公开(公告)号：US06900577B2

公开(公告)日：2005-05-31

申请号：US10353165

申请日：2003-01-28

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H9/145 ,  H03H9/00 ,  H03H9/02 ,  H03H9/64 ,  H03H9/70 ,  H03H9/72 ,  H03H9/74 ,  H02N2/00

CPC分类号： H03H9/6469 ,  H03H9/0028 ,  H03H9/02771 ,  H03H9/643 ,  H03H9/6436 ,  H03H9/725 ,  H03H2240/00 ,  H03H2250/00

摘要： A plurality of surface acoustic wave filters having different center frequencies is provided on a piezoelectric substrate. Either input terminals or output terminals, or both input terminals and output terminals of the surface acoustic wave filters are integrated. Of the surface acoustic wave filters, a surface acoustic wave filter having a higher center frequency is configured so as to suppress a spurious response in the proximity of the high-frequency side in or outside a passband in the filter characteristics of a surface acoustic wave filter having a lower center frequency, for example, such that the width or pitch of electrode fingers in at least one region of reflectors differs from that in other regions.

摘要翻译： 在压电基板上设置具有不同中心频率的多个声表面波滤波器。 输入端子或输出端子，或者声表面波滤波器的输入端子和输出端子都被集成。 在表面声波滤波器中，具有较高中心频率的声表面波滤波器被配置为在表面声波滤波器的滤波器特性中抑制通带内外的高频侧附近的杂散响应 具有较低的中心频率，例如使得反射器的至少一个区域中的电极指的宽度或间距与其它区域中的不同。

公开(公告)号：US20050001699A1

公开(公告)日：2005-01-06

申请号：US10753174

申请日：2004-01-08

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H9/145 ,  H03H9/00 ,  H03H9/02 ,  H03H9/10 ,  H03H9/25 ,  H03H9/64

CPC分类号： H03H9/0071 ,  H03H9/0042 ,  H03H9/0085 ,  H03H9/02685 ,  H03H9/14582 ,  H03H9/14588 ,  H03H9/643 ,  H03H9/6433 ,  H03H9/6436 ,  H03H9/6469 ,  H03H9/6476

摘要： A SAW filter includes at least two IDTs arranged along a SAW propagation direction on a piezoelectric substrate and first and second reflectors sandwiching the IDTs. A group of electrode fingers of each of the first and second reflectors is interdigital-width weighted. Further, a method of interdigital-width weighting of the electrode fingers of the first reflector is different from that of interdigital-width weighting of the electrode fingers of the second reflector.

摘要翻译： SAW滤波器包括沿压电衬底上的SAW传播方向布置的至少两个IDT，以及夹持IDT的第一和第二反射器。 第一和第二反射器中的每一个的一组电极指是叉指宽度加权。 此外，第一反射器的电极指的叉指宽度加权的方法与第二反射器的电极指的叉指宽度加权的方法不同。

公开(公告)号：US06815868B2

公开(公告)日：2004-11-09

申请号：US10118358

申请日：2002-04-09

申请人： Osamu Shibata ,  Yuichi Takamine ,  Hiroki Watanabe ,  Masaru Yata ,  Yoichi Sawada

发明人： Osamu Shibata ,  Yuichi Takamine ,  Hiroki Watanabe ,  Masaru Yata ,  Yoichi Sawada

IPC分类号： H03H925

CPC分类号： H03H9/008 ,  H03H9/0038 ,  H03H9/0042 ,  H03H9/0061 ,  H03H9/0071 ,  H03H9/0085 ,  H03H9/02748 ,  H03H9/14517 ,  H03H9/14532 ,  H03H9/14547 ,  H03H9/14576 ,  H03H9/14579 ,  H03H9/14582 ,  H03H9/14585 ,  H03H9/14588 ,  H03H9/14591 ,  H03H9/6436

摘要： A surface acoustic wave apparatus includes three longitudinally-coupled-resonator-type interdigital transducers (IDTs) having a balanced-to-unbalanced conversion function, which are provided on a piezoelectric substrate in a direction in which a surface acoustic wave (SAW) propagates. Weighting is applied to at least one of the IDTs. For example, among the electrode fingers of the IDT located on the left side, an apodization-weighted electrode finger is provided for one of the electrode fingers positioned adjacent to the central IDT.

