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    BOUNDARY ACOUSTIC WAVE DEVICE
    1.
    发明申请
    BOUNDARY ACOUSTIC WAVE DEVICE 有权
    边界声波装置

    公开(公告)号：US20100219718A1

    公开(公告)日：2010-09-02

    申请号：US12680774

    申请日：2008-10-21

    申请人： Kazunori Nishimura ,  Hiroyuki Nakamura ,  Hidekazu Nakanishi ,  Ryouichi Takayama ,  Takashi Inoue

    发明人： Kazunori Nishimura ,  Hiroyuki Nakamura ,  Hidekazu Nakanishi ,  Ryouichi Takayama ,  Takashi Inoue

    IPC分类号： H01L41/09 ,  H01L41/04

    CPC分类号： H03H9/0222 ,  H03H9/02574

    摘要： A boundary acoustic wave device includes a first medium layer made of piezoelectric material, a second medium layer provided on the first medium layer, a third medium layer provided on the second medium layer, and an electrode provided at an interface between the second and third medium layers. The electrode drives the third medium layer to generate a transverse wave. A propagation speed of the transverse wave in the third medium layer is lower than a propagation speed of the transverse wave in the first medium layer. A propagation speed of the transverse wave in the second medium layer is lower than the propagation speed of the transverse wave in the first medium layer. This boundary acoustic wave device has a large electro-mechanical coupling coefficient.

    摘要翻译： 弹性边界波装置包括由压电材料制成的第一介质层，设置在第一介质层上的第二介质层，设置在第二介质层上的第三介质层，以及设置在第二介质和第三介质之间的界面处的电极 层。 电极驱动第三介质层产生横波。 第三介质层中的横波的传播速度低于第一介质层中的横波的传播速度。 第二介质层中的横波的传播速度低于第一介质层中的横波的传播速度。 该声界面波装置具有大的机电耦合系数。

    Boundary acoustic wave device
    2.
    发明授权
    Boundary acoustic wave device 有权
    边界声波装置

    公开(公告)号：US08154171B2

    公开(公告)日：2012-04-10

    申请号：US12680774

    申请日：2008-10-21

    申请人： Kazunori Nishimura ,  Hiroyuki Nakamura ,  Hidekazu Nakanishi ,  Ryouichi Takayama ,  Takashi Inoue

    发明人： Kazunori Nishimura ,  Hiroyuki Nakamura ,  Hidekazu Nakanishi ,  Ryouichi Takayama ,  Takashi Inoue

    IPC分类号： H03H9/25

    CPC分类号： H03H9/0222 ,  H03H9/02574

    摘要： A boundary acoustic wave device includes a first medium layer made of piezoelectric material, a second medium layer provided on the first medium layer, a third medium layer provided on the second medium layer, and an electrode provided at an interface between the second and third medium layers. The electrode drives the third medium layer to generate a transverse wave. A propagation speed of the transverse wave in the third medium layer is lower than a propagation speed of the transverse wave in the first medium layer. A propagation speed of the transverse wave in the second medium layer is lower than the propagation speed of the transverse wave in the first medium layer. This boundary acoustic wave device has a large electro-mechanical coupling coefficient.

    摘要翻译： 弹性边界波装置包括由压电材料制成的第一介质层，设置在第一介质层上的第二介质层，设置在第二介质层上的第三介质层，以及设置在第二介质和第三介质之间的界面处的电极 层。 电极驱动第三介质层产生横波。 第三介质层中的横波的传播速度低于第一介质层中的横波的传播速度。 第二介质层中的横波的传播速度低于第一介质层中的横波的传播速度。 该声界面波装置具有大的机电耦合系数。

