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。

公开(公告)号：US08067879B2

公开(公告)日：2011-11-29

申请号：US12836595

申请日：2010-07-15

申请人： Hayami Kudo ,  Yuichi Takamine ,  Katsuhiro Ikada

发明人： Hayami Kudo ,  Yuichi Takamine ,  Katsuhiro Ikada

IPC分类号： H01L41/053 ,  H03H9/25

CPC分类号： H03H9/1092 ,  H01L2224/05001 ,  H01L2224/05022 ,  H01L2224/05644 ,  H01L2224/05655 ,  H01L2224/13 ,  H03H9/059 ,  H01L2924/00014

摘要： A piezoelectric device includes a piezoelectric substrate, a conductive pattern which is provided on one main surface of the piezoelectric substrate and which includes an IDT electrode, a supporting layer which is arranged on the one main surface of the piezoelectric substrate so as to surround the periphery of an IDT-forming region in which the IDT electrode is provided and which has a thickness greater than that of the IDT electrode, and a cover layer which is arranged on the supporting layer and which covers the IDT-forming region. The supporting layer includes removed sections provided at a plurality of positions at least in a region close to the IDT-forming region, the removed sections being obtained by partially removing a portion of the supporting layer to be bonded to the one main surface of the piezoelectric substrate.

摘要翻译： 一种压电装置，包括压电基板，设置在压电基板的一个主表面上并具有IDT电极的导电图案，支撑层布置在压电基板的一个主表面上以围绕周边 的IDT形成区域，其中设置有IDT电极并且其厚度大于IDT电极的厚度;以及覆盖层，其被布置在支撑层上并覆盖IDT形成区域。 支撑层包括设置在至少在靠近IDT形成区域的区域中的多个位置处的去除部分，所述去除部分通过部分地去除要结合到压电体的一个主表面的支撑层的一部分而获得 基质。

公开(公告)号：US20110156842A1

公开(公告)日：2011-06-30

申请号：US13045587

申请日：2011-03-11

申请人： Yuichi TAKAMINE

发明人： Yuichi TAKAMINE

IPC分类号： H03H9/64

CPC分类号： H03H9/14582 ,  H03H9/0071 ,  H03H9/02535 ,  H03H9/14535 ,  H03H9/6433

摘要： An elastic wave filter device having improved sharpness of filter characteristics includes a longitudinally-coupled resonator-type elastic wave filter section including first to third IDT electrodes each including a plurality of electrode fingers, and first and second reflectors. The first to third IDT electrodes include narrower-pitch portions provided in end portions thereof, which are each adjacent to another IDT electrode in a direction of propagation of elastic waves, each of the narrower-pitch portions having a smaller period of electrode fingers than a period of electrode fingers in the remaining portion of the relevant IDT electrode. The number of electrode fingers in the narrower-pitch portion of the second IDT electrode, which is disposed on the side closer to the first IDT electrode, and the number of electrode fingers in the narrower-pitch portion of the second IDT electrode, which is disposed on the side closer to the third IDT electrode, differ from each other.

摘要翻译： 具有提高的滤波器特性的清晰度的弹性波滤波器装置包括纵向耦合的谐振器型弹性波滤波器部分，其包括每个包括多个电极指的第一至第三IDT电极以及第一和第二反射器。 第一至第三IDT电极包括设置在其端部的窄节距部分，其在弹性波的传播方向上与另一IDT电极相邻，每个较窄的节距部分具有较小的电极指的周期 在相关IDT电极的剩余部分中的电极指的周期。 设置在靠近第一IDT电极的一侧的第二IDT电极的窄节距部分中的电极指的数量和第二IDT电极的窄节距部分中的电极指的数量 设置在更靠近第三IDT电极的一侧彼此不同。