Surface acoustic device
    6.
    发明授权
    Surface acoustic device 失效
    表面声学装置

    公开(公告)号:US07221074B2

    公开(公告)日:2007-05-22

    申请号:US10989549

    申请日:2004-11-17

    IPC分类号: H01L41/08

    摘要: A surface acoustic wave device includes a piezoelectric substrate, a first and a second interdigital transducers (IDTs) provided on the piezoelectric substrate. The first IDT includes multiple tracks having different frequency characteristics that are connected in parallel. The second IDT includes a normalized electrode pattern. The frequency characteristic of the multiple tracks is asymmetric to a center frequency of the SAW filter, substantially flat in a passband when those of the multiple tracks are overlapped, or complementary in the passband. Thus, it is possible to provide the surface acoustic wave device having a high damping property.

    摘要翻译: 表面声波装置包括压电基片,设置在压电基片上的第一和第二叉指式换能器(IDT)。 第一IDT包括并行连接的具有不同频率特性的多个轨迹。 第二IDT包括归一化电极图案。 多个磁道的频率特性与SAW滤波器的中心频率不对称,当多个磁道的频率在通带中重叠或互补时,通带中的基本平坦。 因此,可以提供具有高阻尼特性的表面声波装置。

    Surface acoustic device
    8.
    发明申请
    Surface acoustic device 失效
    表面声学装置

    公开(公告)号:US20050121998A1

    公开(公告)日:2005-06-09

    申请号:US10989549

    申请日:2004-11-17

    摘要: A surface acoustic wave device includes a piezoelectric substrate, a first and a second interdigital transducers (IDTs) provided on the piezoelectric substrate. The first IDT includes multiple tracks having different frequency characteristics that are connected in parallel. The second IDT includes a normalized electrode pattern. The frequency characteristic of the multiple tracks is asymmetric to a center frequency of the SAW filter, substantially flat in a passband when those of the multiple tracks are overlapped, or complementary in the passband. Thus, it is possible to provide the surface acoustic wave device having a high damping property.

    摘要翻译: 表面声波装置包括压电基片,设置在压电基片上的第一和第二叉指式换能器(IDT)。 第一IDT包括并行连接的具有不同频率特性的多个轨迹。 第二IDT包括归一化电极图案。 多个磁道的频率特性与SAW滤波器的中心频率不对称,当多个磁道的频率在通带中重叠或互补时,通带中的基本平坦。 因此,可以提供具有高阻尼特性的表面声波装置。