公开(公告)号：US20110006855A1

公开(公告)日：2011-01-13

申请号：US12921580

申请日：2009-03-04

申请人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

发明人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

IPC分类号： H03H7/01 ,  H01P1/20

CPC分类号： H03H9/725 ,  H03H9/0023 ,  H03H9/0038 ,  H03H9/0071 ,  H03H9/6436 ,  H03H9/6476 ,  H03H9/70

摘要： An elastic wave filter has first, second, and third IDT electrodes whose wiring electrodes are connected to unbalanced signal terminal; fourth IDT electrode disposed between the first and second IDT electrodes; fifth IDT electrode disposed between the second and third IDT electrodes; and first and second balanced signal terminals connected to the wiring electrodes of fourth and fifth IDT electrodes, respectively. The ground electrodes of the first through fifth IDT electrodes are connected to the ground. Signals in opposite phase and in phase with a signal input to unbalanced signal terminal are output from first and second balanced signal terminals, respectively. The wiring electrodes of second and third IDT electrodes are adjacent to the ground electrode of fifth IDT electrode. The wiring electrode of one of first and second IDT electrodes is adjacent to the wiring electrode of fourth IDT electrode. The ground electrode of the other is adjacent to the ground electrode of fourth IDT electrode. This configuration can suppress spuriousness in the bandpass.

摘要翻译： 弹性波滤波器具有第一，第二和第三IDT电极，其布线电极连接到不平衡信号端子; 第四IDT电极，设置在第一IDT电极和第二IDT电极之间; 设置在第二和第三IDT电极之间的第五IDT电极; 以及分别连接到第四和第五IDT电极的布线电极的第一和第二平衡信号端子。 第一至第五IDT电极的接地电极连接到地面。 分别从第一和第二平衡信号端子输出与信号输入到不平衡信号端的反相和同相的信号。 第二IDT电极和第三IDT电极的布线电极与第五IDT电极的接地电极相邻。 第一IDT电极和第二IDT电极之一的布线电极与第四IDT电极的布线电极相邻。 另一个的接地电极与第四IDT电极的接地电极相邻。 该配置可以抑制带通中的杂散。

公开(公告)号：US20100194496A1

公开(公告)日：2010-08-05

申请号：US12757475

申请日：2010-04-09

申请人： Rei Goto ,  Yosuke Hamaoka ,  Hiroyuki Nakamura ,  Tetsuya Tsurunari ,  Joji Fujiwara

发明人： Rei Goto ,  Yosuke Hamaoka ,  Hiroyuki Nakamura ,  Tetsuya Tsurunari ,  Joji Fujiwara

IPC分类号： H01P5/12 ,  H03H9/17

CPC分类号： H03H9/6483 ,  H03H9/0071 ,  H03H9/02944 ,  H03H9/6496

摘要： An acoustic wave resonance device includes: piezoelectric substrate (1), first acoustic wave resonator (100) provided on an upper surface of piezoelectric substrate (1) and including first interdigital transducer electrode (110), and second acoustic wave resonator (200) provided on piezoelectric substrate (1) and including second interdigital transducer electrode (210). First acoustic wave resonator (100) and second acoustic wave resonator (200) are connected to each other. An overlap width of a plurality of first comb-shaped electrodes (112) forming first acoustic wave resonator (100) is larger than an overlap width of a plurality of second comb-shaped electrodes (212) forming second acoustic wave resonator (200). With such a configuration, frequencies in which a transverse mode spurious response is generated can be distributed and loss can be reduced.

摘要翻译： 声波共振装置包括：压电基板（1），设置在压电基板（1）的上表面上并包括第一叉指式换能器电极（110）的第一声波谐振器（100）和设置在第二声波谐振器 在压电基板（1）上并且包括第二叉指式换能器电极（210）。 第一声​​波谐振器（100）和第二声波谐振器（200）彼此连接。 形成第一声波谐振器（100）的多个第一梳状电极（112）的重叠宽度大于形成第二声波谐振器（200）的多个第二梳状电极（212）的重叠宽度。 通过这样的配置，可以分配产生横向模式杂散响应的频率，并且可以减少损耗。

