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    Method for the correction of a surface wave device, especially for a reflective array compressor
    2.
    发明授权
    Method for the correction of a surface wave device, especially for a reflective array compressor 失效
    用于校正表面波装置的方法，特别是用于反射阵列压缩机的方法

    公开(公告)号：US4916416A

    公开(公告)日：1990-04-10

    申请号：US167714

    申请日：1988-03-14

    申请人： Jean Desbois

    发明人： Jean Desbois

    IPC分类号： H03H9/44 ,  H03H3/08 ,  H03H9/64

    CPC分类号： H03H9/44 ,  H03H9/02811

    摘要： A method for the correction of surface wave devices consists of measuring the transfer function of an entirely finished surface wave device and then designing a surface wave corrective filter, the transfer function of which enables the correction of the transfer function of the preceding device. The method makes it possible to correct, in particular, RAC type dispersive filters.

    摘要翻译： 用于校正表面波器件的方法包括测量完整表面波器件的传递函数，然后设计表面波校正滤波器，其传递函数能够校正前一器件的传递函数。 该方法可以特别校正RAC型分散滤波器。

    Reflective array surface acoustic wave device
    3.
    发明授权
    Reflective array surface acoustic wave device 失效
    反射阵列表面声波装置

    公开(公告)号：US4745321A

    公开(公告)日：1988-05-17

    申请号：US16526

    申请日：1987-02-18

    申请人： Curt R. Raschke

    发明人： Curt R. Raschke

    IPC分类号： G01S13/28 ,  H03H9/02 ,  H03H9/44 ,  H01L41/08

    CPC分类号： H03H9/44 ,  G01S13/282 ,  H03H9/02653 ,  H03H9/02811

    摘要： A reflective array surface acoustic wave signal compressor or expander (RAC) has a piezoelectric substrate (LiNbO.sub.3) upon which is deposited an input transducer and an output transducer and etched therein a reflective grating. The RAC grating comprises reflective elements which includes a plurality of grooves having either uniform depths and lengths and preselected widths or uniform depths, lengths and widths for producing a flat pass band or a desired frequency characteristic. Yields are increased owing to the simplified fabrication process and costs decreased owing to batch fabrication made possible by the resulting simplified fabrication-process.

    摘要翻译： 反射阵列表面声波信号压缩机或扩展器（RAC）具有压电基板（LiNbO 3），在其上沉积输入换能器和输出换能器并在其中蚀刻反射光栅。 RAC光栅包括反射元件，其包括具有均匀深度和长度以及预选宽度或均匀深度，长度和宽度的多个凹槽，用于产生平坦通带或期望的频率特性。 由于简化的制造工艺，产量增加，并且由于通过最终的简化制造工艺使成批制造成本降低了成本。

    Surface wave devices
    4.
    发明授权
    Surface wave devices 失效
    表面波器件

    公开(公告)号：US3883831A

    公开(公告)日：1975-05-13

    申请号：US40146173

    申请日：1973-09-27

    申请人： MASSACHUSETTS INST TECHNOLOGY

    发明人： WILLIAMSON RICHARD C ,  STERN ERNEST

    IPC分类号： H03H9/02 ,  H03H9/42 ,  H03H9/44 ,  H03H9/64 ,  H03H9/72 ,  H03H9/76 ,  H03H9/26 ,  H01V7/00 ,  H03H9/30

    CPC分类号： H03H9/6489 ,  H03H9/02771 ,  H03H9/02795 ,  H03H9/02811 ,  H03H9/44

    摘要： A device for handling surface elastic waves using a plurality of reflective elements, such as grooves, on the surface thereof the dimensional characteristics of which may be arranged to vary in a predetermined manner from element to element to provide a bandpass filtering action on a surface wave reflected therefrom. The device may be formed in various configurations using single or double reflections to provide single or multiple filtering action or phase coded filter action and the orientation of the reflective elements may be varied to vary the center frequency of the filter. A further embodiment uses a compensating strip of material positioned in the propagating path of a surface wave, the dimensional characteristics of such strip being arranged to vary so as to change the velocity of the wave and to achieve phase error compensation thereby. Further, a strip of energy absorbing material may also be used to control the amplitude response of the filter.

    摘要翻译： 一种用于使用多个反射元件（例如凹槽）来处理表面弹性波的装置，其表面上的尺寸特性可以被布置为以预定的方式从元件到元件变化以在表面波上提供带通滤波作用 从其反射。 可以使用单反射或双反射形成各种配置以提供单次或多次滤波作用或相位编码的滤波器作用，并且可以改变反射元件的取向以改变滤光器的中心频率。 另一实施例使用位于表面波的传播路径中的补偿材料条，这种条的尺寸特征被布置为改变以改变波的速度并由此实现相位误差补偿。 而且，能量吸收材料条也可用于控制过滤器的振幅响应。