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21. 发明授权

US06476691B1 Surface acoustic wave filter 有权
标题翻译：表面声波滤波器
公开(公告)号：US06476691B1
公开(公告)日：2002-11-05
申请号：US09762025
申请日：2001-04-06
申请人： Shigeru Tsuzuki , Tsutomu Igaki , Ken Matsunami , Kazunori Nishimura , Hiroyuki Nakamura , Toru Yamada
发明人： Shigeru Tsuzuki , Tsutomu Igaki , Ken Matsunami , Kazunori Nishimura , Hiroyuki Nakamura , Toru Yamada
IPC分类号： H03H964
CPC分类号： H03H9/6433 , H03H9/0076 , H03H9/02637 , H03H9/14505 , H03H9/14529 , H03H9/14538 , H03H9/14552
摘要： A SAW filter comprising a piezoelectric substrate and at least two filter tracks formed on the substrate, each having at least two IDT electrodes for input and output. The two filter tracks have substantially the same phase within a pass band, while it is substantially inverse-phased outside the pass band. For realizing the above-described conditions, input IDT electrode of one filter track is connected in parallel with input IDT electrode of the other filter track, while output IDT electrode of one filter track is connected in parallel with output IDT electrode of the other filter track. Furthermore, frequency values of said two filter tracks substantially coincide at a point 3 dB lower from the peak transfer function value. Thus the above-configured SAW filter of the present invention is smaller in the overall size and offers a broad pass band and a steep attenuation characteristic.
摘要翻译：一种SAW滤波器，包括压电衬底和形成在衬底上的至少两个滤波器轨道，每个滤波器轨道具有用于输入和输出的至少两个IDT电极。两个滤波器轨道在通带内具有基本上相同的相位，而在通带外部基本上是反相的。为了实现上述条件，一个滤波器轨道的输入IDT电极并联连接到另一滤波器轨道的输入IDT电极，而一个滤波器轨道的输出IDT电极与另一滤波器轨迹的输出IDT电极并联连接。此外，所述两个滤波器轨道的频率值基本上与从峰值传递函数值降低3dB的点相重合。因此，本发明的上述配置的SAW滤波器的总体尺寸较小，并且具有宽的通带和陡峭的衰减特性。

22. 发明授权

US06351196B1 Surface acoustic wave filter and multistage surface acoustic wave filter 有权
标题翻译：表面声波滤波器和多级表面声波滤波器
公开(公告)号：US06351196B1
公开(公告)日：2002-02-26
申请号：US09390653
申请日：1999-09-07
申请人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Toshio Ishizaki
发明人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Toshio Ishizaki
IPC分类号： H03H964
CPC分类号： H03H9/6443 , H03H9/0028 , H03H9/02763 , H03H9/02913 , H03H9/02992 , H03H9/14588 , H03H9/14597 , H03H9/6463 , H03H9/6479
摘要： Disclosed is a surface acoustic wave filter on a piezoelectric substrate. The filter includes at least two surface acoustic wave resonators that each has a reflector electrode on both sides of an IDT electrode as an inter-digital transducer electrode. At least two of the resonators are disposed on a piezoelectric substrate in positions near each other so that the propagation direction of surface acoustic waves are in parallel to make an acoustic coupling. In an embodiment, the acoustic coupling is a direct coupling. The IDT electrode has a plurality of electrode fingers connected so as not to cancel respective electric charges. The IDT electrode is constituted by at least three divisional IDT electrodes. A pair of the electrode fingers can have a reverse phase relation with respect to each other. Also, in a multi-stage surface acoustic wave filter, the electrode fingers can be included in an upper IDT electrode of a top stage of the filter, and in a lower IDT electrode of a bottom stage of such filter.
摘要翻译：公开了压电基板上的表面声波滤波器。滤波器包括至少两个表面声波谐振器，每个表面声波谐振器在IDT电极的两侧上具有作为数字间换能器电极的反射器电极。至少两个谐振器在彼此相邻的位置处设置在压电基板上，使得声表面波的传播方向平行以形成声耦合。在一个实施例中，声耦合是直接耦合。 IDT电极具有连接成不抵消各自的电荷的多个电极指。 IDT电极由至少三个分开的IDT电极构成。一对电极指可以相对于彼此具有反相位关系。此外，在多级表面声波滤波器中，电极指可以包括在过滤器的顶级的上部IDT电极中，并且可以包括在该过滤器的底部的下部IDT电极中。

