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1. 发明授权

US06710683B2 Surface acoustic wave filter and communications apparatus using the same 有权
标题翻译：表面声波滤波器和使用它的通信装置
公开(公告)号：US06710683B2
公开(公告)日：2004-03-23
申请号：US10114866
申请日：2002-04-01
申请人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Tsutomu Igaki , Shigeru Tsuzuki , Ken Matsunami , Toshio Ishizaki
发明人： Hiroyuki Nakamura , Toru Yamada , Kazunori Nishimura , Tsutomu Igaki , Shigeru Tsuzuki , Ken Matsunami , Toshio Ishizaki
IPC分类号： H03H964
CPC分类号： H03H9/6426
摘要： A surface acoustic wave filter has a piezoelectric substrate and at least two interdigital transducer electrodes on the piezoelectric substrate, wherein at least one of the interdigital transducer electrodes includes a unidirectional electrode and bidirectional electrode, and the length &lgr;d of a basic cell of the unidirectional electrode is longer than the length &lgr;s of a basic cell of the bidirectional electrode.
摘要翻译：表面声波滤波器在压电基板上具有压电基板和至少两个叉指式换能器电极，其中叉指式换能器电极中的至少一个包括单向电极和双向电极，并且单向电极的基本单元的长度lambdad为长于双向电极的基本电池的长度lambdas。

2. 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。

3. 发明授权

US06469598B2 SAW filter with unidirectional transducer and communication apparatus using the same 有权
标题翻译：具有单向换能器的SAW滤波器及其使用的通信装置
公开(公告)号：US06469598B2
公开(公告)日：2002-10-22
申请号：US09803771
申请日：2001-03-12
申请人： Shigeru Tsuzuki , Tsutomu Igaki , Kazunori Nishimura , Ken Matsunami
发明人： Shigeru Tsuzuki , Tsutomu Igaki , Kazunori Nishimura , Ken Matsunami
IPC分类号： H03H964
CPC分类号： H03H9/14505
摘要： A surface acoustic wave (SAW) filter is disclosed which comprises a piezoelectric substrate and at least two Interdigital Transducers (IDTs) having four fingered electrodes in a region corresponding to one-wavelength of SAW excited on the piezoelectric substrate. At least one IDT is formed of at least one pair of fingered electrodes having different electrode widths. By provision of the pair of fingered electrodes being different in electrode width, the IDT can be given unidirectionality. Thus, a SAW filter producing a low insertion loss and having good amplitude and phase characteristics in the pass-band can be realized. Further, by using such SAW filter, a high-performance and low-cost communication apparatus, such as a CDMA-system mobile telephone, can be realized.
摘要翻译：公开了一种表面声波（SAW）滤波器，其包括压电基片和至少两个在对应于在压电基片上激发的SAW的一波长波长的区域中的四指指电极的指数指数变换器（IDT）。至少一个IDT由具有不同电极宽度的至少一对指形电极形成。通过设置电极宽度不同的一对指形电极，可以给予IDT单向性。因此，可以实现在通带中产生低插入损耗并具有良好振幅和相位特性的SAW滤波器。此外，通过使用这样的SAW滤波器，可以实现诸如CDMA系统移动电话的高性能和低成本通信装置。

4. 发明授权

US07501917B2 Surface acoustic wave filter 有权
标题翻译：表面声波滤波器
公开(公告)号：US07501917B2
公开(公告)日：2009-03-10
申请号：US10577141
申请日：2004-11-18
申请人： Kazunori Nishimura , Tsutomu Igaki , Ken Matsunami , Hiroyuki Nakamura
发明人： Kazunori Nishimura , Tsutomu Igaki , Ken Matsunami , Hiroyuki Nakamura
IPC分类号： H03H9/64 , H03H9/145
CPC分类号： H03H9/6436 , H03H9/0274 , H03H9/14588 , H03H9/6426 , H03H9/6473
摘要： A SAW filter is configured by forming a first IDT and a second IDT on a piezoelectric substrate, and the first IDT is arranged between one terminal of input/output terminals and another terminal of the input/output terminals, i.e., serially in a signal path, and the second IDT is arranged in parallel to a signal path from a portion between one terminal of the input/output terminals and the first IDT. The first IDT and the second IDT are arranged in proximity to each other and on the same propagation path of surface acoustic waves which are excited by each of the resonators.
摘要翻译： SAW滤波器通过在压电基板上形成第一IDT和第二IDT来构成，第一IDT被布置在输入/输出端子的一个端子与输入/输出端子的另一个端子之间，即串联地在信号路径并且第二IDT与从输入/输出端子的一个端子和第一IDT之间的部分的信号路径平行布置。第一IDT和第二IDT被布置在彼此附近并且在由每个谐振器激励的表面声波的相同传播路径上。