公开(公告)号：US09041486B2

公开(公告)日：2015-05-26

申请号：US13378129

申请日：2010-06-15

申请人： Tetsuya Tsurunari ,  Rei Goto ,  Hiroyuki Nakamura

发明人： Tetsuya Tsurunari ,  Rei Goto ,  Hiroyuki Nakamura

IPC分类号： H03H9/72 ,  H03H9/64 ,  H03H9/02

CPC分类号： H03H9/6483 ,  H03H9/02834 ,  H03H9/02944 ,  H03H9/725

摘要： An object of the present invention is to improve the passing characteristic at high temperature in a ladder-type elastic wave filter and a duplexer including the filter. The ladder-type elastic wave filter of the present invention includes a piezoelectric substrate, a first series elastic-wave resonator formed on the piezoelectric substrate and connected in series between the input and output terminals of the filter, a parallel elastic-wave resonator formed on the piezoelectric substrate and connected in parallel between the series elastic-wave resonator and the ground terminal, and a dielectric film formed on the piezoelectric substrate so as to cover the first series elastic-wave resonator. The piezoelectric substrate is formed of a material with a negative temperature coefficient. The dielectric film is formed of a material with a positive temperature coefficient and its film thickness is formed thicker than that with which the frequency-temperature coefficient of the first series elastic-wave resonator becomes 0.

摘要翻译： 本发明的目的是提高梯型弹性波滤波器和包括滤波器的双工器在高温下的通过特性。 本发明的梯形弹性波滤波器包括：压电基板，形成在压电基板上的第一串联弹性波谐振器，并串联连接在滤波器的输入和输出端子之间;平行弹性波谐振器，形成在 所述压电基板并联在所述串联弹性波谐振器和所述接地端子之间，以及形成在所述压电基板上以覆盖所述第一串联弹性波谐振器的电介质膜。 压电基板由具有负温度系数的材料形成。 电介质膜由具有正温度系数的材料形成，并且其膜厚形成得比第一串联弹性波谐振器的频率 - 温度系数变为0的厚度厚。

公开(公告)号：US08482363B2

公开(公告)日：2013-07-09

申请号：US12878104

申请日：2010-09-09

申请人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

发明人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

IPC分类号： H03H9/72 ,  H03H9/64

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

摘要： A surface acoustic wave (SAW) filter device includes an input port for receiving an unbalanced signal, a pair of input/output ports, a first SAW filter for receiving the unbalanced signal from the input port and outputting balanced signals to the pair of input/output ports, a second SAW filter for receiving the balanced signals output from the pair of input/output ports and outputting balanced signals, and a pair of output ports for outputting the balanced signals output from the second SAW filter. The first SAW filter includes a first longitudinally-coupled SAW resonator having a first unbalanced signal input port and first and second balanced signal output ports, and a second longitudinally-coupled SAW resonator having a second unbalanced signal input port and third and fourth balanced signal output port. The first and second unbalanced signal input ports are electrically connected to the input port. The first and third balanced signal output ports both are electrically connected to one of the pair of input/output ports. The second and fourth balanced signal output ports both are electrically connected to another of the pair of input/output ports. This SAW filter device can suppress spurious and has a small insertion loss.

摘要翻译： 表面声波（SAW）滤波器装置包括用于接收不平衡信号的输入端口，一对输入/输出端口，用于从输入端口接收不平衡信号的第一SAW滤波器，并将平衡信号输出到输入/ 输出端口，第二SAW滤波器，用于接收从一对输入/输出端口输出的平衡信号并输出​​平衡信号;以及一对输出端口，用于输出从第二SAW滤波器输出的平衡信号。 第一SAW滤波器包括具有第一不平衡信号输入端口和第一和第二平衡信号输出端口的第一纵向耦合SAW谐振器，以及具有第二不平衡信号输入端口和第三和第四平衡信号输出端的第二纵向耦合SAW谐振器 港口。 第一和第二不平衡信号输入端口电连接到输入端口。 第一和第三平衡信号输出端口都电连接到一对输入/输出端口中。 第二和第四平衡信号输出端口都电连接到该对输入/输出端口中的另一个。 该SAW滤波器装置可以抑制杂散并具有小的插入损耗。

公开(公告)号：US08384495B2

公开(公告)日：2013-02-26

申请号：US12993893

申请日：2009-05-14

申请人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

发明人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

IPC分类号： H03H9/72 ,  H03H9/64

CPC分类号： H03H9/725 ,  H03H9/14597

摘要： An acoustic wave duplexer includes a piezoelectric substrate, a first filter and a second filter whose center frequency is higher than that of the first filter, the first and second filters being provided on the piezoelectric substrate. The first filter is structured as a ladder type. A resonator positioned nearest to an antenna terminal out of series-arm resonators is designated as a first resonator. A pitch of a comb-shaped electrode structuring the first resonator is set such that a bulk wave emission frequency of the first resonator becomes higher than a passband of the second filter.

