公开(公告)号：US06809614B2

公开(公告)日：2004-10-26

申请号：US10327052

申请日：2002-12-24

申请人： Yasuhisa Fujii ,  Minefumi Ouchi ,  Masaru Yata

发明人： Yasuhisa Fujii ,  Minefumi Ouchi ,  Masaru Yata

IPC分类号： H03H964

CPC分类号： H03H9/0071 ,  H03H9/0085 ,  H03H9/14582

摘要： A surface acoustic wave device includes a first surface acoustic wave filter including at least two interdigital transducer IDTs arranged along a surface acoustic wave propagation direction on a piezoelectric substrate, and a second surface acoustic wave filter including at least two interdigital transducer IDTs arranged along the surface acoustic wave propagation direction on a piezoelectric substrate. The input terminals of the first and second surface acoustic wave filters are electrically connected to each other and to an unbalanced signal terminal via a common connection point. The output terminals of the surface acoustic wave filters are connected to balanced signal terminals, respectively. A delay line is introduced between the common connection point and the first surface acoustic wave filter on the piezoelectric substrate.

摘要翻译： 表面声波装置包括：第一表面声波滤波器，包括沿着压电基板上的表面声波传播方向布置的至少两个叉指式换能器IDT，以及包括沿着表面布置的至少两个叉指式换能器IDT的第二声表面波滤波器 压电基片上的声波传播方向。 第一和第二声表面波滤波器的输入端经由公共连接点彼此电连接到不平衡信号端子。 声表面波滤波器的输出端分别连接到平衡信号端子。 在公共连接点和压电基板上的第一声表面波滤波器之间引入延迟线。

公开(公告)号：US06771145B2

公开(公告)日：2004-08-03

申请号：US10230038

申请日：2002-08-29

申请人： Minefumi Ouchi ,  Masaru Yata

发明人： Minefumi Ouchi ,  Masaru Yata

IPC分类号： H03H900

CPC分类号： H03H9/6436 ,  H03H9/0038 ,  H03H9/0071 ,  H03H9/008 ,  H03H9/0085 ,  H03H9/14582

摘要： A longitudinally coupled resonator type surface acoustic wave element including three interdigital electrode portions is disposed on a piezoelectric substrate. The surface acoustic wave device is constructed so that balance-unbalance conversion can be carried out by using two surface acoustic wave elements, and the input/output impedances are different from each other by about four times. The interdigital pitches in the surface acoustic wave elements are set so as to be different from each other. Alternatively, one-terminal-pair surface acoustic wave resonators are connected in series with at least ones of the input and output sides of the surface acoustic wave elements, the interdigital electrode finger pitches of the one-terminal-pair surface acoustic wave resonators provided on the right and left sides are set to be different from each other.

摘要翻译： 包括三个交指电极部分的纵向耦合谐振器型表面声波元件设置在压电基片上。 声表面波装置的构造使得可以通过使用两个表面声波元件进行平衡不平衡转换，并且输入/输出阻抗彼此相差约四倍。 表面声波元件中的叉指间距被设定为彼此不同。 或者，单端对声表面波谐振器与表面声波元件的输入和输出侧的至少一个串联连接，设置在单端对声表面波谐振器的叉指电极指间距 右侧和左侧设置为彼此不同。

公开(公告)号：US07746199B2

公开(公告)日：2010-06-29

申请号：US12428715

申请日：2009-04-23

申请人： Minefumi Ouchi

发明人： Minefumi Ouchi

IPC分类号： H03H9/64

CPC分类号： H03H9/6469 ,  H03H9/0057 ,  H03H9/0061 ,  H03H9/0085 ,  H03H9/0222 ,  H03H9/14588 ,  H03H9/6433

摘要： An acoustic wave device includes first and second 3-IDT acoustic wave filters provided on a piezoelectric substrate. A second IDT in the first acoustic wave filter is electrically connected to a second IDT in the second acoustic wave filter and a third IDT in the first acoustic wave filter is electrically connected to a third IDT in the second acoustic wave filter to cascade the first acoustic wave filter with the second acoustic wave filter. An acoustic wave resonator is connected to a first IDT in the first acoustic wave filter. In the acoustic wave device, NA/NB is in a range from about 2.6 to about 3.5 and fB/fa is in a range from about 0.995 to about 1.010.