23. 发明授权

US06348845B2 Surface acoustic wave filter and multistage surface acoustic wave filter 有权
标题翻译：表面声波滤波器和多级表面声波滤波器
公开(公告)号：US06348845B2
公开(公告)日：2002-02-19
申请号：US09794035
申请日：2001-02-28
申请人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Toshio Ishizaki
发明人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Toshio Ishizaki
IPC分类号： H03H964
CPC分类号： H03H9/6479 , H03H9/0028 , H03H9/02763 , H03H9/02913 , H03H9/02992 , H03H9/14588 , H03H9/14597 , H03H9/6443 , H03H9/6463
摘要： A surface acoustic wave resonator is constituted by an IDT electrode and reflector electrodes disposed on both sides thereof, on a piezoelectric substrate. Two of said surface acoustic wave resonators are disposed nearby so that the propagation directions of the respective surface acoustic waves are in parallel to each other to make acoustic couple to constitute a surface acoustic wave filter having plural exciting modes with different propagation frequencies. The bus bar electrodes of each of two IDT electrodes are electrically separated from each other, and the leading out electrodes led out from at least two spots on those bus bar electrodes are electrically connected to each other, by which one side of the balanced input and output terminal. As a result, the electrode resistance of the IDT electrode is alleviated to make the insertion loss less.
摘要翻译：表面声波谐振器由压电基板上的IDT电极和设置在其两侧的反射器电极构成。两个所述表面声波谐振器被设置在附近，使得各声表面波的传播方向彼此平行，以使声耦合构成具有不同传播频率的多个激励模式的表面声波滤波器。两个IDT电极中的每一个的汇流条电极彼此电分离，并且从那些汇流条电极上的至少两个点引出的引出电极彼此电连接，平衡输入的一侧和输出端子。结果，减轻了IDT电极的电极电阻，使插入损耗减小。

24. 发明授权

US5990762A Surface acoustic wave filter and multistage filter with multiple inside busbar lead-out electrodes 失效
标题翻译：表面声波滤波器和具有多个内部母线引出电极的多级滤波器
公开(公告)号：US5990762A
公开(公告)日：1999-11-23
申请号：US862383
申请日：1997-05-23
申请人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Toshio Ishizaki
发明人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Toshio Ishizaki
IPC分类号： H03H9/00 , H03H9/02 , H03H9/64
CPC分类号： H03H9/6443 , H03H9/0028 , H03H9/02763 , H03H9/02992 , H03H9/14588 , H03H9/6463 , H03H9/6479 , H03H9/02913 , H03H9/14597
摘要： A surface acoustic wave resonator is constituted by an IDT electrode and reflector electrodes disposed on both sides thereof, on a piezoelectric substrate. Two of said surface acoustic wave resonators are disposed nearby so that the propagation directions of the respective surface acoustic waves are in parallel to each other to make acoustic couple to constitute a surface acoustic wave filter having plural exciting modes with different propagation frequencies. The bus bar electrodes of each of two IDT electrodes are electrically separated from each other, and the leading out electrodes led out from at least two spots on those bus bar electrodes are electrically connected to each other, by which one side of the balanced input and output terminal. As a result, the electrode resistance of the IDT electrode is alleviated to make the insertion loss less.
摘要翻译：表面声波谐振器由压电基板上的IDT电极和设置在其两侧的反射器电极构成。两个所述表面声波谐振器被设置在附近，使得各声表面波的传播方向彼此平行，以使声耦合构成具有不同传播频率的多个激励模式的表面声波滤波器。两个IDT电极中的每一个的汇流条电极彼此电分离，并且从那些汇流条电极上的至少两个点引出的引出电极彼此电连接，平衡输入的一侧和输出端子。结果，减轻了IDT电极的电极电阻，使插入损耗减小。

