公开(公告)号：US20170117873A1

公开(公告)日：2017-04-27

申请号：US15290079

申请日：2016-10-11

申请人： Murata Manufacturing Co., Ltd.

发明人： Toshiaki TAKATA

IPC分类号： H03H9/54 ,  H03H9/70

CPC分类号： H03H9/725 ,  H03H9/0576 ,  H03H9/54 ,  H03H9/6433 ,  H03H9/6476 ,  H03H9/6483 ,  H03H9/6493 ,  H03H9/70

摘要： A band pass filter includes a longitudinally coupled resonator elastic wave filter on a piezoelectric substrate and parallel arm resonators at parallel arms, each connected between a series arm connecting an antenna terminal and a receiving terminal and one of ground terminals. The parallel arm resonators include a first parallel arm resonator having the highest resonance frequency among the parallel arm resonators and a second parallel arm resonator. A second ground terminal that is one of the ground terminals connected to the second parallel arm resonator and a third ground terminal that is one of the ground terminals connected to the longitudinally coupled resonator elastic wave filter are connected to each other. A first ground terminal that is one of the ground terminals connected to the first parallel arm resonator is not connected to the second or third ground terminals.

公开(公告)号：US09118297B2

公开(公告)日：2015-08-25

申请号：US14600201

申请日：2015-01-20

申请人： Murata Manufacturing Co., Ltd.

发明人： Minefumi Ouchi

IPC分类号： H03H9/72 ,  H03H9/64 ,  H03H9/00

CPC分类号： H03H9/0038 ,  H03H9/008 ,  H03H9/6436 ,  H03H9/6493 ,  H03H9/725

摘要： A balanced-unbalanced conversion-type elastic wave device includes an unbalanced signal terminal, first and second balanced signal terminals, and first to fifth interdigital transducers disposed along an elastic wave propagation direction. One end of each of the first, third, and fifth interdigital transducers is connected in common to the unbalanced signal terminal, one end of each of the second interdigital transducer and the fourth interdigital transducer is connected to the first and second balanced signal terminals respectively, a first inductance is connected between the first interdigital transducer and a ground potential, and a second inductance is connected between the fifth interdigital transducer and the ground potential. First and second inductance values of the first and second inductances, respectively, are different.

摘要翻译： 平衡不平衡转换型弹性波装置包括不平衡信号端子，第一和第二平衡信号端子以及沿弹性波传播方向设置的第一至第五叉指式换能器。 第一，第三和第五叉指换能器中的每一个的一端共同连接到不平衡信号端子，第二叉指式换能器和第四叉指式换能器中的每一端的一端分别连接到第一和第二平衡信号端子， 第一电感连接在第一叉指换能器和地电位之间，第二电感连接在第五叉指换能器和地电位之间。 第一和第二电感的第一和第二电感值分别不同。

公开(公告)号：US20150130551A1

公开(公告)日：2015-05-14

申请号：US14600201

申请日：2015-01-20

申请人： Murata Manufacturing Co., Ltd.

发明人： Minefumi OUCHI

IPC分类号： H03H9/00 ,  H03H9/72

CPC分类号： H03H9/0038 ,  H03H9/008 ,  H03H9/6436 ,  H03H9/6493 ,  H03H9/725

摘要： A balanced-unbalanced conversion-type elastic wave device includes an unbalanced signal terminal, first and second balanced signal terminals, and first to fifth interdigital transducers disposed along an elastic wave propagation direction. One end of each of the first, third, and fifth interdigital transducers is connected in common to the unbalanced signal terminal, one end of each of the second interdigital transducer and the fourth interdigital transducer is connected to the first and second balanced signal terminals respectively, a first inductance is connected between the first interdigital transducer and a ground potential, and a second inductance is connected between the fifth interdigital transducer and the ground potential. First and second inductance values of the first and second inductances, respectively, are different.

摘要翻译： 平衡不平衡转换型弹性波装置包括不平衡信号端子，第一和第二平衡信号端子以及沿弹性波传播方向设置的第一至第五叉指式换能器。 第一，第三和第五叉指换能器中的每一个的一端共同连接到不平衡信号端子，第二叉指式换能器和第四叉指式换能器中的每一端的一端分别连接到第一和第二平衡信号端子， 第一电感连接在第一叉指换能器和地电位之间，第二电感连接在第五叉指换能器和地电位之间。 第一和第二电感的第一和第二电感值分别不同。

公开(公告)号：US20140176257A1

公开(公告)日：2014-06-26

申请号：US14096046

申请日：2013-12-04

申请人： Murata Manufacturing Co., Ltd.