摘要翻译： 声波装置包括设置在压电基板上的第一和第二3-IDT声波滤波器。 第一声​​波滤波器中的第二IDT电连接到第二声波滤波器中的第二IDT，并且第一声波滤波器中的第三IDT与第二声波滤波器中的第三IDT电连接以级联第一声学 滤波器与第二声波滤波器。 声波谐振器连接到第一声波滤波器中的第一IDT。 在声波装置中，NA / NB在约2.6至约3.5的范围内，fB / fa在约0.995至约1.010的范围内。

公开(公告)号：US06876275B2

公开(公告)日：2005-04-05

申请号：US10438342

申请日：2003-05-15

申请人： Minefumi Ouchi

发明人： Minefumi Ouchi

IPC分类号： H03H9/145 ,  H03H9/00 ,  H03H9/25 ,  H03H9/64

CPC分类号： H03H9/0061 ,  H03H9/0038 ,  H03H9/0071 ,  H03H9/14582 ,  H03H9/14588

摘要： A surface acoustic wave device includes a plurality of interdigital electrode portions provided so as to have a balanced-unbalanced conversion function. A ratio N2/N1 is the range of about 50% to about 70%, where N1 represents the total number of electrode fingers of an interdigital electrode portion connected on a balanced signal terminal side, and N2 represents the total number of electrode fingers of the interdigital electrode portion connected on the unbalanced signal side, and the meshing width (W) of the interdigital electrode portions is in the range of about 43 λ to about 58 λ in which λ is the wavelength of a surface acoustic wave.

摘要翻译： 表面声波装置包括设置成具有平衡不平衡转换功能的多个叉指电极部分。 比率N2 / N1为约50％至约70％的范围，其中N1表示连接在平衡信号端子侧的交叉指状电极部分的电极指的总数，N2表示电极指的总数 连接在不平衡信号侧的叉指电极部分，并且叉指电极部分的啮合宽度（W）在约43λ至约58λ的范围内，其中λ是表面声波的波长。

公开(公告)号：US06781485B2

公开(公告)日：2004-08-24

申请号：US10230061

申请日：2002-08-29

申请人： Yuichi Takamine ,  Minefumi Ouchi

发明人： Yuichi Takamine ,  Minefumi Ouchi

IPC分类号： H03H900

CPC分类号： H03H9/0071 ,  H03H9/0038 ,  H03H9/0042 ,  H03H9/0061 ,  H03H9/0085 ,  H03H9/14582 ,  H03H9/14588

摘要： A surface acoustic wave filter unit having three interdigital transducers arranged along the surface acoustic wave propagation direction is disposed on a piezoelectric substrate. An unbalanced signal terminal and balanced signal terminals are provided for the surface acoustic wave filter unit. At least one of the three interdigital transducers is out of phase relative to the other interdigital transducers. Reflectors are arranged so as to sandwich the three interdigital transducers therebetween. The reflectors are grounded. Thus, a surface acoustic wave filter having a balance-to-unbalance conversion function and having high balance between the balanced signal terminals is achieved.

摘要翻译： 具有沿声表面波传播方向布置的三个叉指式换能器的表面声波滤波器单元设置在压电基板上。 为声表面波滤波器单元提供不平衡信号端子和平衡信号端子。 三个叉指式换能器中的至少一个相对于其他叉指式换能器是异相的。 反射器布置成夹在其间的三个叉指换能器。 反射器接地。 因此，实现了具有平衡 - 不平衡转换功能并且在平衡信号端子之间具有高平衡的表面声波滤波器。

