公开(公告)号：US20110074527A1

公开(公告)日：2011-03-31

申请号：US12890120

申请日：2010-09-24

申请人： Eiko WAKATA

发明人： Eiko WAKATA

IPC分类号： H01P1/203

CPC分类号： H03H7/1791 ,  H01P1/20345 ,  H03H7/0123 ,  H03H7/09 ,  H03H7/1708 ,  H03H7/1775 ,  H03H7/1783

摘要： A bandpass filter includes three resonators of which adjacent two are electromagnetically coupled to each other, and two coupling paths connected in parallel for forming capacitive coupling between non-adjacent two of the resonators. Each of the two coupling paths includes at least one capacitor and an inductor connected in series. The two coupling paths function to form an attenuation pole at a frequency lower than the passband frequencies in the pass attenuation characteristics of the bandpass filter.

摘要翻译： 带通滤波器包括三个谐振器，其中相邻的两个谐振器彼此电磁耦合，以及并联连接的两个耦合路径，用于在不相邻的两个谐振器之间形成电容耦合。 两个耦合路径中的每一个包括串联连接的至少一个电容器和电感器。 两个耦合路径用于在带通滤波器的通过衰减特性中以低于通带频率的频率处形成衰减极点。

公开(公告)号：US08378763B2

公开(公告)日：2013-02-19

申请号：US12890120

申请日：2010-09-24

申请人： Eiko Wakata

发明人： Eiko Wakata

IPC分类号： H01P1/203 ,  H03H7/32

CPC分类号： H03H7/1791 ,  H01P1/20345 ,  H03H7/0123 ,  H03H7/09 ,  H03H7/1708 ,  H03H7/1775 ,  H03H7/1783

摘要： A bandpass filter includes three resonators of which adjacent two are electromagnetically coupled to each other, and two coupling paths connected in parallel for forming capacitive coupling between non-adjacent two of the resonators. Each of the two coupling paths includes at least one capacitor and an inductor connected in series. The two coupling paths function to form an attenuation pole at a frequency lower than the passband frequencies in the pass attenuation characteristics of the bandpass filter.

摘要翻译： 带通滤波器包括三个谐振器，其中相邻的两个谐振器彼此电磁耦合，以及并联连接的两个耦合路径，用于在不相邻的两个谐振器之间形成电容耦合。 两个耦合路径中的每一个包括串联连接的至少一个电容器和电感器。 两个耦合路径用于在带通滤波器的通过衰减特性中以低于通带频率的频率处形成衰减极点。

公开(公告)号：US20120249264A1

公开(公告)日：2012-10-04

申请号：US13429982

申请日：2012-03-26

申请人： Eiko WAKATA ,  Shigemitsu TOMAKI ,  Isao ABE

发明人： Eiko WAKATA ,  Shigemitsu TOMAKI ,  Isao ABE

IPC分类号： H03H7/01

CPC分类号： H01P1/20345 ,  H03H7/12 ,  H03H2001/0085

摘要： A bandpass filter includes a layered structure including a plurality of stacked dielectric layers, and first to third resonators provided within the layered structure. In terms of circuit configuration, the second resonator is located between the first and third resonators. The first resonator includes a first inductor and a first capacitor. The second resonator includes a second inductor and a second capacitor. The third resonator includes a third inductor and a third capacitor. The second inductor is disposed at a position different from that of each of the first and third inductors in the stacking direction of the dielectric layers. The second inductor is lower in inductance than the first and third inductors. The second capacitor is higher in capacitance than the first and third capacitors.

摘要翻译： 带通滤波器包括层叠结构，其包括多层堆叠介质层，以及设置在分层结构内的第一至第三谐振器。 在电路结构方面，第二谐振器位于第一和第三谐振器之间。 第一谐振器包括第一电感器和第一电容器。 第二谐振器包括第二电感器和第二电容器。 第三谐振器包括第三电感器和第三电容器。 第二电感器设置在与电介质层的层叠方向上的第一和第三电感器的位置不同的位置处。 第二电感器的电感比第一和第三电感器低。 第二电容器的电容高于第一和第三电容器。

公开(公告)号：US20070229191A1

公开(公告)日：2007-10-04

申请号：US11681563

申请日：2007-03-02

申请人： Masahiro Yamaki ,  Yoshikazu Kihara ,  Eiko Wakata

发明人： Masahiro Yamaki ,  Yoshikazu Kihara ,  Eiko Wakata

IPC分类号： H03H9/64

CPC分类号： H03H9/725 ,  H03H9/02818 ,  H03H9/0576 ,  H03H9/6483 ,  H03H9/72

摘要： A surface acoustic wave element comprises a first surface acoustic wave element unit formed on a surface of a piezo-electric substrate, and a second surface acoustic wave element unit formed on the surface of said piezo-electric substrate adjacent to said first surface acoustic wave element unit. Each of said first surface acoustic wave element unit and said second surface acoustic wave element unit includes a signal input terminal, a signal output terminal, a ground terminal, a signal path for coupling said signal input terminal to the signal output terminal, series arm resonators connected in series on said signal path, a branch line branched from said signal path to said ground terminal, and parallel arm resonators connected on said branch line. The signal path of at least one of the first surface acoustic wave element unit and second surface acoustic wave element unit is extended outside of the center line of said surface acoustic wave element unit.

摘要翻译： 表面声波元件包括形成在压电基板的表面上的第一表面声波元件单元和形成在所述压电基板的与所述第一声表面波元件相邻的表面上的第二声表面波元件单元 单元。 所述第一表面声波元件单元和所述第二表面声波元件单元中的每一个包括信号输入端子，信号输出端子，接地端子，用于将所述信号输入端子耦合到信号输出端子的信号路径，串联臂谐振器 在所述信号路径上串联连接，从所述信号路径分支到所述接地端子的分支线以及连接在所述分支线路上的并联臂谐振器。 第一表面声波元件单元和第二声表面波元件单元中的至少一个的信号路径延伸到所述表面声波元件单元的中心线的外侧。

公开(公告)号：US08952767B2

公开(公告)日：2015-02-10

申请号：US13429982

申请日：2012-03-26

申请人： Eiko Wakata ,  Shigemitsu Tomaki ,  Isao Abe

发明人： Eiko Wakata ,  Shigemitsu Tomaki ,  Isao Abe

IPC分类号： H03H7/12 ,  H01P1/203 ,  H03H1/00

CPC分类号： H01P1/20345 ,  H03H7/12 ,  H03H2001/0085

摘要： A bandpass filter includes a layered structure including a plurality of stacked dielectric layers, and first to third resonators provided within the layered structure. In terms of circuit configuration, the second resonator is located between the first and third resonators. The first resonator includes a first inductor and a first capacitor. The second resonator includes a second inductor and a second capacitor. The third resonator includes a third inductor and a third capacitor. The second inductor is disposed at a position different from that of each of the first and third inductors in the stacking direction of the dielectric layers. The second inductor is lower in inductance than the first and third inductors. The second capacitor is higher in capacitance than the first and third capacitors.

摘要翻译： 带通滤波器包括层叠结构，其包括多层堆叠介质层，以及设置在分层结构内的第一至第三谐振器。 在电路结构方面，第二谐振器位于第一和第三谐振器之间。 第一谐振器包括第一电感器和第一电容器。 第二谐振器包括第二电感器和第二电容器。 第三谐振器包括第三电感器和第三电容器。 第二电感器设置在与电介质层的层叠方向上的第一和第三电感器的位置不同的位置处。 第二电感器的电感比第一和第三电感器低。 第二电容器的电容高于第一和第三电容器。