25. 发明申请

US20120032753A1 ANTENNA SHARER 有权
标题翻译：天线共享器
公开(公告)号：US20120032753A1
公开(公告)日：2012-02-09
申请号：US13265338
申请日：2010-04-21
申请人： Kazunori Nishimura , Toru Jibu , Tetsuya Tsurunari
发明人： Kazunori Nishimura , Toru Jibu , Tetsuya Tsurunari
IPC分类号： H03H9/25
CPC分类号： H03H9/1452 , H03H9/008 , H03H9/02803 , H03H9/14526 , H03H9/643 , H03H9/6456 , H03H9/6479 , H03H9/725
摘要： An antenna sharer with both low loss and sharp attenuation characteristic in a wide band is achieved. Antennal sharer 1 of the present invention includes first filter 3 for passing a signal in the first frequency band, and second filter 4 for passing a signal in the second frequency band higher than the first frequency band. First filter 3 includes a ladder filter that includes first series resonator 6 and second series resonator 7 with an antiresonant frequency point higher than antiresonant frequency of first series resonator. Electromechanical coupling coefficient of first series resonator 6 is smaller than electromechanical coupling coefficient of second series resonator 7.
摘要翻译：实现了在宽带中具有低损耗和尖锐衰减特性的天线共享器。本发明的天线共享器1包括用于使第一频带中的信号通过的第一滤波器3和用于使比第一频带高的第二频带中的信号通过的第二滤波器4。第一滤波器3包括梯形滤波器，其包括具有比第一串联谐振器的反谐振频率高的反谐振频率点的第一串联谐振器6和第二串联谐振器7。第一串联谐振器6的机电耦合系数小于第二串联谐振器7的机电耦合系数。

26. 发明申请

US20100219718A1 BOUNDARY ACOUSTIC WAVE DEVICE 有权
标题翻译：边界声波装置
公开(公告)号：US20100219718A1
公开(公告)日：2010-09-02
申请号：US12680774
申请日：2008-10-21
申请人： Kazunori Nishimura , Hiroyuki Nakamura , Hidekazu Nakanishi , Ryouichi Takayama , Takashi Inoue
发明人： Kazunori Nishimura , Hiroyuki Nakamura , Hidekazu Nakanishi , Ryouichi Takayama , Takashi Inoue
IPC分类号： H01L41/09 , H01L41/04
CPC分类号： H03H9/0222 , H03H9/02574
摘要： A boundary acoustic wave device includes a first medium layer made of piezoelectric material, a second medium layer provided on the first medium layer, a third medium layer provided on the second medium layer, and an electrode provided at an interface between the second and third medium layers. The electrode drives the third medium layer to generate a transverse wave. A propagation speed of the transverse wave in the third medium layer is lower than a propagation speed of the transverse wave in the first medium layer. A propagation speed of the transverse wave in the second medium layer is lower than the propagation speed of the transverse wave in the first medium layer. This boundary acoustic wave device has a large electro-mechanical coupling coefficient.
摘要翻译：弹性边界波装置包括由压电材料制成的第一介质层，设置在第一介质层上的第二介质层，设置在第二介质层上的第三介质层，以及设置在第二介质和第三介质之间的界面处的电极层。电极驱动第三介质层产生横波。第三介质层中的横波的传播速度低于第一介质层中的横波的传播速度。第二介质层中的横波的传播速度低于第一介质层中的横波的传播速度。该声界面波装置具有大的机电耦合系数。

27. 发明授权

US07781936B2 Surface acoustic wave device having gap between surface acoustic wave filters covered by sealer 有权
标题翻译：表面声波装置在由密封器覆盖的表面声波滤波器之间具有间隙
公开(公告)号：US07781936B2
公开(公告)日：2010-08-24
申请号：US12280587
申请日：2008-02-29
申请人： Kazunori Nishimura , Tetsurou Simamura
发明人： Kazunori Nishimura , Tetsurou Simamura
IPC分类号： H01L41/08
CPC分类号： H03H9/725 , H03H9/0576 , H03H9/1078 , H03H9/1085
摘要： A surface acoustic wave device includes a base substrate, first and second surface acoustic wave filters mounted on a surface of the base substrate, and a sealer provided on the surface of the base substrate and covering the first and second surface acoustic wave filters. The first and second surface acoustic wave filters include first and second piezoelectric substrates. The second piezoelectric substrate is located away from the first piezoelectric substrate via a gap. This surface acoustic wave device reduces inter-modulation.
摘要翻译：表面声波装置包括基底基板，安装在基底基板的表面上的第一和第二表面声波滤波器，以及设置在基底基板的表面上并覆盖第一和第二声表面波滤波器的密封器。第一和第二声表面波滤波器包括第一和第二压电基片。第二压电基板经由间隙远离第一压电基板。该声表面波装置减少了互调。

