公开(公告)号：US06359368B1

公开(公告)日：2002-03-19

申请号：US09628276

申请日：2000-07-28

申请人： Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata ,  Yoshio Satoh

发明人： Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata ,  Yoshio Satoh

IPC分类号： H01L4108

CPC分类号： H03H9/02771

摘要： A surface acoustic wave reflector includes a piezoelectric substrate and a plurality of perturbation members arranged at a first period on the piezoelectric substrate. A plurality of free-surface regions where no perturbation members exist are formed in an arrangement of the perturbation members.

摘要翻译： 表面声波反射器包括压电基片和在压电基片上以第一周期布置的多个扰动元件。 在扰动构件的布置中形成多个不存在扰动构件的自由表面区域。

公开(公告)号：US06121860A

公开(公告)日：2000-09-19

申请号：US831332

申请日：1997-03-31

申请人： Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

发明人： Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

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

CPC分类号： H03H9/6479 ,  H03H9/0028 ,  H03H9/643 ,  H03H9/6463

摘要： The multimode surface acoustic wave filter includes two surface acoustic wave resonators closely arranged on a piezoelectric substrate in a direction perpendicular to the propagation direction of surface acoustic waves and acoustically coupled by a coupling section, each of the surface acoustic wave resonators including an interdigital transducer and two reflectors disposed closely on both sides of the interdigital transducer in a direction parallel to the propagation direction of the surface acoustic waves, the interdigital transducer having an excitation section for exciting the surface acoustic waves and a signal terminal section for inputting an electric signal, each of the reflectors having a grating section and a terminal section, wherein the velocity of surface acoustic waves propagating through the coupling section is a little larger than the velocity of the surface acoustic waves propagating through the excitation section of the interdigital transducer.

摘要翻译： 多模声表面波滤波器包括两个表面声波谐振器，其紧密地布置在压电基片上，在与声表面波的传播方向垂直的方向上，并由耦合部分声学耦合，每个声表面波谐振器包括一指叉式换能器和 两个反射器在平行于表面声波的传播方向的方向上紧密地布置在叉指式换能器的两侧上，叉指换能器具有用于激励表面声波的激励部分和用于输入电信号的信号端子部分 具有光栅部分和端子部分的反射器，其中通过耦合部分传播的表面声波的速度比通过叉指换能器的激励部分传播的表面声波的速度稍大。

公开(公告)号：US6075426A

公开(公告)日：2000-06-13

申请号：US153336

申请日：1998-09-15

申请人： Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata ,  Yoshio Satoh

发明人： Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata ,  Yoshio Satoh

IPC分类号： H03H9/145 ,  H03H9/64

CPC分类号： H03H9/14552 ,  H03H9/6426

摘要： A surface acoustic wave device includes a piezoelectric substrate and plural IDTs for sending and receiving SAW mounted on the substrate. At least one of the IDTs includes a positive electrode including plural positive split electrodes (PSEs) and a negative electrode including plural negative split electrodes (NSEs). The PSEs and NSEs are arranged alternately. Each of the PSEs andNSEs has apair of electrode fingers. Two electrode fingers of each of the split electrodes are different in width in a direction in which a SAW is excited. An angle .alpha. determined by a direction transverse to the electrode fingers from one of the two electrode fingers having a smaller reflection factor toward the other one having a larger reflection factor and a direction in which the SAW excited by the IDT including the split electrodes travels to one of the IDTs for receiving the SAW is equal to or larger than 0.degree. and smaller than 90.degree., i.e., 0.ltoreq..alpha.

摘要翻译： 表面声波装置包括压电基板和用于发送和接收安装在基板上的SAW的多个IDT。 IDT中的至少一个包括包括多个正分裂电极（PSE）的正电极和包括多个负分离电极（NSE）的负电极。 PSEs和NSEs交替排列。 每个PSE和NSE都有电极指的孔。 每个分离电极的两个电极指在SAW被激发的方向上的宽度不同。 由横向于电极指的方向由具有较小反射系数的两个电极指的另一个具有较大反射系数的方向确定的角度α和由包括分离电极的IDT激发的SAW的方向传播到 用于接收SAW的IDT之一等于或大于0°并小于90°，​​即0 <α<90°。

公开(公告)号：US6023204A

公开(公告)日：2000-02-08

申请号：US153335

申请日：1998-09-15

申请人： Osamu Ikata ,  Yoshio Satoh ,  Takashi Matsuda ,  Jun Tsutsumi ,  Satoshi Miyamoto

发明人： Osamu Ikata ,  Yoshio Satoh ,  Takashi Matsuda ,  Jun Tsutsumi ,  Satoshi Miyamoto

IPC分类号： H03H9/25 ,  H03H9/05 ,  H03H9/64 ,  H03H9/10

CPC分类号： H03H9/1071 ,  H03H2250/00

摘要： A surface acoustic wave device includes a plurality of surface acoustic wave filter chips having external connection terminals and a package accommodating the plural surface acoustic wave filter chips. The package is provided with a plurality of terminals for connection with the surface acoustic wave filter chips, and one of the external connection terminals of a first one of the surface acoustic wave filter chips is connected with one of the terminals of the package via a second one of the surface acoustic wave filter chips.