摘要翻译： 声表面波装置包括三个具有平衡不平衡转换功能的纵向耦合谐振器型叉指式换能器（IDT），它们在表面声波（SAW）传播的方向上设置在压电基片上。 加权被应用于至少一个IDT。 例如，在位于左侧的IDT的电极指中，设置与位于中央IDT相邻的电极指之一的变迹加重电极指。

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：US06753641B2

公开(公告)日：2004-06-22

申请号：US10050923

申请日：2002-01-22

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H01L4108

CPC分类号： H03H9/0042 ,  H03H9/0061 ,  H03H9/02874 ,  H03H9/02913 ,  H03H9/02921 ,  H03H9/02992 ,  H03H9/14582 ,  H03H9/14591 ,  H03H9/6489

摘要： A surface acoustic wave device includes interdigital electrodes for generating a surface acoustic wave and detecting the wave, which are provided on a piezoelectric substrate having piezoelectric properties. A signal line is arranged so as to be connected to the interdigital electrodes which are unbalanced-side electrodes. Balanced-signal terminals are arranged so as to be connected to the interdigital electrode which is a balanced-side electrode. A ground line is provided between a balanced-signal terminal and the adjacent signal line. A capacitance generated between the signal line and the balanced-signal terminal is minimized by the ground line. Thus, the balance degrees between the balanced-signal terminals are greatly improved.

摘要翻译： 表面声波装置包括用于产生表面声波并用于检测波的指状电极，它们设置在具有压电特性的压电基片上。 信号线被布置成连接到作为不平衡侧电极的叉指电极。 平衡信号端子被布置成连接到作为平衡侧电极的叉指电极。 在平衡信号端子和相邻信号线之间提供接地线。 在信号线和平衡信号端子之间产生的电容被接地线最小化。 因此，平衡信号端子之间的平衡度大大提高。

公开(公告)号：US06731188B2

公开(公告)日：2004-05-04

申请号：US10087800

申请日：2002-03-05

申请人： Yoichi Sawada ,  Yuichi Takamine

发明人： Yoichi Sawada ,  Yuichi Takamine

IPC分类号： H03H964

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

摘要： A surface acoustic wave filter device, having a balanced-to-unbalanced conversion function, in which input/output impedances are different and in which the in-band degree of balance is satisfactory, is obtained. The surface acoustic wave filter device has a balanced-to-unbalanced conversion function, in which the spacing of input/output IDTs of a second surface acoustic wave filter element is larger by approximately half the wavelength of the surface-acoustic wave than that of a first surface acoustic wave filter element so that the phase is inverted, wherein the total of the electrostatic capacitance values of a plurality of IDTs of the second surface acoustic wave filter element is larger than the total of the electrostatic capacitance values of a plurality of IDTs of the first surface acoustic wave filter element.

摘要翻译： 获得具有平衡不平衡转换功能的表面声波滤波器装置，其中输入/输出阻抗不同，并且带内平衡度令人满意。 表面声波滤波器装置具有平衡不平衡转换功能，其中第二声表面波滤波器元件的输入/输出IDT的间隔比表面声波滤波器元件的波长的大约一半大于 第一表面声波滤波器元件，使得相位反转，其中第二声表面波滤波器元件的多个IDT的静电电容值的总和大于多个IDT的静电电容值的总和 第一表面声波滤波器元件。

公开(公告)号：US06710676B2

公开(公告)日：2004-03-23

申请号：US10043133

申请日：2002-01-14

申请人： Masaru Yata ,  Kazunobu Shimoe ,  Yoichi Sawada ,  Hiroki Watanabe ,  Yuichi Takamine

发明人： Masaru Yata ,  Kazunobu Shimoe ,  Yoichi Sawada ,  Hiroki Watanabe ,  Yuichi Takamine

IPC分类号： H03H964

CPC分类号： H03H9/0061 ,  H03H9/0042 ,  H03H9/0071 ,  H03H9/14591

摘要： A surface acoustic wave filter device has a balance-unbalance conversion function and substantially equal input impedance and output impedance so as to increase out-of-passband attenuation. The surface acoustic wave filter device includes an unbalanced signal terminal, first and second balanced signal terminals, and first and second surface acoustic wave filters having input and output impedances. In each filter, one of the input and output impedances is approximately four times the other impedance. Additionally, 2n−1 first surface acoustic wave filters are connected between the unbalanced signal terminal and the first balanced signal terminal, and 2n−1 second surface acoustic wave filters are connected between the unbalanced signal terminal and the second balanced signal terminal, where n is an integer of 1 or more. The second surface acoustic wave filters are 180 degrees out-of-phase with respect to the first surface acoustic wave filters.