5. 发明申请

US20070069837A1 Surface acoustic wave filter 有权
标题翻译：表面声波滤波器
公开(公告)号：US20070069837A1
公开(公告)日：2007-03-29
申请号：US10577141
申请日：2004-11-18
申请人： Kazunori Nishimura , Tsutomu Igaki , Ken Matsunami , Hiroyuki Nakamura
发明人： Kazunori Nishimura , Tsutomu Igaki , Ken Matsunami , Hiroyuki Nakamura
IPC分类号： H03H9/64
CPC分类号： H03H9/6436 , H03H9/0274 , H03H9/14588 , H03H9/6426 , H03H9/6473
摘要： It is configured by forming first IDT (202) and second IDT (203) on piezoelectric substrate (201), and first IDT (202) is arranged between one terminal (204) of input/output terminals and other terminal (205) of the input/output terminals, i.e., serially to a signal path, and second IDT (203) is arranged in parallel to a signal path from a portion between one terminal (204) of the input/output terminals and first IDT (202). First IDT (202) and second IDT (203) are arranged in proximity to each other on the same propagation path of surface acoustic waves which are excited by respective resonators.
摘要翻译：通过在压电基板（201）上形成第一IDT（202）和第二IDT（203）来构成，并且第一IDT（202）被布置在输入/输出端子的一个端子（204）和输入/输出端子，即串行地连接到信号路径，第二IDT（203）与来自输入/输出端子的一个端子（204）和第一IDT（202）之间的部分的信号路径平行布置。第一IDT（202）和第二IDT（203）在由相应的谐振器激励的表面声波的相同传播路径上彼此靠近地布置。

6. 发明授权

US06496086B2 SAW device with inclined reflectors and communication device using SAW device 有权
标题翻译：具有倾斜反射器的SAW器件和使用SAW器件的通信装置
公开(公告)号：US06496086B2
公开(公告)日：2002-12-17
申请号：US09913043
申请日：2001-11-13
申请人： Shigeru Tsuzuki , Tsutomu Igaki , Ken Matsunami , Kazuki Nishimura
发明人： Shigeru Tsuzuki , Tsutomu Igaki , Ken Matsunami , Kazuki Nishimura
IPC分类号： H03H964
CPC分类号： H03H9/14552 , H03H9/0028 , H03H9/02622 , H03H9/02716 , H03H9/02771 , H03H9/02795 , H03H9/02874 , H03H9/14505 , H03H9/14517 , H03H9/14526 , H03H9/6433
摘要： A saw device comprises input/output interdigital transducer (IDT) electrodes(11,12) provided on piezoelectric substrates (10), a first reflector electrode (13) following the input IDT electrode (11), and a second reflector electrode (14) preceding the output IDT electrode (12). The device satisfies the following inequality (1) to provide preferable characteristics in a pass band: 2(&thgr;−5)≦tan−1(D/L)≦2(&thgr;+5) where &thgr;: the inclination (in degree, except zero) of the first or second reflector electrode of the input and output IDT electrodes with respect to a plane perpendicular to the direction in which surface acoustic waves travel. D: the pitch (in micron) of the input and output IDT electrodes in the direction in which surface acoustic waves travel. L: the pitch (in micron) of the first and second reflector electrodes.
摘要翻译：锯装置包括设置在压电基板（10）上的输入/输出叉指式换能器（IDT）电极（11,12），跟随输入IDT电极（11）的第一反射器电极（13）和第二反射器电极（14）在输出IDT电极（12）之前。该装置满足以下不等式（1），以提供通带中优选的特性：2（θ-5）<= tan-1（D / L）<= 2（θ+ 5）其中θ：输入和输出IDT电极的第一或第二反射器电极相对于与声表面波行进的方向垂直的平面除零之外）。 D：输入和输出IDT电极在表面声波传播方向上的间距（微米）。 L：第一和第二反射器电极的间距（微米）。