摘要翻译： 声波双工器包括压电基板，第一滤波器和中心频率高于第一滤波器的第二滤波器，第一和第二滤波器设置在压电基板上。 第一个滤波器被构造为梯形图。 最靠近串联臂谐振器的天线端子的谐振器被指定为第一谐振器。 构成第一谐振器的梳状电极的间距被设定为使得第一谐振器的体波发射频率高于第二滤波器的通带。

公开(公告)号：US08704612B2

公开(公告)日：2014-04-22

申请号：US13319578

申请日：2010-05-10

申请人： Tetsuya Tsurunari ,  Rei Goto ,  Hiroyuki Nakamura

发明人： Tetsuya Tsurunari ,  Rei Goto ,  Hiroyuki Nakamura

IPC分类号： H03H9/00 ,  H03H9/64

CPC分类号： H03H9/725 ,  H03H9/0071

摘要： The antenna sharing device has a first elastic-wave filter for passing signals of a first frequency passband and a second elastic-wave filter for passing signals of a second frequency passband higher than the first frequency passband. The first elastic-wave filter is a ladder-type filter including a first series resonator and a second series resonator having an antiresonant frequency point higher than that of the first series resonator. The first series resonator has a first IDT electrode and a first dielectric film covering the electrode. The second series resonator has a second IDT electrode and a second dielectric film covering the electrode. The first and the second dielectric films have a first projection and a second projection, respectively, so as to be formed above the electrode fingers of each IDT electrode. The cross-sectional area of the first projection of the first series resonator is larger than that of the second projection of the second series resonator in the excitation direction of the elastic wave. The structure satisfies both of steepness in a crossband and low loss in a passband.

摘要翻译： 天线共用装置具有用于通过第一频带和第二弹性波滤波器的信号的第一弹性波滤波器，用于通过高于第一频带的第二频带的信号。 第一弹性波滤波器是包括第一串联谐振器和具有比第一串联谐振器的反谐振频率点高的反谐振频率点的第二串联谐振器的梯型滤波器。 第一串联谐振器具有第一IDT电极和覆盖电极的第一电介质膜。 第二串联谐振器具有覆盖电极的第二IDT电极和第二电介质膜。 第一和第二电介质膜分别具有第一突起和第二突起，以形成在每个IDT电极的电极指的上方。 第一串联谐振器的第一突起的横截面积大于弹性波的激励方向上的第二串联谐振器的第二突起的截面面积。 该结构满足通带中的陡度和通带中的低损耗。

公开(公告)号：US20120086521A1

公开(公告)日：2012-04-12

申请号：US13378129

申请日：2010-06-15

申请人： Tetsuya Tsurunari ,  Rei Goto ,  Hiroyuki Nakamura

发明人： Tetsuya Tsurunari ,  Rei Goto ,  Hiroyuki Nakamura

IPC分类号： H03H9/72 ,  H03H9/64

CPC分类号： H03H9/6483 ,  H03H9/02834 ,  H03H9/02944 ,  H03H9/725

摘要： An object of the present invention is to improve the passing characteristic at high temperature in a ladder-type elastic wave filter and a duplexer including the filter. The ladder-type elastic wave filter of the present invention includes a piezoelectric substrate, a first series elastic-wave resonator formed on the piezoelectric substrate and connected in series between the input and output terminals of the filter, a parallel elastic-wave resonator formed on the piezoelectric substrate and connected in parallel between the series elastic-wave resonator and the ground terminal, and a dielectric film formed on the piezoelectric substrate so as to cover the first series elastic-wave resonator. The piezoelectric substrate is formed of a material with a negative temperature coefficient. The dielectric film is formed of a material with a positive temperature coefficient and its film thickness is formed thicker than that with which the frequency-temperature coefficient of the first series elastic-wave resonator becomes 0.

摘要翻译： 本发明的目的是提高梯型弹性波滤波器和包括滤波器的双工器在高温下的通过特性。 本发明的梯形弹性波滤波器包括：压电基板，形成在压电基板上的第一串联弹性波谐振器，并串联连接在滤波器的输入和输出端子之间;平行弹性波谐振器，形成在 所述压电基板并联在所述串联弹性波谐振器和所述接地端子之间，以及形成在所述压电基板上以覆盖所述第一串联弹性波谐振器的电介质膜。 压电基板由具有负温度系数的材料形成。 电介质膜由具有正温度系数的材料形成，并且其膜厚形成得比第一串联弹性波谐振器的频率 - 温度系数变为0的厚度厚。