摘要翻译： 表面声波装置包括具有外部连接端子的多个表面声波滤波器芯片和容纳多个表面声波滤波器芯片的封装。 该封装设置有多个用于与表面声波滤波器芯片连接的端子，并且第一个声表面波滤波器芯片的外部连接端子中的一个外部连接端子通过第二个 一个声表面波滤波芯片。

公开(公告)号：US5999068A

公开(公告)日：1999-12-07

申请号：US041784

申请日：1998-03-13

申请人： Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

发明人： Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

IPC分类号： H03H9/145 ,  H03H9/25 ,  H03H9/64

CPC分类号： H03H9/6433 ,  H03H9/14567 ,  H03H9/1457 ,  H03H9/6459 ,  H03H9/6463 ,  H03H2250/00 ,  H03H9/14547

摘要： A surface acoustic wave filter of multi-stage connection type including a plurality of surface acoustic wave filters formed on a piezoelectric substrate and a connection section for electrically connecting the surface acoustic wave filters in a cascade connection. Each of the surface acoustic wave filters includes interdigital transducers with two signal terminals for electric input and output, each interdigital transducer including an excitation section for exciting a surface acoustic wave and two terminal sections disposed on opposite sides of the excitation section, the two terminal sections serving as input or output terminal for electric signal and ground terminal. One of the signal terminal sections is connected to the connection section, and an electrode area of said one of the signal terminal sections is adjusted so that a parasitic capacitance formed between said one of the signal terminal sections and a grounding point of the surface acoustic wave filter is less than or equal to 0.01 pF.

摘要翻译： 一种多级连接型表面声波滤波器，包括形成在压电基片上的多个声表面波滤波器和用于电连接级联连接声表面波滤波器的连接部分。 每个表面声波滤波器包括具有两个用于电输入和输出的信号端子的叉指式换能器，每个叉指式换能器包括用于激发表面声波的激励部分和设置在激励部分的相对侧上的两个端子部分，两个端子部分 作为电信号和接地端子的输入或输出端子。 信号端子部分中的一个连接到连接部分，并且调节所述信号端子部分中的一个的电极区域，使得在所述信号端子部分之间形成的寄生电容和表面声波的接地点 过滤器小于或等于0.01 pF。

公开(公告)号：US06577210B1

公开(公告)日：2003-06-10

申请号：US09659592

申请日：2000-09-11

申请人： Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata ,  Yoshio Satoh

发明人： Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata ,  Yoshio Satoh

IPC分类号： H03H964

CPC分类号： H03H9/64

摘要： The present invention relates to a surface acoustic wave filter which is characterized in that it includes a piezoelectric substrate, a plurality of surface acoustic wave propagation paths arranged in parallel on the piezoelectric substrate and a coupler for coupling the surface acoustic wave propagation paths, an input interdigital transducer and a first reflector are disposed on at least one of the surface acoustic wave propagation paths with intervention of the coupler, and an output interdigital transducer and a second reflector are disposed on at least one of the other surface acoustic wave propagation paths with intervention of the coupler. This construction can reduce the length of the surface acoustic wave filter in a surface acoustic wave propagation direction and can improve the shape factor of a frequency characteristic curve.

摘要翻译： 声表面波滤波器技术领域本发明涉及一种声表面波滤波器，其特征在于，它包括压电基片，压电基片上平行布置的多个表面声波传播路径和用于耦合表面声波传播路径的耦合器，输入 叉指换能器和第一反射器通过耦合器的介入设置在表面声波传播路径中的至少一个上，并且输出叉指式换能器和第二反射器设置在至少一个其它表面声波传播路径上，并具有干预 的耦合器。 这种结构可以降低表面声波滤波器在表面声波传播方向上的长度，并且可以改善频率特性曲线的形状因子。

公开(公告)号：US06525629B2

公开(公告)日：2003-02-25

申请号：US09725140

申请日：2000-11-29

申请人： Takashi Matsuda ,  Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

发明人： Takashi Matsuda ,  Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

IPC分类号： H03H964

CPC分类号： H03H9/0285 ,  H03H9/02748 ,  H03H9/14547 ,  H03H9/14552 ,  H03H9/14564 ,  H03H9/6453 ,  H03H9/6476

摘要： A surface acoustic wave filter including a piezoelectric substrate, an exciting electrode formed on the piezoelectric substrate and exciting a surface acoustic wave, and a receiving electrode receiving the surface acoustic wave. Both the exciting and receiving electrodes are provided with interdigital electrode fingers having a period p. One of the exciting and receiving electrodes is constructed of a plurality of interdigital electrode sub-units having substantially the same electrode surface areas occupied by interdigital electrode fingers. The interdigital electrode sub-units are disposed in a direction perpendicular to a propagation direction of the excited surface acoustic wave and have a positional relation such that the interdigital electrode sub-units are offset from each other by (n±¼)p, wherein n is an integer, in a direction parallel to the propagation direction of the surface acoustic wave.

