公开(公告)号：US07295089B2

公开(公告)日：2007-11-13

申请号：US10773818

申请日：2004-02-06

申请人： Teruhisa Shibahara ,  Norihiko Nakahashi ,  Hiroki Watanabe ,  Yuichi Takamine

发明人： Teruhisa Shibahara ,  Norihiko Nakahashi ,  Hiroki Watanabe ,  Yuichi Takamine

IPC分类号： H03H9/64

CPC分类号： H03H9/0071 ,  H03H9/0038 ,  H03H9/0085 ,  H03H9/009 ,  H03H9/14582 ,  H03H9/14588 ,  H03H9/6483

摘要： A surface acoustic wave (SAW) filter includes a piezoelectric substrate. A resin pattern having a permittivity less than that of the piezoelectric substrate and first and second conductor patterns are disposed on the piezoelectric substrate. The first conductor pattern defines two one-terminal-pair SAW resonators and two longitudinally coupled resonator SAW filters. A portion of the second conductor pattern defines wiring traces having different potentials. Portions of the wiring traces facing each other in a plan view are disposed on the resin pattern.

摘要翻译： 表面声波（SAW）滤波器包括压电基片。 具有比压电基片和第一和第二导体图案的介电常数小的介电常数的树脂图案设置在压电基片上。 第一导体图形定义了两个单端子对SAW谐振器和两个纵向耦合的谐振器SAW滤波器。 第二导体图案的一部分限定具有不同电位的布线迹线。 在平面图中彼此面对的布线迹线的部分布置在树脂图案上。

公开(公告)号：US20060208834A1

公开(公告)日：2006-09-21

申请号：US10595383

申请日：2005-08-10

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H9/64

CPC分类号： H03H9/0071 ,  H03H9/0038 ,  H03H9/14582 ,  H03H9/14588 ,  H03H9/6436 ,  H03H9/6476

摘要： In a balanced-type surface acoustic wave filter, IDTs in the center of each of first and second longitudinally coupled resonator type surface acoustic wave filter sections are connected to an unbalanced input terminal, first and third IDT sections on both the sides of the center IDT are connected to first and second balanced output terminals, respectively, the first and third IDTs have narrow pitch electrode finger sections N, and when an electrode finger pitch of the narrow pitch electrode finger section of the second IDT is P1, an electrode finger pitch of the narrow pitch electrode finger section of the first and third IDTs is P2, the number of electrode fingers of the second IDT except for the narrow pitch electrode finger section of the IDT is K1, and the number of electrode fingers of the first and third IDT except for the narrow pitch electrode finger section is K2, P1>P2 and 1.12≦K1/K2≦1.65 are satisfied.

摘要翻译： 在平衡型表面声波滤波器中，第一和第二纵向耦合谐振器型表面声波滤波器部分的中心的IDT与不平衡输入端子连接，中心IDT的两侧的第一和第三IDT部分 分别连接到第一和第二平衡输出端子，第一和第三IDT具有窄间距电极指部分N，并且当第二IDT的窄间距电极指部分的电极指间距为P1时，电极指间距 第一和第三IDT的窄间距电极指部分是P2，除了IDT的窄间距电极指部分之外的第二IDT的电极指的数量是K1，并且第一和第三IDT的电极指的数量 除了窄间距电极指部分是K2，P1> P2和1.12 <= K1 / K2 <= 1.65。

公开(公告)号：US07015776B2

公开(公告)日：2006-03-21

申请号：US10753174

申请日：2004-01-08

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H9/25 ,  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：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：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：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。