公开(公告)号：US20110095845A1

公开(公告)日：2011-04-28

申请号：US12993893

申请日：2009-05-14

申请人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

发明人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

IPC分类号： H03H9/17 ,  H03H9/25

CPC分类号： H03H9/725 ,  H03H9/14597

摘要： An acoustic wave duplexer includes a piezoelectric substrate, a first filter and a second filter whose center frequency is higher than that of the first filter, the first and second filters being provided on the piezoelectric substrate. The first filter is structured as a ladder type. A resonator positioned nearest to an antenna terminal out of series-arm resonators is designated as a first resonator. A pitch of a comb-shaped electrode structuring the first resonator is set such that a bulk wave emission frequency of the first resonator becomes higher than a passband of the second filter.

摘要翻译： 声波双工器包括压电基板，第一滤波器和中心频率高于第一滤波器的第二滤波器，第一和第二滤波器设置在压电基板上。 第一个滤波器被构造为梯形图。 最靠近串联臂谐振器的天线端子的谐振器被指定为第一谐振器。 构成第一谐振器的梳状电极的间距被设定为使得第一谐振器的体波发射频率高于第二滤波器的通带。

公开(公告)号：US08598968B2

公开(公告)日：2013-12-03

申请号：US13124685

申请日：2009-11-06

申请人： Koji Seo ,  Hiroyuki Nakamura ,  Rei Goto

发明人： Koji Seo ,  Hiroyuki Nakamura ,  Rei Goto

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

CPC分类号： H03H9/0222 ,  H03H9/02818

摘要： An elastic wave device has a convex portion on the top face of a first dielectric layer over an IDT electrode when the elastic wave device has a structure of a boundary wave device in which a film thickness of a second dielectric layer is not less than 1.6 times as much as a pitch width of the IDT electrode. This convex portion increases an electromechanical coupling coefficient of SH wave that is the major wave. Accordingly, good filter characteristics can be easily achieved.

摘要翻译： 当弹性波装置具有其中第二电介质层的膜厚度不小于1.6倍的边界波装置的结构时，弹性波装置在IDT电极上的第一电介质层的顶面上具有凸起部分 与IDT电极的间距宽度一样多。 该凸部增加作为主波的SH波的机电耦合系数。 因此，可以容易地实现良好的过滤器特性。

公开(公告)号：US08427259B2

公开(公告)日：2013-04-23

申请号：US12921580

申请日：2009-03-04

申请人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

发明人： Joji Fujiwara ,  Tetsuya Tsurunari ,  Hiroyuki Nakamura ,  Rei Goto

IPC分类号： H03H9/64

CPC分类号： H03H9/725 ,  H03H9/0023 ,  H03H9/0038 ,  H03H9/0071 ,  H03H9/6436 ,  H03H9/6476 ,  H03H9/70

摘要： An elastic wave filter has first, second, and third IDT electrodes whose wiring electrodes are connected to unbalanced signal terminal; fourth IDT electrode disposed between the first and second IDT electrodes; fifth IDT electrode disposed between the second and third IDT electrodes; and first and second balanced signal terminals connected to the wiring electrodes of fourth and fifth IDT electrodes, respectively. The ground electrodes of the first through fifth IDT electrodes are connected to the ground. Signals in opposite phase and in phase with a signal input to unbalanced signal terminal are output from first and second balanced signal terminals, respectively. The wiring electrodes of second and third IDT electrodes are adjacent to the ground electrode of fifth IDT electrode. The wiring electrode of one of first and second IDT electrodes is adjacent to the wiring electrode of fourth IDT electrode. The ground electrode of the other is adjacent to the ground electrode of fourth IDT electrode. This configuration can suppress spuriousness in the bandpass.

摘要翻译： 弹性波滤波器具有第一，第二和第三IDT电极，其布线电极连接到不平衡信号端子; 第四IDT电极，设置在第一IDT电极和第二IDT电极之间; 设置在第二和第三IDT电极之间的第五IDT电极; 以及分别连接到第四和第五IDT电极的布线电极的第一和第二平衡信号端子。 第一至第五IDT电极的接地电极连接到地面。 分别从第一和第二平衡信号端子输出与信号输入到不平衡信号端的反相和同相的信号。 第二IDT电极和第三IDT电极的布线电极与第五IDT电极的接地电极相邻。 第一IDT电极和第二IDT电极之一的布线电极与第四IDT电极的布线电极相邻。 另一个的接地电极与第四IDT电极的接地电极相邻。 该配置可以抑制带通中的杂散。