摘要翻译： 一种表面声波滤波器，包括压电基板，形成在压电基板上的激励电极和激励表面声波，以及接收声表面波的接收电极。 励磁接收电极和接收电极都设有具有周期p的叉指电极指。 励磁和接收电极之一由多个叉指电极子单元构成，其具有由叉指电极指所占据的基本上相同的电极表面积。 叉指电极子单元配置在与激励声表面波的传播方向正交的方向上，具有使指数间电极子单元彼此偏移（n±¼）p的位置关系，其中n 是平行于表面声波的传播方向的整数。

公开(公告)号：US6114927A

公开(公告)日：2000-09-05

申请号：US172239

申请日：1998-10-14

申请人： Takashi Matsuda ,  Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

发明人： Takashi Matsuda ,  Jun Tsutsumi ,  Osamu Ikata ,  Yoshio Satoh

IPC分类号： H03H9/145 ,  H03H9/25 ,  H03H9/64

CPC分类号： H03H9/1452 ,  H03H9/14526 ,  H03H9/6423

摘要： A surface acoustic wave filter includes a piezoelectric substrate, input and output IDTs, and first and second direction changing electrodes, wherein at least one of the input and output IDTs includes a weighted interdigital transducer, the input and output IDTS being arranged in a direction perpendicular to a propagation direction of a surface acoustic wave (SAW) oscillated by the input IDT. The first direction changing electrode changes the propagation direction of the SAW, which has propagated in a left directed from the input IDT, into a direction towards the output IDT. The second direction changing electrode changes the propagation direction of the SAW, which has propagated in a right direction from the input IDT, into a direction towards the output IDTs and the first and second direction changing electrodes is set for obtaining at the output IDT the SAW having desired frequency characteristics.

摘要翻译： 表面声波滤波器包括压电基板，输入和输出IDT以及第一和第二方向改变电极，其中输入和输出IDT中的至少一个包括加权叉指换能器，输入和输出IDTS沿垂直方向排列 到由输入IDT振荡的表面声波（SAW）的传播方向。 第一方向改变电极将从输入IDT引导的左侧传播的SAW的传播方向改变成朝向输出IDT的方向。 第二方向改变电极将已经从输入IDT向右传播的SAW的传播方向改变成朝向输出IDT的方向，并且设置第一和第二方向改变电极以在输出IDT处获得SAW 具有期望的频率特性。

公开(公告)号：USRE37375E1

公开(公告)日：2001-09-18

申请号：US09158074

申请日：1998-09-22

申请人： Yoshio Satoh ,  Osamu Ikata ,  Tsutomu Miyashita ,  Takashi Matsuda ,  Mitsuo Takamatsu

发明人： Yoshio Satoh ,  Osamu Ikata ,  Tsutomu Miyashita ,  Takashi Matsuda ,  Mitsuo Takamatsu

IPC分类号： H03H964

CPC分类号： H03H9/6436 ,  H03H9/0576 ,  H03H9/1071 ,  H03H9/6433 ,  H03H9/6483 ,  H03H9/72 ,  H03H9/725 ,  H03H2250/00

摘要： A SAW filter includes a first SAW resonator having a pair of terminals and a predetermined resonance frequency (frp), the first SAW resonator being provided in a parallel arm of the SAW filter. A second SAW resonator has a pair of terminals and a predetermined resonance frequency (frs) approximately equal to a predetermined antiresonance frequency of the first SAW resonator (fap). The second SAW resonator is provided in a series arm of the SAW filter. An inductance element is connected in series to the first SAW resonator.

摘要翻译： SAW滤波器包括具有一对端子和预定谐振频率（frp）的第一SAW谐振器，第一SAW谐振器设置在SAW滤波器的并联臂中。 第二SAW谐振器具有大约等于第一SAW谐振器（fap）的预定反谐振频率的一对端子和预定谐振频率（frs）。 第二SAW谐振器设置在SAW滤波器的串联臂中。 电感元件与第一SAW谐振器串联连接。

公开(公告)号：US5874866A

公开(公告)日：1999-02-23

申请号：US937380

申请日：1997-09-25

申请人： Yoshio Satoh ,  Osamu Ikata ,  Takashi Matsuda ,  Yoshitaka Takahashi ,  Ivan Dimitrov Avramov

发明人： Yoshio Satoh ,  Osamu Ikata ,  Takashi Matsuda ,  Yoshitaka Takahashi ,  Ivan Dimitrov Avramov

IPC分类号： H03B5/30 ,  H03B5/32 ,  H03H9/25 ,  H03H9/64

CPC分类号： H03H9/6483 ,  H03B5/326

摘要： An oscillation circuit of phase-shift type includes a surface acoustic wave filter in a feedback circuit, the surface acoustic wave filter having first and second one-port surface acoustic wave resonators of different resonance frequencies connected in a ladder configuration. The oscillation circuit has a high C/N ratio with a large bandwidth of variable frequency and can be fabricated in a small size with low costs.

摘要翻译： 相移型振荡电路包括反馈电路中的表面声波滤波器，该声表面波滤波器具有以梯形结构连接的具有不同谐振频率的第一和第二单端口声表面波谐振器。 振荡电路具有高C / N比，具有可变频率的大带宽，并且可以以低成本制造成小尺寸。