发明人： Yuichi TAKAMINE

IPC分类号： H03H9/64 ,  H03H9/72

CPC分类号： H03H9/725 ,  H03H9/0028 ,  H03H9/0576 ,  H03H9/6433 ,  H03H9/6493

摘要： An elastic-wave filter device includes a reception filter section including a longitudinally coupled resonator-type elastic-wave filter section that has a balanced-to-unbalanced conversion function and has improved common-mode isolation characteristics. Among IDT electrodes of a filter section, each of the other comb-shaped electrode of a first IDT electrode including a pair of comb-shaped electrodes, one of which is connected to a first balanced-signal terminal, and the other comb-shaped electrode of a second IDT electrode including a pair of comb-shaped electrodes, one of which is connected to a second balanced-signal terminal, is connected to one of ground electrodes that are provided on a piezoelectric substrate. Inductors are provided on the piezoelectric substrate, and each inductor is connected between the other comb-shaped electrode of one of the first and second IDT electrodes and one of the ground electrodes.

摘要翻译： 弹性波滤波器装置包括接收滤波器部分，其包括纵向耦合的谐振器型弹性波滤波器部分，其具有平衡不平衡转换功能并具有改进的共模隔离特性。 在滤波器部分的IDT电极中，第一IDT电极的另一个梳状电极中的每一个包括一对梳状电极，其中一个梳状电极连接到第一平衡信号端子，另一个梳状电极 包括一对梳状电极的第二IDT电极，其中一个连接到第二平衡信号端子的梳状电极连接到设置在压电基板上的一个接地电极。 电感器设置在压电基板上，每个电感器连接在第一和第二IDT电极之一的另一个梳状电极和一个接地电极之间。

公开(公告)号：US08207800B2

公开(公告)日：2012-06-26

申请号：US12587818

申请日：2009-10-14

申请人： Tadaaki Tsuda

发明人： Tadaaki Tsuda

IPC分类号： H03H9/64

CPC分类号： H03H9/14547 ,  H03H9/02716 ,  H03H9/14558 ,  H03H9/14561 ,  H03H9/14564 ,  H03H9/14567 ,  H03H9/643 ,  H03H9/6493

摘要： To provide an elastic wave filter capable of obtaining steep attenuation at a high band side or a low band side in a pass band and having high selectivity. An elastic wave filter is configured in a manner that when seen in a propagation direction of an elastic wave, as for respective electrode fingers composing each group of electrode fingers in an input side tapered IDT electrode and an output side tapered IDT electrode, width dimensions thereof are the same one another, and a distance dimension between the adjacent electrode fingers is formed to be the same as the width dimension of the electrode finger, when seen in the propagation direction of an elastic wave, as for a group of electrode fingers in a grating reflector, width dimensions of respective electrode fingers composing the group of the electrode fingers are the same, and a distance dimension between the adjacent electrode fingers is formed to be the same as the width dimension, and the width dimension of the electrode finger and the distance dimension between the electrode fingers are set to be equal to or less than a minimum value or equal to or more than a maximum value of the width dimension of the electrode finger and the distance dimension between the electrode fingers in the input side tapered IDT electrode and the output side tapered IDT electrode.

摘要翻译： 提供能够在通带中在高频带侧或低频带侧获得陡峭衰减并且具有高选择性的弹性波滤波器。 以弹性波的传播方向观察弹性波滤波器的结构，对于构成输入侧锥形IDT电极和输出侧锥形IDT电极中的各组电极指的各电极指，其宽度尺寸 彼此相同，并且当在弹性波的传播方向上看时，相邻电极指之间的距离尺寸形成为与电极指的宽度尺寸相同，对于一组电极指在 光栅反射器，构成电极指的组的各个电极指的宽度尺寸相同，并且相邻电极指之间的距离尺寸形成为与宽度尺寸相同，并且电极指和 电极指之间的距离尺寸被设定为等于或小于最大值的最小值或者等于或大于最大值t 电极指的宽度尺寸和输入侧锥形IDT电极和输出侧锥形IDT电极中的电极指之间的距离尺寸。

