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20 条记录 (耗时 0.023 秒)

    Surface acoustic wave filter
    7.
    发明授权
    Surface acoustic wave filter 有权
    表面声波滤波器

    公开(公告)号：US06476691B1

    公开(公告)日：2002-11-05

    申请号：US09762025

    申请日：2001-04-06

    申请人： Shigeru Tsuzuki ,  Tsutomu Igaki ,  Ken Matsunami ,  Kazunori Nishimura ,  Hiroyuki Nakamura ,  Toru Yamada

    发明人： Shigeru Tsuzuki ,  Tsutomu Igaki ,  Ken Matsunami ,  Kazunori Nishimura ,  Hiroyuki Nakamura ,  Toru Yamada

    IPC分类号： H03H964

    CPC分类号： H03H9/6433 ,  H03H9/0076 ,  H03H9/02637 ,  H03H9/14505 ,  H03H9/14529 ,  H03H9/14538 ,  H03H9/14552

    摘要： A SAW filter comprising a piezoelectric substrate and at least two filter tracks formed on the substrate, each having at least two IDT electrodes for input and output. The two filter tracks have substantially the same phase within a pass band, while it is substantially inverse-phased outside the pass band. For realizing the above-described conditions, input IDT electrode of one filter track is connected in parallel with input IDT electrode of the other filter track, while output IDT electrode of one filter track is connected in parallel with output IDT electrode of the other filter track. Furthermore, frequency values of said two filter tracks substantially coincide at a point 3 dB lower from the peak transfer function value. Thus the above-configured SAW filter of the present invention is smaller in the overall size and offers a broad pass band and a steep attenuation characteristic.

    摘要翻译： 一种SAW滤波器，包括压电衬底和形成在衬底上的至少两个滤波器轨道，每个滤波器轨道具有用于输入和输出的至少两个IDT电极。 两个滤波器轨道在通带内具有基本上相同的相位，而在通带外部基本上是反相的。 为了实现上述条件，一个滤波器轨道的输入IDT电极并联连接到另一滤波器轨道的输入IDT电极，而一个滤波器轨道的输出IDT电极与另一滤波器轨迹的输出IDT电极并联连接 。 此外，所述两个滤波器轨道的频率值基本上与从峰值传递函数值降低3dB的点相重合。 因此，本发明的上述配置的SAW滤波器的总体尺寸较小，并且具有宽的通带和陡峭的衰减特性。

    Surface acoustic wave device
    8.
    发明授权
    Surface acoustic wave device 有权
    表面声波装置

    公开(公告)号：US07019435B2

    公开(公告)日：2006-03-28

    申请号：US10812026

    申请日：2004-03-30

    申请人： Shinobu Nakaya ,  Hiroyuki Nakamura ,  Shigeru Tsuzuki

    发明人： Shinobu Nakaya ,  Hiroyuki Nakamura ,  Shigeru Tsuzuki

    IPC分类号： H03H9/64 ,  H03H9/145

    CPC分类号： H03H9/6433 ,  H03H9/0038 ,  H03H9/0071 ,  H03H9/02685 ,  H03H9/14588 ,  H03H9/643 ,  H03H9/6469 ,  H03H9/6473

    摘要： In a SAW device containing two or more longitudinal mode coupling type SAW elements connected in parallel, each SAW element includes at least three comb shaped electrode pairs and a reflector electrode provided at both sides of the comb shaped electrodes. One part of respective comb shaped electrode pairs forming IDT electrodes is connected together in common by a ground connection electrode and connected with a ground pad. This configuration enables the number of connection pads to be minimized, thus providing a SAW device that is small in size and superior in filter characteristics.

    摘要翻译： 在包含并联连接的两个或更多个纵向耦合型SAW元件的SAW器件中，每个SAW元件包括至少三个梳状电极对和设置在梳状电极两侧的反射器电极。 形成IDT电极的各个梳状电极对的一部分共同地由接地连接电极连接在一起，并与接地垫连接。 这种配置使连接焊盘的数量最小化，从而提供尺寸小且滤波器特性优异的SAW器件。

    Surface acoustic wave filter and communication apparatus with the same
    9.
    发明授权
    Surface acoustic wave filter and communication apparatus with the same 有权
    表面声波滤波器和通信装置相同

    公开(公告)号：US06650206B2

    公开(公告)日：2003-11-18

    申请号：US09951658

    申请日：2001-09-13

    申请人： Hiroyuki Nakamura ,  Toru Yamada ,  Shigeru Tsuzuki ,  Kazunori Nishimura

    发明人： Hiroyuki Nakamura ,  Toru Yamada ,  Shigeru Tsuzuki ,  Kazunori Nishimura

    IPC分类号： H03H964

    CPC分类号： H03H9/6426

    摘要： A surface acoustic wave filter, has: a piezoelectric substrate; and a at least two filter tracks having at least an input interdigital transducer electrode and an output interdigital transducer electrode provided on said piezoelectric substrate, wherein the respective input interdigital transducer electrodes of said at least two filter tracks are brought into connection in parallel; the respective output interdigital transducer electrodes of said at least two filter tracks are brought into connection in parallel, and overlapping widths of electrode fingers of said input interdigital transducer electrode and output interdigital transducer electrode are different from each other for each of said at least two filter tracks.

    摘要翻译： 一种表面声波滤波器，具有：压电基板; 以及至少两个滤波器轨道，其至少具有设置在所述压电基板上的输入叉指换能器电极和输出叉指式换能器电极，其中所述至少两个滤波器轨道的相应输入叉指式换能器电极并联连接;相应的输出 所述至少两个滤波器轨道的叉指换能器电极并联连接，并且所述输入叉指换能器电极和输出叉指式换能器电极的电极指的重叠宽度对于所述至少两个滤波器轨道中的每一个彼此不同。

    Surface acoustic wave filter, balanced type filter and communication device
    10.
    发明授权
    Surface acoustic wave filter, balanced type filter and communication device 有权
    表面声波滤波器，平衡型滤波器和通信装置

    公开(公告)号：US06891450B2

    公开(公告)日：2005-05-10

    申请号：US10160411

    申请日：2002-05-30

    申请人： Hiroyuki Nakamura ,  Narihiro Mita ,  Shigeru Tsuzuki ,  Toru Yamada

    发明人： Hiroyuki Nakamura ,  Narihiro Mita ,  Shigeru Tsuzuki ,  Toru Yamada

    IPC分类号： H03H9/00 ,  H03H9/64 ,  H03H9/72

    CPC分类号： H03H9/0042 ,  H03H9/0038 ,  H03H9/0061 ,  H03H9/02952 ,  H03H9/14588

    摘要： A longitudinal mode type surface acoustic wave filter comprising a first IDT electrode, second and third IDT electrodes, and first and second reflector electrodes are formed on a piezoelectric substrate. The upper electrode of the first IDT electrode is connected to one of balanced type terminals, and the lower electrode of the first IDT electrode is connected to the other balanced type terminal. Also, the lower electrode of the second IDT electrode is connected to an unbalanced type terminal, and the lower electrode is grounded. The lower electrode of the third IDT electrode is connected to the unbalanced type terminal, and the upper electrode is grounded.

    摘要翻译： 包括第一IDT电极，第二和第三IDT电极以及第一和第二反射器电极的纵向模式型表面声波滤波器形成在压电基板上。 第一IDT电极的上部电极与平衡型端子中的一个连接，第一IDT电极的下部电极与另一个平衡型端子连接。 此外，第二IDT电极的下电极连接到不平衡型端子，下电极接地。 第三IDT电极的下部电极与不平衡型端子连接，上部电极接地。