公开(公告)号：US07439827B2

公开(公告)日：2008-10-21

申请号：US11773592

申请日：2007-07-05

申请人： Minefumi Ouchi

发明人： Minefumi Ouchi

IPC分类号： H03H9/64

CPC分类号： H03H9/0038 ,  H03H9/0057 ,  H03H9/14579 ,  H03H9/14588

摘要： A longitudinally-coupled-resonator surface acoustic wave filter device has a sufficient pass-band width, in which a large attenuation in a stop band near the low-frequency side of a pass band and sharp filter characteristics, and low insertion loss in the pass band are achieved. The filter device is a five-IDT longitudinally-coupled-resonator acoustic wave filter device including a first IDT, second and third IDTs arranged on either side of the first IDT in a direction of propagation of surface waves, and fourth and fifth outermost IDTs in the direction of propagation of surface waves, wherein when the first IDT has the number of electrode fingers N1 and an electrode finger pitch P1, the second and third IDTs have the number of electrode fingers N2 and an electrode finger pitch P2, and the fourth and fifth IDTs have the number of electrode fingers N3 and an electrode finger pitch P3, a relationship of N1

摘要翻译： 纵向耦合谐振器表面声波滤波器装置具有足够的通带宽度，其中在通带的低频侧附近的阻带中具有大的衰减和尖锐的滤波器特性以及通过中的低插入损耗 乐队已经实现。 滤波器装置是五IDT纵向耦合谐振器的声波滤波器装置，其包括布置在第一IDT的任一侧的表面波传播方向上的第一IDT，第二和第三IDT，以及第四和第五最外层IDT 表面波的传播方向，其中当第一IDT具有电极指N 1和电极指间距P 1的数量时，第二和第三IDT具有电极指数N 2和电极指间距P 2， 并且第四和第五IDT具有电极指N 3和电极指间距P 3的数量，N 1

公开(公告)号：US07034639B2

公开(公告)日：2006-04-25

申请号：US10832870

申请日：2004-04-27

申请人： Yuichi Takamine ,  Yoichi Sawada ,  Minefumi Ouchi

发明人： Yuichi Takamine ,  Yoichi Sawada ,  Minefumi Ouchi

IPC分类号： H03H9/64 ,  H03H9/72

CPC分类号： H03H9/0061 ,  H03H9/0042 ,  H03H9/0057 ,  H03H9/0085 ,  H03H9/14582 ,  H03H9/14588

摘要： A longitudinally coupled resonator type surface acoustic wave filter having a balance-unbalance conversion function achieves improved amplitude balance and phase balance. The surface acoustic wave filter includes first, second and third IDTs. The second IDT is positioned in the center of the three IDTs and has an even number of electrode fingers. The polarity of the electrode finger of the first IDT adjacent to the second IDT is opposite to the polarity of the electrode finger of the third IDT adjacent to the second IDT.

摘要翻译： 具有平衡不平衡转换功能的纵向耦合谐振器型表面声波滤波器实现了改善的幅度平衡和相位平衡。 表面声波滤波器包括第一，第二和第三IDT。 第二IDT位于三个IDT的中心，并且具有偶数个电极指。 与第二IDT相邻的第一IDT的电极指的极性与与第二IDT相邻的第三IDT的电极指的极性相反。

公开(公告)号：US20090201105A1

公开(公告)日：2009-08-13

申请号：US12428715

申请日：2009-04-23

申请人： Minefumi Ouchi

发明人： Minefumi Ouchi

IPC分类号： H03H9/46

CPC分类号： H03H9/6469 ,  H03H9/0057 ,  H03H9/0061 ,  H03H9/0085 ,  H03H9/0222 ,  H03H9/14588 ,  H03H9/6433

摘要： An acoustic wave device includes first and second 3-IDT acoustic wave filters provided on a piezoelectric substrate. A second IDT in the first acoustic wave filter is electrically connected to a second IDT in the second acoustic wave filter and a third IDT in the first acoustic wave filter is electrically connected to a third IDT in the second acoustic wave filter to cascade the first acoustic wave filter with the second acoustic wave filter. An acoustic wave resonator is connected to a first IDT in the first acoustic wave filter. In the acoustic wave device, NA/NB is in a range from about 2.6 to about 3.5 and fB/fa is in a range from about 0.995 to about 1.010, where NA denotes the number of electrode fingers of the first IDT in the first acoustic wave filter, NB denotes the number of electrode fingers of each of the second and third IDTs in the first acoustic wave filter, fB denotes the end frequency of a stop band of each of reflectors in the first and second acoustic wave filters, and fa denotes an anti-resonant frequency of the acoustic wave resonator.