摘要翻译： 表面声波滤波器装置具有平衡不平衡转换功能和基本相等的输入阻抗和输出阻抗，以便增加通带衰减。 表面声波滤波器装置包括不平衡信号端子，第一和第二平衡信号端子以及具有输入和输出阻抗的第一和第二声表面波滤波器。 在每个滤波器中，输入和输出阻抗之一约为另一个阻抗的四倍。 另外，2 第一声表面波滤波器连接在不平衡信号端子和第一平衡信号端子之间，并且2 第二声表面波滤波器连接在不平衡信号端子和第二平衡信号端子之间 信号端子，其中n是1或更大的整数。 第二声表面波滤波器相对于第一声表面波滤波器是180度异相。

公开(公告)号：US06700460B2

公开(公告)日：2004-03-02

申请号：US10167853

申请日：2002-06-12

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H964

CPC分类号： H03H9/0042 ,  H03H9/0038 ,  H03H9/0071 ,  H03H9/14582 ,  H03H9/6436

摘要： A longitudinally-coupled resonator mode SAW filter portion having at least two interdigital transducers (IDTs) is disposed on a piezoelectric substrate. At least one SAW resonator is electrically connected in parallel with the SAW filter portion such that the at least one SAW resonator is disposed between an input terminal or an output terminal and the SAW filter portion. The resonance point of the SAW resonator is disposed in the pass band of the SAW filter portion.

摘要翻译： 具有至少两个叉指式换能器（IDT）的纵向耦合谐振模式SAW滤波器部分设置在压电基片上。 至少一个SAW谐振器与SAW滤波器部分并联电连接，使得至少一个SAW谐振器设置在输入端子或输出端子与SAW滤波器部分之间。 SAW谐振器的谐振点设置在SAW滤波器部分的通带中。

公开(公告)号：US06556100B2

公开(公告)日：2003-04-29

申请号：US09931780

申请日：2001-08-17

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H964

CPC分类号： H03H9/6436 ,  H03H9/0042 ,  H03H9/0071 ,  H03H9/14582 ,  H03H9/725 ,  H03H2240/00 ,  H03H2250/00

摘要： A surface acoustic wave filter includes a longitudinally-coupled resonator-type surface acoustic wave filter having at least two interdigital transducers disposed on a piezoelectric substrate along the propagation direction of a surface acoustic wave, and at least one surface acoustic wave resonator connected between an input terminal and/or an output terminal and the longitudinally-coupled resonator-type surface acoustic wave filter. In this surface acoustic wave filter, a pass band is formed by utilizing at least one of the resonant modes of the longitudinally-coupled resonator-type surface acoustic wave filter and the inductance of the surface acoustic wave resonator.

摘要翻译： 表面声波滤波器包括纵向耦合的谐振器型表面声波滤波器，其具有沿声表面波的传播方向设置在压电基片上的至少两个叉指换能器，以及连接在输入端之间的至少一个声表面波谐振器 端子和/或输出端子和纵向耦合的谐振器型表面声波滤波器。 在该声表面波滤波器中，通过利用纵向耦合的谐振器型表面声波滤波器的谐振模式和表面声波谐振器的电感中的至少一个形成通带。

公开(公告)号：US06326864B1

公开(公告)日：2001-12-04

申请号：US09510843

申请日：2000-02-23

申请人： Yuichi Takamine ,  Norio Taniguchi

发明人： Yuichi Takamine ,  Norio Taniguchi

IPC分类号： H03H964

CPC分类号： H03H9/6483

摘要： A surface acoustic wave filter includes at least two series arm surface acoustic wave resonators provided in an series arm and at least one parallel arm surface acoustic wave resonator provided in a parallel arm. At least one of the series arm surface acoustic wave resonators has a plurality of anti-resonant points and a sub-resonant point located between the anti-resonant points. The sub-resonant point substantially matches an anti-resonant point of at least one of the remaining series arm surface acoustic wave resonators.

摘要翻译： 表面声波滤波器包括设置在串联臂中的至少两个串联臂表面声波谐振器和设置在并联臂中的至少一个并联臂声表面波谐振器。 串联臂声表面波谐振器中的至少一个具有多个反谐振点和位于反谐振点之间的子共振点。 副谐振点基本上与剩余的串联臂声表面波谐振器中的至少一个的反谐振点相匹配。