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：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：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.

公开(公告)号：US08736402B2

公开(公告)日：2014-05-27

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 ,  H03H9/145 ,  H03H9/02 ,  H03H9/00

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。

公开(公告)号：US08305160B2

公开(公告)日：2012-11-06

申请号：US13327961

申请日：2011-12-16

申请人： Ayaka Yamamoto ,  Yuichi Takamine

发明人： Ayaka Yamamoto ,  Yuichi Takamine

IPC分类号： H03H9/72 ,  H03H9/64

CPC分类号： H03H9/725 ,  H03H9/0057 ,  H03H9/0085 ,  H03H9/02716 ,  H03H9/02992 ,  H03H9/14573 ,  H03H9/6483

摘要： An elastic wave device includes an unbalanced terminal and first and second balanced terminals. A longitudinally-coupled-resonator-type first elastic wave filter is provided between the unbalanced terminal and the first balanced terminal. An elastic wave filter, which is connected in parallel with the first elastic wave filter, is connected between the unbalanced terminal and the second balanced terminal. The current paths through which IDT electrodes of the elastic wave filters of the elastic wave device are connected to ground terminals, are not symmetrical.

摘要翻译： 弹性波装置包括不平衡端子和第一和第二平衡端子。 在不平衡端子和第一平衡端子之间设置纵向耦合谐振器型第一弹性波滤波器。 与第一弹性波滤波器并联连接的弹性波滤波器连接在不平衡端子和第二平衡端子之间。 弹性波装置的弹性波滤波器的IDT电极与接地端子连接的电流路径不对称。

公开(公告)号：US07876176B2

公开(公告)日：2011-01-25

申请号：US12336563

申请日：2008-12-17

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H9/72 ,  H03H9/64

CPC分类号： H03H9/008 ,  H03H9/0071 ,  H03H9/0085 ,  H03H9/02748 ,  H03H9/725

摘要： An acoustic wave filter device includes first to fourth longitudinally coupled resonator type surface acoustic wave filters that are configured such that the first and second filters are connected to a first balanced signal terminal, the third and fourth filters are connected to a second balanced signal terminal, and a transmission phase of a signal output from the first balanced signal terminal relative to an input signal differs by about 180 degrees with respect to a transmission phase of a signal output from the second balanced signal terminal relative to an input signal. In addition, the number of pairs of electrode fingers of at least one of IDTs of at least one of the first to fourth longitudinally coupled resonator type surface acoustic wave filters is different from the number of pairs of electrode fingers of corresponding IDTs of the remaining first to fourth filters.

摘要翻译： 声波滤波器装置包括第一至第四纵向耦合的谐振器型表面声波滤波器，其被配置为使得第一和第二滤波器连接到第一平衡信号端子，第三和第四滤波器连接到第二平衡信号端子， 相对于从第二平衡信号端子相对于输入信号输出的信号的发送相位，相对于输入信号从第一平衡信号端子输出的信号的发送相位相差大约180度。 此外，第一至第四纵向耦合的谐振器型表面声波滤波器中的至少一个的至少一个IDT的电极指的对数与剩余的第一至第四纵向耦合谐振器型表面声波滤波器的相应IDT的电极指的对数不同 到第四个过滤器。

公开(公告)号：US20070018756A1

公开(公告)日：2007-01-25

申请号：US10568114

申请日：2005-07-12

申请人： Yasuhisa Fujii ,  Yuichi Takamine

发明人： Yasuhisa Fujii ,  Yuichi Takamine

IPC分类号： H03H9/64

CPC分类号： H03H9/0057 ,  H03H9/0061 ,  H03H9/0071 ,  H03H9/0085 ,  H03H9/14588

摘要： A surface acoustic wave device includes a substrate, a plurality of terminals including at least an unbalanced terminal and balanced terminals, and at least one of surface acoustic wave element disposed between the unbalanced terminal and the two balanced terminals. Different signal lines connected to the same surface acoustic wave element intersect through insulating films.