公开(公告)号：US08169279B2

公开(公告)日：2012-05-01

申请号：US12589431

申请日：2009-10-23

申请人： Orest Fedan

发明人： Orest Fedan

IPC分类号： H03H9/64 ,  H03H9/52 ,  H04B1/12

CPC分类号： H03H9/6493 ,  H03H9/0009 ,  H03H2007/013

摘要： A notched SAW image frequency rejection filter system includes a SAW filter having an input, an output and a ground output and an impedance matching network including a first matching inductance connected to the SAW filter output and a second matching inductance connected to the ground output of the SAW filter; the SAW filter having an inherent internal capacitance that produces a predetermined capacitive leakage current at the image frequency; an inherent internal inductance that produces an inductance leakage current at the image frequency; and a boosted inherent parasitic ground inductance at the ground output of the SAW filter for generating a voltage across the second matching inductance to produce a compensation current which is substantially opposite in phase and substantially matched in magnitude with the capacitive leakage current for reducing the capacitive leakage current and increasing the image frequency rejection.

摘要翻译： 缺陷SAW图像频率抑制滤波器系统包括具有输入，输出和接地输出的SAW滤波器和包括连接到SAW滤波器输出的第一匹配电感的阻抗匹配网络和连接到SAW滤波器输出的第二匹配电感 SAW滤波器 所述SAW滤波器具有在图像频率下产生预定电容性漏电流的固有内部电容; 在图像频率下产生电感泄漏电流的固有内部电感; 以及在SAW滤波器的接地输出处的增强的固有寄生接地电感，用于产生跨越第二匹配电感的电压，以产生基本上相位相反的幅度并且与用于减小电容性泄漏的电容性泄漏电流大体上匹配的补偿电流 电流和增加图像频率抑制。

公开(公告)号：US08013692B2

公开(公告)日：2011-09-06

申请号：US12962864

申请日：2010-12-08

申请人： Kazumasa Haruta

发明人： Kazumasa Haruta

IPC分类号： H03H9/64

CPC分类号： H03H9/059 ,  H01L2224/11 ,  H03H9/1071 ,  H03H9/14538 ,  H03H9/6483 ,  H03H9/6493

摘要： A boundary acoustic wave device includes an electrode structure that is provided at the interface between a piezoelectric substrate and a dielectric layer. The electrode structure defines a ladder filter in which at least two ground pads of a plurality of ground pads, to be connected to a ground potential, provided on the piezoelectric substrate are electrically connected by a connection conductor provided on the dielectric layer, and all of the ground pads are electrically connected.

摘要翻译： 声界面波装置包括设置在压电基板与电介质层之间的界面处的电极结构。 电极结构限定梯形滤波器，其中设置在压电基板上的要连接到地电位的多个接地焊盘的至少两个接地焊盘通过设置在电介质层上的连接导体电连接， 接地焊盘电连接。

公开(公告)号：US07876179B2

公开(公告)日：2011-01-25

申请号：US12091077

申请日：2006-10-12

申请人： Thomas Bauer ,  Matthias Jungkunz

发明人： Thomas Bauer ,  Matthias Jungkunz

IPC分类号： H03H9/64

CPC分类号： H03H9/6409 ,  H03H9/6493

摘要： A band-stop filter is described herein. The band-stop filter includes a piezoelectric substrate and a plurality of surface wave element (SAW) impedance elements on the substrate. The band-stop filter also includes at least one series branch comprising at least one series resonator having a finger period, and a plurality of parallel branches connected electrically in parallel with the series branch, each parallel branch including at least one parallel impedance element comprising an interdigital transducer and having a finger period. The average finger period of the at least one series resonator is greater than the average finger period of the at least one parallel impedance element.