摘要翻译： 声波装置包括设置在压电基板上的第一和第二3-IDT声波滤波器。 第一声​​波滤波器中的第二IDT电连接到第二声波滤波器中的第二IDT，并且第一声波滤波器中的第三IDT与第二声波滤波器中的第三IDT电连接以级联第一声学 滤波器与第二声波滤波器。 声波谐振器连接到第一声波滤波器中的第一IDT。 在声波装置中，NA / NB在约2.6至约3.5的范围内，并且fB / fa在约0.995至约1.010的范围内，其中NA表示第一声学中第一IDT的电极指的数量 波形滤波器，NB表示第一声波滤波器中的第二和第三IDT中的每一个的电极指的数量，fB表示第一和第二声波滤波器中每个反射器的阻带的结束频率，fa表示 声波谐振器的反谐振频率。

公开(公告)号：US07005948B2

公开(公告)日：2006-02-28

申请号：US10774632

申请日：2004-02-10

申请人： Minefumi Ouchi ,  Norihiko Nakahashi

发明人： Minefumi Ouchi ,  Norihiko Nakahashi

IPC分类号： H03H9/64 ,  H03H9/72

CPC分类号： H03H9/0061 ,  H03H9/0057 ,  H03H9/0085 ,  H03H9/14582 ,  H03H9/14588

摘要： A surface acoustic wave device includes first stage longitudinally coupled resonator type surface acoustic wave elements and second stage longitudinally coupled resonator type surface acoustic wave elements that are cascaded to each other and are arranged on a piezoelectric substrate. Each of the first and second stage longitudinally coupled resonator type surface acoustic wave elements is provided with at least three IDTs arranged along the direction of transmission of a surface acoustic wave. The central IDT of each of the longitudinally coupled resonator type surface acoustic wave elements includes narrow pitch electrode finger portions. At least one of the number and the pitch of the electrode fingers of the narrow pitch electrode finger portions of the first stage longitudinally coupled resonator type surface acoustic wave elements is set to be different from that of the second stage longitudinally coupled resonator type surface acoustic wave elements.

摘要翻译： 表面声波装置包括彼此级联并布置在压电基板上的第一级纵向耦合谐振器型表面声波元件和第二级纵向耦合谐振器型表面声波元件。 第一级和第二级纵向耦合谐振器型表面声波元件中的每一个设置有沿着声表面波的透射方向布置的至少三个IDT。 纵向耦合谐振器型声表面波元件的中心IDT包括窄间距电极指部。 第一级纵向耦合谐振器型声表面波元件的窄间距电极指部分的电极指的数量和间距中的至少一个被设置为与第二级纵向耦合的谐振器型表面声波 元素。

公开(公告)号：US06781478B2

公开(公告)日：2004-08-24

申请号：US09886083

申请日：2001-06-21

申请人： Yuichi Takamine ,  Yoichi Sawada ,  Minefumi Ouchi

发明人： Yuichi Takamine ,  Yoichi Sawada ,  Minefumi Ouchi

IPC分类号： H03H972

CPC分类号： H03H9/0061 ,  H03H9/0042 ,  H03H9/0057 ,  H03H9/0085 ,  H03H9/14582 ,  H03H9/14588

摘要： A longitudinally coupled resonator type surface acoustic wave filter having a balance-unbalance conversion function achieves improved amplitude balance and phase balance. The surface acoustic wave filter includes first, second and third IDTs. The second IDT is positioned in the center of the three IDTs and has an even number of electrode fingers. The polarity of the electrode finger of the first IDT adjacent to the second IDT is opposite to the polarity of the electrode finger of the third IDT adjacent to the second IDT.