摘要翻译： 这种类型的表面声波反射阵列，其中平行的散射体行以由行间隔确定的给定频率在期望方向上产生入射波的布拉格反射。 行（4）由散射中心形成，例如可分为单元结构（10）的金属化点（11），每个单元结构（10）包含一组至少两个这样的中心; 相对于入射光束的方向（Z），每个单元内的中心的取向和相对间隔（以布拉格波长为单位）使得散射波在有意的方向（X）上建构性地干扰，同时避免建设性 干扰其他方向。 每个单位结构的散射中心可以在同一行或相邻行中。 本发明减轻了现有的反射点阵列的缺点，其倾向于在不想要的方向上产生反射。

    Surface acoustic wave devices
    96.
    发明授权
    Surface acoustic wave devices 失效
    声表面波器件

    公开(公告)号：US4247835A

    公开(公告)日：1981-01-27

    申请号：US41852

    申请日：1979-05-24

    申请人： Meiron F. Lewis

    发明人： Meiron F. Lewis

    IPC分类号： H03H9/25 ,  G10K11/36 ,  H03H3/08 ,  H03H9/02 ,  H01L41/18 ,  H03H9/42

    CPC分类号： H03H9/02551 ,  G10K11/36

    摘要： A surface acoustic wave device comprises a quartz substrate having a flat surface carrying one or more transducers for launching and receiving surface acoustic waves along a track in the flat surface. In this invention the flat surface lies in a plane rotated about a Y axis by plus or minus 41.degree. to 47.degree. from the Z plane and the track is aligned 61.degree. to 67.degree. from the Y axis.

    摘要翻译： 表面声波装置包括具有平坦表面的石英基板，该平坦表面承载一个或多个换能器，用于沿着平坦表面中的轨道发射和接收表面声波。 在本发明中，平面位于从Z平面绕Y轴旋转正，负41°至47°的平面内，轨道与Y轴对准61°至67°。

    Surface acoustic wave device comprising piezoelectric substrate having zinc oxide layer on .alpha.-alumina layer
    97.
    发明授权
    Surface acoustic wave device comprising piezoelectric substrate having zinc oxide layer on .alpha.-alumina layer 失效
    表面声波装置包括在α-氧化铝层上具有氧化锌层的压电基片

    公开(公告)号：US4236095A

    公开(公告)日：1980-11-25

    申请号：US30906

    申请日：1979-04-17

    申请人： Shusuke Ono ,  Tsuneo Mitsuyu ,  Osamu Yamazaki ,  Kiyotaka Wasa

    发明人： Shusuke Ono ,  Tsuneo Mitsuyu ,  Osamu Yamazaki ,  Kiyotaka Wasa

    IPC分类号： H03H9/145 ,  G10K11/36 ,  H03H3/08 ,  H03H9/25 ,  H01L41/18

    CPC分类号： G10K11/36 ,  H03H3/08

    摘要： A surface acoustic wave device comprising a piezoelectric substrate which comprises an .alpha.-alumina layer as a base region and a zinc oxide layer as a surface region formed on the .alpha.-alumina layer. Preferably the two layers are each made of a single crystal, and the thickness of the zinc oxide layer and an angle between a crystallographic axis of the zinc oxide single crystal and the direction of wave propagation are determined so as to fall within optimum ranges, respectively. This device features an increased phase velocity and an augmented value for the electromechanical coupling coefficient and accordingly is of use at very-high to ultra-high frequencies.

    摘要翻译： 一种表面声波装置，包括压电基片，其包含作为基底区域的α-氧化铝层和形成在所述α-氧化铝层上的表面区域的氧化锌层。 优选地，两层各自由单晶制成，并且氧化锌层的厚度和氧化锌单晶的结晶轴与波传播方向之间的角度分别被确定为在最佳范围内 。 该装置具有增加的相速度和机电耦合系数的增加值，并因此在非常高到超高频率下使用。

    Controlled gap surface acoustic wave device
    100.
    发明授权
    Controlled gap surface acoustic wave device 失效
    可控隙隙声表面波装置

    公开(公告)号：US4058745A

    公开(公告)日：1977-11-15

    申请号：US702570

    申请日：1976-07-06

    申请人： Oberdan W. Otto

    发明人： Oberdan W. Otto

    IPC分类号： G10K11/36 ,  H03F13/00 ,  H01L41/04

    CPC分类号： H03F13/00 ,  G10K11/36 ,  G01N2291/02491

    摘要： A surface acoustic wave device for use as an amplifier or convolver, or the like, and incorporating a plurality of parallel, spaced rails disposed between and separating a semiconductor slab and a surface acoustic wave propagating planar surface of a piezoelectric substrate a relatively small but finite distance apart, the rails having longitudinal axes aligned with the propagation beam path by and between a pair of spaced electro-acoustic transducers disposed on the substrate.

    摘要翻译： 一种用作放大器或卷积器等的表面声波装置，并且包括设置在压电基板的半导体板和表面声波传播平面之间并分离的多个平行的间隔的轨道，其相对较小但有限 距离分开，轨道具有与设置在基板上的一对隔开的电声换能器之间和之间的传播路径对准的纵向轴线。