摘要翻译： 这里描述了带阻滤波器。 带阻滤波器包括压电基片和基片上的多个表面波元件（SAW）阻抗元件。 带阻滤波器还包括至少一个串联支路，其包括至少一个具有指状周期的串联谐振器，以及与串联支路并联电连接的多个并联支路，每个并联支路包括至少一个并联阻抗元件， 叉指换能器并具有手指周期。 所述至少一个串联谐振器的平均手指周期大于所述至少一个并联阻抗元件的平均手指周期。

公开(公告)号：US20100127799A1

公开(公告)日：2010-05-27

申请号：US11995022

申请日：2006-06-06

申请人： Thomas Bauer ,  Christian Math

发明人： Thomas Bauer ,  Christian Math

IPC分类号： H03H9/64

CPC分类号： H03H9/6433 ,  H03H9/0542 ,  H03H9/0557 ,  H03H9/14597 ,  H03H9/6493

摘要： The invention relates to a filter with a first partial filter (TF1), comprising a series resonator (S1) and at least two parallel resonators (P1, P2) that are arranged in respective parallel branches, and with a second partial filter (TF2) configured as a DMS filter. The filter also comprises a housing with a plurality of internal housing contacts (GKi) on a base plate that are connected to terminal areas on the substrate (SU) and external housing contacts (GKa), fewer than the internal contacts, that are connected to the internal housing contacts (GKi) via lines (DL1, DL2) guided within the base plate. At least two lines for connections to ground of the first parallel resonator (P1) and the second partial filter (TF2) are guided separately in or on the base plate and are connected to at least two different external housing contacts (E4, E2).

摘要翻译： 本发明涉及一种具有第一部分滤波器（TF1）的滤波器，包括串联谐振器（S1）和至少两个并联谐振器（P1，P2），其布置在相应的平行分支中，并且具有第二部分滤波器（TF2） 配置为DMS过滤器。 滤波器还包括壳体，其在基板上具有多个内部壳体触点（GKi），所述多个内部壳体触点（GKi）连接到基板（SU）上的端子区域，并且外部壳体触点（GKa）比内部触点少， 在基板内引导的经由线路（DL1，DL2）的内部壳体触点（GKi）。 用于连接到第一并联谐振器（P1）和第二部分滤波器（TF2）的接地的至少两条线分别在基板中或基板上被引导，并且连接到至少两个不同的外部壳体触点（E4，E2）。

公开(公告)号：US20100102901A1

公开(公告)日：2010-04-29

申请号：US12587818

申请日：2009-10-14

申请人： Tadaaki Tsuda

发明人： Tadaaki Tsuda

IPC分类号： H03H9/64

CPC分类号： H03H9/14547 ,  H03H9/02716 ,  H03H9/14558 ,  H03H9/14561 ,  H03H9/14564 ,  H03H9/14567 ,  H03H9/643 ,  H03H9/6493

摘要： To provide an elastic wave filter capable of obtaining steep attenuation at a high band side or a low band side in a pass band and having high selectivity.An elastic wave filter is configured in a manner that when seen in a propagation direction of an elastic wave, as for respective electrode fingers composing each group of electrode fingers in an input side tapered IDT electrode and an output side tapered IDT electrode, width dimensions thereof are the same one another, and a distance dimension between the adjacent electrode fingers is formed to be the same as the width dimension of the electrode finger, when seen in the propagation direction of an elastic wave, as for a group of electrode fingers in a grating reflector, width dimensions of respective electrode fingers composing the group of the electrode fingers are the same, and a distance dimension between the adjacent electrode fingers is formed to be the same as the width dimension, and the width dimension of the electrode finger and the distance dimension between the electrode fingers are set to be equal to or less than a minimum value or equal to or more than a maximum value of the width dimension of the electrode finger and the distance dimension between the electrode fingers in the input side tapered IDT electrode and the output side tapered IDT electrode.

摘要翻译： 提供能够在通带中在高频带侧或低频带侧获得陡峭衰减并且具有高选择性的弹性波滤波器。 以弹性波的传播方向观察弹性波滤波器的结构，对于构成输入侧锥形IDT电极和输出侧锥形IDT电极中的各组电极指的各电极指，其宽度尺寸 彼此相同，并且当在弹性波的传播方向上看时，相邻电极指之间的距离尺寸形成为与电极指的宽度尺寸相同，对于一组电极指在 光栅反射器，构成电极指的组的各个电极指的宽度尺寸相同，并且相邻电极指之间的距离尺寸形成为与宽度尺寸相同，并且电极指和 电极指之间的距离尺寸被设定为等于或小于最大值的最小值或者等于或大于最大值t 电极指的宽度尺寸和输入侧锥形IDT电极和输出侧锥形IDT电极中的电极指之间的距离尺寸。