7. 发明授权

US07679474B2 Surface acoustic wave resonator, and surface acoustic wave filter 有权
标题翻译：表面声波谐振器和表面声波滤波器
公开(公告)号：US07679474B2
公开(公告)日：2010-03-16
申请号：US10580915
申请日：2005-01-06
申请人： Tsutomu Igaki , Kazunori Nishimura , Kazuo Ikeda , Ken Matsunami
发明人： Tsutomu Igaki , Kazunori Nishimura , Kazuo Ikeda , Ken Matsunami
IPC分类号： H03H9/25 , H03H9/145 , H03H9/64
CPC分类号： H03H9/14544 , H03H9/14582 , H03H9/6483
摘要： A surface acoustic wave resonator has a piezoelectric substrate (11), an IDT (13) formed of a plurality of electrode fingers (12) disposed on piezoelectric substrate (11), and reflectors (14) disposed near the opposite ends of IDT (13). The IDT (13) has a gradation region where the electrode finger pitch of the plurality of electrode fingers (12) at the opposite ends is different from the electrode finger pitch near the center of the IDT (13). In this gradation region, the electrode finger pitches are sequentially varied in the range from the electrode finger at the farthest end that is one end of the gradation region to the electrode finger lying at the other end of the gradation region. The electrode finger pitch of the electrode fingers at the farthest end that is one end of the gradation region is set to be 1 through 5% smaller than the electrode finger pitch near the center of the IDT (13).
摘要翻译：表面声波谐振器具有压电基板（11），由设置在压电基板（11）上的多个电极指（12）形成的IDT（13）和设置在IDT（13）的相对端附近的反射器）。 IDT（13）具有灰色区域，其中在相对端的多个电极指（12）的电极指间隔与IDT（13）的中心附近的电极指间隔不同。在该灰度区域中，电极指间隔在从作为灰度区域的一端的最远端的电极指与位于灰度区域的另一端的电极指的范围内依次变化。作为灰度区域的一端的最远端的电极指的电极指间距被设定为比IDT（13）的中心附近的电极指间隔小1〜5％。

8. 发明申请

US20090108960A1 Surface Acoustic Wave Resonator, and Surface Acoustic Wave Filter 有权
标题翻译：表面声波谐振器和表面声波滤波器
公开(公告)号：US20090108960A1
公开(公告)日：2009-04-30
申请号：US10580915
申请日：2005-01-06
申请人： Tsutomu Igaki , Kazunori Nishimura , Kazuo Ikeda , Ken Matsunami
发明人： Tsutomu Igaki , Kazunori Nishimura , Kazuo Ikeda , Ken Matsunami
IPC分类号： H03H9/64
CPC分类号： H03H9/14544 , H03H9/14582 , H03H9/6483
摘要： A surface acoustic wave resonator has piezoelectric substrate (11), IDT (13) formed of a plurality of electrode fingers (12) disposed on piezoelectric substrate (11), and reflectors (14) disposed near the opposite ends of IDT (13). IDT (13) has a gradation region where the electrode finger pitch of the plurality of electrode fingers (12) at the opposite ends is different from the electrode finger pitch near the center of IDT (13). In this gradation region, the electrode finger pitches are sequentially varied in the range from the electrode finger at the farthest end that is one end of the gradation region to the electrode finger lying at the other end of the gradation region. The electrode finger pitch of the electrode fingers at the farthest end that is one end of the gradation region is set to be 1 through 5% smaller than the electrode finger pitch near the center of IDT (13).
摘要翻译：表面声波谐振器具有压电基板（11），由设置在压电基板（11）上的多个电极指（12）形成的IDT（13）和设置在IDT（13）的相对端附近的反射器（14）。 IDT（13）具有灰色区域，其中在相对端的多个电极指（12）的电极指间距与IDT（13）中心附近的电极指间距不同。在该灰度区域中，电极指间隔在从作为灰度区域的一端的最远端的电极指与位于灰度区域的另一端的电极指的范围内依次变化。作为灰度区域的一端的最远端的电极指的电极指间距设定为比IDT（13）的中心附近的电极指间隔小1〜5％。