摘要翻译： 表面声波装置包括基板，至少包括不平衡端子和平衡端子的多个端子以及设置在不平衡端子和两个平衡端子之间的表面声波元件中的至少一个。 连接到同一声表面波元件的不同信号线通过绝缘膜相交。

公开(公告)号：US20050212621A1

公开(公告)日：2005-09-29

申请号：US10521776

申请日：2004-08-19

申请人： Yuichi Takamine

发明人： Yuichi Takamine

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

CPC分类号： H03H9/14582 ,  H03H9/0038 ,  H03H9/0057 ,  H03H9/008 ,  H03H9/14588

摘要： In a longitudinally-coupled-resonator surface acoustic wave filter unit having a first interdigital transducer, a central interdigital transducer, a second interdigital transducer, and first and second reflectors arranged such that the interdigital transducers are provided therebetween, for one comb electrode of the central interdigital transducer, first and second comb electrodes, which are substantially symmetrically bisected along a surface-acoustic-wave propagation direction, are provided. Between the first and second comb electrodes, a design parameter of at least one of the interdigital transducers, and the reflectors is set to be different from one another.

摘要翻译： 在具有第一叉指换能器，中央叉指式换能器，第二叉指式换能器以及第一和第二反射器的纵向耦合谐振器表面声波滤波器单元中，所述第一和第二反射器布置成使得叉指换能器设置在其间，用于中心的一个梳电极 提供了沿着表面声波传播方向基本对称地平分的叉指式换能器，第一和第二梳状电极。 在第一梳状电极和第二梳状电极之间，交叉指型传感器和反射器中的至少一个的设计参数被设定为彼此不同。

公开(公告)号：US06816036B2

公开(公告)日：2004-11-09

申请号：US10205983

申请日：2002-07-26

申请人： Yuichi Takamine

发明人： Yuichi Takamine

IPC分类号： H03H900

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

摘要： A SAW filter includes a plurality of IDTs arranged on substrate along a SAW propagation direction, and balanced signal terminals connected to an IDT. The SAW filter is a floating balanced type. The plurality of IDTs are arranged so as to provide a horizontally asymmetrical structure with respect to an imaginary axis that is positioned at the approximate center of the center IDT in the SAW propagation direction and which is substantially perpendicular to the SAW propagation direction. Thus, a SAW filter having filtering characteristics and a balance-to-unbalance conversion function is achieved with high balance between the balanced signal terminals.

摘要翻译： SAW滤波器包括沿着SAW传播方向布置在衬底上的多个IDT，以及连接到IDT的平衡信号端子。 SAW滤波器是一种浮动平衡型。 多个IDT被布置为提供相对于位于SAW传播方向上的中心IDT的大致中心并且基本上垂直于SAW传播方向的假想轴的水平不对称结构。 因此，在平衡信号端子之间具有高平衡的情况下，实现了具有滤波特性和平衡 - 不平衡转换功能的SAW滤波器。

公开(公告)号：US06815870B2

公开(公告)日：2004-11-09

申请号：US10348189

申请日：2003-01-22

申请人： Osamu Shibata ,  Yuichi Takamine

发明人： Osamu Shibata ,  Yuichi Takamine

IPC分类号： H01L4108

CPC分类号： H03H9/14582 ,  H03H9/0071

摘要： A surface acoustic wave device having an unbalanced-to-balanced conversion function, which is capable of improving balanced characteristics, includes a first resonator filter and a second resonator filter, having a plurality of interdigital transducers disposed along the propagation direction of a surface acoustic wave. The surface acoustic wave device has an unbalanced-to-balanced conversion function as a result of the phase of the second resonator filter being reversed by 180° with respect to that of the first resonator filter. The surface acoustic wave device further includes a first resonator connected in series to an unbalanced signal terminal side of the first resonator filter, and a second resonator connected in series to an unbalanced signal terminal side of the second resonator filter. The first resonator and the second resonator have different design parameters.

摘要翻译： 具有能够改善平衡特性的不平衡转换功能的表面声波装置包括：第一谐振滤波器和第二谐振滤波器，具有沿表面声波的传播方向设置的多个叉指换能器 。 作为第二谐振滤波器的相位相对于第一谐振滤波器的相位反转180°的结果，表面声波装置具有不平衡平衡转换功能。 表面声波装置还包括与第一谐振滤波器的不平衡信号端子侧串联连接的第一谐振器和与第二谐振滤波器的不平衡信号端子侧串联连接的第二谐振器。 第一谐振器和第二谐振器具有不同的设计参数。