    Antenna duplexer
    3.
    发明授权
    Antenna duplexer 有权
    天线双工器

    公开(公告)号：US08994472B2

    公开(公告)日：2015-03-31

    申请号：US13353350

    申请日：2012-01-19

    申请人： Toru Yamaji ,  Kazunori Nishimura ,  Joji Fujiwara ,  Hiroyuki Nakamura

    发明人： Toru Yamaji ,  Kazunori Nishimura ,  Joji Fujiwara ,  Hiroyuki Nakamura

    IPC分类号： H03H9/72 ,  H03H9/64 ,  H03H9/145

    CPC分类号： H03H9/725 ,  H01P1/205 ,  H03H9/14535 ,  H03H9/205 ,  H03H9/25 ,  H03H9/6483 ,  H04B1/0057

    摘要： An antenna duplexer includes first and second filters connected to an antenna terminal. The first filter has a passband of a low frequency band. The second filter has a passband of a high frequency band. The second filter is a ladder-type filter including series-arm resonators and parallel-arm resonators. At least one parallel-arm resonator out of the parallel-arm resonators has a main resonance and an auxiliary resonance. Attenuation poles caused by the main resonance and the auxiliary resonance are within the low frequency band. This antenna duplexer has a high attenuation characteristic and a high isolation characteristic while maintaining a low insertion loss.

    摘要翻译： 天线双工器包括连接到天线端子的第一和第二滤波器。 第一滤波器具有低频带的通带。 第二滤波器具有高频带的通带。 第二滤波器是包括串联谐振器和并联臂谐振器的梯形滤波器。 并联臂谐振器中的至少一个并联臂谐振器具有主谐振和辅助谐振。 由主谐振和辅助谐振引起的衰减极在低频带内。 该天线双工器具有高衰减特性和高隔离特性，同时保持低插入损耗。

    Interdigital transducer, surface acoustic wave filter, and radio communication apparatus
    7.
    发明授权
    Interdigital transducer, surface acoustic wave filter, and radio communication apparatus 有权
    叉指式换能器，表面声波滤波器和无线电通信装置

    公开(公告)号：US06870302B2

    公开(公告)日：2005-03-22

    申请号：US10875845

    申请日：2004-06-24

    申请人： Hiroyuki Nakamura ,  Ken Matsunami ,  Kazunori Nishimura

    发明人： Hiroyuki Nakamura ,  Ken Matsunami ,  Kazunori Nishimura

    IPC分类号： H03H9/00 ,  H03H9/145 ,  H03H9/64 ,  H01L41/04 ,  H01L41/08 ,  H01L41/18 ,  H02N2/00

    CPC分类号： H03H9/6426 ,  H03H9/0042 ,  H03H9/14505

    摘要： An interdigital transducer has one-wavelength basic units of a single phase unidirectional transducer a plurality of each having three electrode fingers within one wavelength; and a plurality of one-wavelength basic units of a bidirectional electrode each having four electrode fingers within the one wavelength, wherein the one-wavelength basic units are properly arranged according to a desired filter characteristic, and one of the three electrode fingers of each one-wavelength basic unit of the single phase unidirectional transducer is wider than the two other electrode fingers, and of the four electrode fingers of each one-wavelength basic unit of the bidirectional electrode, one pair of two fingers is interdigitated to the other pair of two fingers, and an adjustment section is provided between the one-wavelength basic units of the single phase unidirectional transducer and the one-wavelength basic units of the bidirectional electrode.

    摘要翻译： 叉指式换能器具有单相单向换能器的单波长基本单元，其中多个具有一个波长内的三个电极指; 以及在一个波长内具有四个电极指的双向电极的多个单波长基本单元，其中所述单波长基本单元根据期望的滤波器特性适当地布置，并且每个波长的三个电极指的一个 单相单向换能器的基本单元比两个其他电极指以及双向电极的每个单波长基本单元的四个电极指的宽，一对两个指与另一对两个指相交， 在单相单向换能器的单波长基本单元和双向电极的单波长基本单元之间设置有调节部。

    Interdigital transducer, surface acoustic wave filter, and radio communication apparatus
    8.
    发明授权
    Interdigital transducer, surface acoustic wave filter, and radio communication apparatus 有权
    叉指式换能器，表面声波滤波器和无线电通信装置