9. 发明授权

US07646266B2 Surface acoustic wave resonator and surface acoustic wave filter using the same 有权
标题翻译：表面声波谐振器和表面声波滤波器使用相同
公开(公告)号：US07646266B2
公开(公告)日：2010-01-12
申请号：US11587538
申请日：2005-04-21
申请人： Tsutomu Igaki , Shun-ichi Seki , Kazuo Ikeda
发明人： Tsutomu Igaki , Shun-ichi Seki , Kazuo Ikeda
IPC分类号： H03H9/25 , H03H9/64
CPC分类号： H03H9/02559 , H03H9/6433 , H03H9/6496
摘要： A Q-factor of a resonator at a high frequency is improved. An insertion loss of a filter using such a resonator and steepness of the filter are improved. A plurality of surface acoustic wave resonators including an interdigital transducer and reflecting electrodes provided on both sides thereof are connected in parallel on a piezoelectric substrate. Resonance frequencies of the surface acoustic wave resonators are rendered equal among all the resonators connected in parallel. In this way, the Q-factor of the resonance can be improved. A surface acoustic wave filter using such surface acoustic wave resonators is formed in order to improve the insertion loss and the steepness.
摘要翻译：提高高频谐振器的Q因子。使用这种谐振器的滤波器的插入损耗和滤波器的陡度得到改善。包括叉指式换能器和设置在其两侧的反射电极的多个表面声波谐振器并联连接在压电基片上。在所有并联连接的谐振器中，声表面波谐振器的共振频率相等。以这种方式，可以提高谐振的Q因子。为了提高插入损耗和陡度，形成使用这样的表面声波谐振器的声表面波滤波器。

10. 发明授权

US07482895B2 Surface acoustic wave filter 有权
标题翻译：表面声波滤波器
公开(公告)号：US07482895B2
公开(公告)日：2009-01-27
申请号：US10563281
申请日：2004-07-28
申请人： Tsutomu Igaki , Kazuo Ikeda , Akio Tsunekawa
发明人： Tsutomu Igaki , Kazuo Ikeda , Akio Tsunekawa
IPC分类号： H03H9/64 , H03H9/25
CPC分类号： H03H9/6483 , H03H9/0274 , H03H9/14588
摘要： A saw filter of the invention has a piezoelectric substrate (11), plural numbers of IDT electrodes (12,13) arranged on a surface of the piezoelectric substrate (11) as well as on a first surface acoustic wave propagation path, reflector electrodes (14,15) arranged at least at both ends of a first electrode pattern formed including the plural IDT electrodes (12,13), one or more IDT electrodes (16) arranged on the surface of the piezoelectric substrate (11) as well as on a second surface acoustic wave propagation path which is different from the first surface acoustic wave propagation path and reflector electrodes arranged at least at both sides of a second electrode pattern formed including the IDT electrode (16), in which the IDT electrodes (12,13) on the first surface acoustic wave propagation path are electrically connected in series by connecting wirings (19) and the IDT electrode (16) on the second surface acoustic wave propagation path is connected between the connecting wirings (19) and the ground (20), which are arranged between the first electrode pattern and the second electrode pattern. According to this, the chip size can be made small.
摘要翻译：本发明的锯屑过滤器具有压电基板（11），多个设置在压电基板（11）的表面上的IDT电极（12,13）以及第一声表面波传播路径，反射器电极至少布置在形成有包括多个IDT电极（12,13）的第一电极图案的两端，布置在压电基板（11）的表面上的一个或多个IDT电极（16）与第一表面声波传播路径不同的第二表面声波传播路径和至少布置在包括IDT电极（16）的第二电极图案的两侧的反射器电极，其中IDT电极（12,13 ）在第一声表面波传播路径上通过连接布线（19）串联电连接，并且第二声表面波传播路径上的IDT电极（16）连接在连接布线（ 19）和布置在第一电极图案和第二电极图案之间的接地（20）。据此，可以使芯片尺寸小。

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