利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

4 条记录 (耗时 0.021 秒)

    Saw device
    1.
    发明授权
    Saw device 失效
    锯装置

    公开(公告)号：US4775814A

    公开(公告)日：1988-10-04

    申请号：US051523

    申请日：1987-05-19

    申请人： Akitsuna Yuhara ,  Jun Sasaki ,  Tetsuya Hirashima ,  Jun Yamada

    发明人： Akitsuna Yuhara ,  Jun Sasaki ,  Tetsuya Hirashima ,  Jun Yamada

    IPC分类号： H03H3/08 ,  H03H9/02 ,  H03H9/145 ,  H01L41/08

    CPC分类号： H03H3/08 ,  H03H9/02929 ,  H03H9/14541

    摘要： In a SAW device comprising a piezoelectric substrate and at least one set of metallic electrodes formed on the piezoelectric substrate, at least one set of the electrodes have a laminated structure comprised of a layer of an aluminum film added with an impurity at a concentration of 6 wt. % or less and another layer of a film of pure aluminum or aluminum added with an impurity at a concentration of 0.4 wt. % or less. The SAW device having the laminated structure of electrodes can handle high frequency electric signals of higher power and/or larger amplitudes.

    摘要翻译： 在包括压电基板和形成在压电基板上的至少一组金属电极的SAW器件中，至少一组电极具有层叠结构，该叠层结构由添加有浓度为6的杂质的铝膜层 重量 ％以下的另一层，添加浓度为0.4重量％的杂质的纯铝或铝的另一层。 ％ 或更少。 具有电极层叠结构的SAW器件可以处理更高功率和/或更大幅度的高频电信号。

    Surface acoustic wave filter
    2.
    发明授权
    Surface acoustic wave filter 失效
    表面声波滤波器

    公开(公告)号：US4939487A

    公开(公告)日：1990-07-03

    申请号：US219250

    申请日：1988-07-15

    申请人： Akitsuna Yuhara ,  Hitoshi Watanabe ,  Jun Yamada ,  Tetsuya Hirashima

    发明人： Akitsuna Yuhara ,  Hitoshi Watanabe ,  Jun Yamada ,  Tetsuya Hirashima

    IPC分类号： H03H3/08 ,  H03H9/145 ,  H03H9/64

    CPC分类号： H03H9/6426 ,  H03H9/1455

    摘要： When SAW filter is used as a receiving filter of an antenna duplexer filter in a cellular radio equipment, since a transmitting signal of an out-band frequency has a large power for the SAW filter, the large power can leak into the SAW filter to generate inter-modulation disturbances in the SAW filter. Since the inter-modulation disturbances are generated when the transmission power density of the surface acoustic wave is made too large, input converters are divided, and the divided converters are disposed in the direction perpendicular to the propagation direction of the surface acoustic wave to lower the transmission power density. Since the divided converters are connected in series, reduction in the impedence together with increase of the aperture length can be compensated.

    摘要翻译： 当在蜂窝无线电设备中使用SAW滤波器作为天线双工器滤波器的接收滤波器时，由于带外频率的发射信号对SAW滤波器具有较大的功率，因此大功率可能泄漏到SAW滤波器中以产生 SAW滤波器中的互调扰动。 由于当声表面波的发射功率密度变得太大时产生互调扰乱，所以输入转换器被分割，并且分离的转换器被设置在与声表面波的传播方向垂直的方向上，以降低 传输功率密度。 由于分频转换器串联连接，可以补偿阻抗的减小以及孔径长度的增加。