28. 发明申请

US20060139126A1 Surface acoustic wave (SAW) resonator SAW filter and SAW antenna duplexer using the SAW resonator 有权
公开(公告)号：US20060139126A1
公开(公告)日：2006-06-29
申请号：US11357211
申请日：2006-02-21
申请人： Hiroyuki Nakamura , Shunichi Seki , Kazunori Nishimura , Toru Sakuragawa
发明人： Hiroyuki Nakamura , Shunichi Seki , Kazunori Nishimura , Toru Sakuragawa
IPC分类号： H03H9/64
CPC分类号： H03H9/6483 , H03H9/0274 , H03H9/02748 , H03H9/14547
摘要： A SAW resonator includes an IDT electrode formed on a piezoelectric substrate and reflector electrodes disposed on both sides of the IDT electrode. The IDT electrode includes first finger-electrodes, second finger-electrodes and strip-line electrodes. The first and the second finger-electrodes do not overlap with each other but are acoustically coupled together by the strip-line electrodes. This acoustic coupling by the strip-line electrodes eliminates the need for a common bus-bar electrode, so that the loss caused by the resistance of the common bus-bar electrode can be reduced, and the SAW resonator can be downsized.

29. 发明授权

US07064471B2 Surface acoustic wave device, method of manufacturing the device, and electronic component using the device and method 失效
标题翻译：表面声波装置，制造装置的方法以及使用该装置和方法的电子部件
公开(公告)号：US07064471B2
公开(公告)日：2006-06-20
申请号：US10362209
申请日：2002-06-18
申请人： Kazuo Ikeda , Kazunori Nishimura , Yasumichi Murase
发明人： Kazuo Ikeda , Kazunori Nishimura , Yasumichi Murase
IPC分类号： H03H9/25
CPC分类号： H03H9/6473 , H01L2224/05568 , H01L2224/05573 , H01L2224/16225 , H01L2924/16195 , H03H3/08 , H03H9/02913 , H03H9/02921 , H03H9/059 , H03H9/1071 , H03H9/25 , H03H9/6433 , H03H9/6463 , H01L2224/05624 , H01L2924/00014 , H01L2224/05647 , H01L2224/05655 , H01L2224/05666 , H01L2224/05671
摘要： A surface acoustic wave (SAW) device includes a comb-shaped electrode 2, a reflector 3 and a plurality of auxiliary electrodes 6a and 6b for surrounding the comb-shaped electrode 2 and the reflector 3, which are electrically independent of each other and have different widths locally. The SAW device is capable of efficiently and electrically uniformizing electric charge generated by pyroelectric property of a piezoelectric substrate 1.
摘要翻译：表面声波（SAW）器件包括梳状电极2，反射器3和用于围绕彼此电独立的梳状电极2和反射器3的多个辅助电极6a和6b 并且在本地具有不同的宽度。 SAW器件能够使由压电基片1的热电性产生的电荷有效地并且均匀化。

30. 发明授权

US5581141A Surface acoustic wave filter 失效
公开(公告)号：US5581141A
公开(公告)日：1996-12-03
申请号：US319790
申请日：1994-10-07
申请人： Toru Yamada , Toshio Ishizaki , Kazunori Nishimura , Kozo Murakami
发明人： Toru Yamada , Toshio Ishizaki , Kazunori Nishimura , Kozo Murakami
IPC分类号： H03H7/38 , H03H9/00 , H03H9/05 , H03H9/64 , H01L41/08
CPC分类号： H03H9/6479 , H03H9/0028 , H03H9/0542 , H03H9/14591 , H03H9/14597 , H03H9/6433 , H03H9/6463 , H03H7/38
摘要： A SAW resonator disposed with an IDT electrode and reflector electrodes is formed on the surface of a piezoelectric substrate. Three pieces of the SAW resonator form an acoustic coupling by being disposed close to each other, electrode fingers comprising the IDT electrode in the center are all grounded, and IDT electrode fingers are electrically independent on the side to be connected to input-output terminals of the IDT electrodes disposed outside. As a result, three excitation modes having different propagation frequencies are generated which are used to attain a broad band SAW resonator filter. When these three pairs of the IDT electrode are electrically independent, a balanced input-output can be achieved, and excellent out-of-band rejection characteristics can be obtained.

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