公开(公告)号：US06946931B2

公开(公告)日：2005-09-20

申请号：US10316089

申请日：2002-12-11

申请人： Shogo Inoue ,  Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata

发明人： Shogo Inoue ,  Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata

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

CPC分类号： H03H9/6436 ,  H03H9/14547 ,  H03H9/14567 ,  H03H9/1457 ,  H03H9/6483

摘要： A surface acoustic wave resonator includes a piezoelectric substrate, and a SAW resonator having an interdigital transducer. The interdigital transducer satisfies 0.15L≦W≦0.45L where W is the total of widths of all electrode fingers that form the interdigital transducer, and L is a length of the said interdigital transducer in a direction of SAW propagation.

摘要翻译： 声表面波谐振器包括压电基片和具有叉指式换能器的SAW谐振器。 叉指换能器满足0.15L <= W <= 0.45L，其中W是形成叉指换能器的所有电极指的总宽度，L是所述叉指换能器在SAW传播方向上的长度。

公开(公告)号：US06552632B2

公开(公告)日：2003-04-22

申请号：US09940888

申请日：2001-08-29

申请人： Shogo Inoue ,  Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata

发明人： Shogo Inoue ,  Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata

IPC分类号： H03H964

CPC分类号： H03H9/25 ,  H03H9/14526 ,  H03H9/6483

摘要： A surface acoustic wave resonator including at least one interdigital transducer formed on a piezoelectric substrate, wherein the at least one interdigital transducer includes a predetermined number of interdigitated electrode fingers, at least two electrode fingers among the interdigitated electrode fingers are withdrawn, and the positions of the withdrawal electrode fingers are aperiodic.

摘要翻译： 一种表面声波谐振器，其包括形成在压电基板上的至少一个叉指式换能器，其中所述至少一个叉指式换能器包括预定数量的交叉指状电极指，所述交叉指电极指中的至少两个电极指被取出， 取出电极指非周期性。

公开(公告)号：US06597261B2

公开(公告)日：2003-07-22

申请号：US09819764

申请日：2001-03-29

申请人： Jun Tsutsumi ,  Shogo Inoue ,  Takashi Matsuda ,  Osamu Ikata

发明人： Jun Tsutsumi ,  Shogo Inoue ,  Takashi Matsuda ,  Osamu Ikata

IPC分类号： H03H964

CPC分类号： H03H9/14552 ,  H03H9/6483

摘要： A surface acoustic wave filter has, on a piezoelectric substrate, surface acoustic wave resonators each composed of an interdigital transducer and reflectors disposed on both sides of the interdigital transducer. The surface acoustic wave resonators are arranged in series arms and in parallel arms to be connected in a ladder form. At least one of the surface acoustic wave resonators is replaced with an interdigital transducer that does not involve resonance in a propagation direction of a surface acoustic wave.

摘要翻译： 表面声波滤波器在压电基板上具有各自由叉指换能器和布置在叉指式换能器两侧的反射器构成的表面声波谐振器。 表面声波谐振器以串联臂和并联臂布置成梯形连接。 表面声波谐振器中的至少一个被替换为不涉及在声表面波的传播方向上的共振的叉指式换能器。

公开(公告)号：US06570471B2

公开(公告)日：2003-05-27

申请号：US09915550

申请日：2001-07-27

申请人： Shogo Inoue ,  Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata

发明人： Shogo Inoue ,  Jun Tsutsumi ,  Takashi Matsuda ,  Osamu Ikata

IPC分类号： H03H964

CPC分类号： H03H9/14505 ,  H03H9/14526 ,  H03H9/6423 ,  H03H9/6483

摘要： A surface acoustic wave filter includes a piezoelectric substrate having formed thereon plural surface acoustic wave resonators electrically connected in a ladder form for exciting a surface acoustic wave, wherein each of the surface acoustic wave resonators is composed of an interdigital transducer and reflectors arranged closely on both sides of the transducer in a direction parallel to a propagation direction of the excited surface acoustic wave; the interdigital transducer of at least one of the surface acoustic wave resonators is composed of a prescribed number of pairs of comb form electrodes; and the surface acoustic wave excited by the pairs of comb form electrodes contains two kinds of surface acoustic waves having phases that are different from each other by 180°.

摘要翻译： 表面声波滤波器包括：压电基板，其上形成有以梯形电连接以激励表面声波的多个声表面波谐振器，其中每个声表面波谐振器由交叉指型换能器和紧密配置在两者上的反射器组成 换能器的侧面在平行于被激励表面声波的传播方向的方向上; 至少一个声表面波谐振器的叉指换能器由规定数量的梳形电极对组成; 并且由梳形电极对激发的表面声波包含具有彼此相差180°的相位的两种表面声波。

公开(公告)号：US06466108B2

公开(公告)日：2002-10-15

申请号：US09771877

申请日：2001-01-30

申请人： Takashi Matsuda ,  Jun Tsutsumi ,  Shogo Inoue ,  Osamu Ikata

发明人： Takashi Matsuda ,  Jun Tsutsumi ,  Shogo Inoue ,  Osamu Ikata

IPC分类号： H03H964

CPC分类号： H03H9/14582 ,  H03H9/14552 ,  H03H9/6423 ,  H03H9/6483

摘要： A surface acoustic wave resonator includes a piezoelectric substrate having formed thereon a interdigital transducer part comprising plural electrode fingers having a period pi that is substantially equal to a wavelength of a surface acoustic wave to be excited, and at least one reflector arranged in the vicinity of the interdigital transducer part to reflect the surface acoustic wave excited by the interdigital transducer part in a direction parallel to a propagation direction of the surface acoustic wave. The interdigital transducer part has three or more electrode fingers within the period pi, and the reflector has plural gratings having a period pr that is equal to a half of a wavelength of a surface acoustic wave propagating in the reflector.

摘要翻译： 表面声波谐振器包括：压电基板，其上形成有叉指式换能器部分，其包括多个电极指，所述多个电极指具有基本上等于待激励的表面声波的波长的周期pi，以及布置在 叉指换能器部分，以反射由指数变换器部分在与声表面波的传播方向平行的方向上激发的表面声波。 叉指换能器部分在周期pi内具有三个或更多个电极指，并且反射器具有多个光栅，其周期pr等于在反射器中传播的声表面波的波长的一半。

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：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：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。