    公开(公告)号：US06806619B2

    公开(公告)日：2004-10-19

    申请号：US10271269

    申请日：2002-10-15

    申请人： Hiroyuki Nakamura ,  Ken Matsunami ,  Kazunori Nishimura

    发明人： Hiroyuki Nakamura ,  Ken Matsunami ,  Kazunori Nishimura

    IPC分类号： H01L4104

    CPC分类号： H03H9/6426 ,  H03H9/0042 ,  H03H9/14505

    摘要： An interdigital transducer has one-wavelength basic units of a single phase unidirectional transducer a plurality of each having three electrode fingers within one wavelength; and a plurality of one-wavelength basic units of a bidirectional electrode each having four electrode fingers within the one wavelength, wherein the one-wavelength basic units are properly arranged according to a desired filter characteristic, and one of the three electrode fingers of each one-wavelength basic unit of the single phase unidirectional transducer is wider than the two other electrode fingers, and of the four electrode fingers of each one-wavelength basic unit of the bidirectional electrode, one pair of two fingers is interdigitated to the other pair of two fingers, and an adjustment section is provided between the one-wavelength basic units of the single phase unidirectional transducer and the one-wavelength basic units of the bidirectional electrode.

    摘要翻译： 叉指式换能器具有单相单向换能器的单波长基本单元，其中多个具有一个波长内的三个电极指; 以及在一个波长内具有四个电极指的双向电极的多个单波长基本单元，其中所述单波长基本单元根据期望的滤波器特性适当地布置，并且每个波长的三个电极指的一个 单相单向换能器的基本单元比两个其他电极指以及双向电极的每个单波长基本单元的四个电极指的宽，一对两个指与另一对两个指相交， 在单相单向换能器的单波长基本单元和双向电极的单波长基本单元之间设置有调节部。

    Surface acoustic wave filter
    9.
    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 filter and multistage surface acoustic wave filter
    10.
    发明授权
    Surface acoustic wave filter and multistage surface acoustic wave filter 有权
    表面声波滤波器和多级表面声波滤波器

    公开(公告)号：US06351196B1

    公开(公告)日：2002-02-26

    申请号：US09390653

    申请日：1999-09-07

    申请人： Hiroyuki Nakamura ,  Toru Yamada ,  Kazunori Nishimura ,  Toshio Ishizaki

    发明人： Hiroyuki Nakamura ,  Toru Yamada ,  Kazunori Nishimura ,  Toshio Ishizaki

    IPC分类号： H03H964

    CPC分类号： H03H9/6443 ,  H03H9/0028 ,  H03H9/02763 ,  H03H9/02913 ,  H03H9/02992 ,  H03H9/14588 ,  H03H9/14597 ,  H03H9/6463 ,  H03H9/6479

    摘要： Disclosed is a surface acoustic wave filter on a piezoelectric substrate. The filter includes at least two surface acoustic wave resonators that each has a reflector electrode on both sides of an IDT electrode as an inter-digital transducer electrode. At least two of the resonators are disposed on a piezoelectric substrate in positions near each other so that the propagation direction of surface acoustic waves are in parallel to make an acoustic coupling. In an embodiment, the acoustic coupling is a direct coupling. The IDT electrode has a plurality of electrode fingers connected so as not to cancel respective electric charges. The IDT electrode is constituted by at least three divisional IDT electrodes. A pair of the electrode fingers can have a reverse phase relation with respect to each other. Also, in a multi-stage surface acoustic wave filter, the electrode fingers can be included in an upper IDT electrode of a top stage of the filter, and in a lower IDT electrode of a bottom stage of such filter.

    摘要翻译： 公开了压电基板上的表面声波滤波器。 滤波器包括至少两个表面声波谐振器，每个表面声波谐振器在IDT电极的两侧上具有作为数字间换能器电极的反射器电极。 至少两个谐振器在彼此相邻的位置处设置在压电基板上，使得声表面波的传播方向平行以形成声耦合。 在一个实施例中，声耦合是直接耦合。 IDT电极具有连接成不抵消各自的电荷的多个电极指。 IDT电极由至少三个分开的IDT电极构成。 一对电极指可以相对于彼此具有反相位关系。 此外，在多级表面声波滤波器中，电极指可以包括在过滤器的顶级的上部IDT电极中，并且可以包括在该过滤器的底部的下部IDT电极中。