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1. 发明授权

US06972643B2 Surface acoustic wave filter 有权
标题翻译：表面声波滤波器
公开(公告)号：US06972643B2
公开(公告)日：2005-12-06
申请号：US10362903
申请日：2002-06-26
申请人： Akio Tsunekawa , Shunichi Seki , Shinobu Nakaya , Hiroyuki Nakamura , Toru Yamada
发明人： Akio Tsunekawa , Shunichi Seki , Shinobu Nakaya , Hiroyuki Nakamura , Toru Yamada
IPC分类号： H03H9/00 , H03H9/02 , H03H9/145 , H03H9/25 , H03H9/64
CPC分类号： H03H9/6436 , H03H9/0028 , H03H9/0042 , H03H9/14582 , H03H9/25 , H03H9/643 , H03H9/6433
摘要： A longitudinally coupled surface acoustic wave filter includes a first, second and third IDT electrodes and a first and second reflector electrodes on a piezoelectric substrate. The IDT electrodes each include a primary excitation region having λ/2 electrode finger pitches, where λ is the wavelength of a surface acoustic wave. The primary excitation region is phase-shifted by a certain amount in accordance with a desired passband frequency response. The IDT electrodes further include a plurality of secondary excitation regions each having electrode finger pitches different from the λ/2 pitches. All of the electrode finger pitches of the surface acoustic wave filter thus range from 0.8λ/2 to 1.2λ/2, so that a loss increase caused by discontinuity between the IDT electrodes is prevented.
摘要翻译：纵向耦合表面声波滤波器包括第一，第二和第三IDT电极以及压电基片上的第一和第二反射器电极。 IDT电极各自包括具有λ/ 2电极指间距的主激励区域，其中λ是表面声波的波长。主激励区域根据期望的通带频率响应被相移一定量。 IDT电极还包括多个辅助激励区域，每个辅助激励区域具有不同于λ/ 2间距的电极指间距。因此，表面声波滤波器的所有电极指间距从0.8λ/ 2到1.2λ/ 2，从而防止IDT电极之间的不连续性引起的损耗增加。

2. 发明授权

US07019435B2 Surface acoustic wave device 有权
标题翻译：表面声波装置
公开(公告)号：US07019435B2
公开(公告)日：2006-03-28
申请号：US10812026
申请日：2004-03-30
申请人： Shinobu Nakaya , Hiroyuki Nakamura , Shigeru Tsuzuki
发明人： Shinobu Nakaya , Hiroyuki Nakamura , Shigeru Tsuzuki
IPC分类号： H03H9/64 , H03H9/145
CPC分类号： H03H9/6433 , H03H9/0038 , H03H9/0071 , H03H9/02685 , H03H9/14588 , H03H9/643 , H03H9/6469 , H03H9/6473
摘要： In a SAW device containing two or more longitudinal mode coupling type SAW elements connected in parallel, each SAW element includes at least three comb shaped electrode pairs and a reflector electrode provided at both sides of the comb shaped electrodes. One part of respective comb shaped electrode pairs forming IDT electrodes is connected together in common by a ground connection electrode and connected with a ground pad. This configuration enables the number of connection pads to be minimized, thus providing a SAW device that is small in size and superior in filter characteristics.
摘要翻译：在包含并联连接的两个或更多个纵向耦合型SAW元件的SAW器件中，每个SAW元件包括至少三个梳状电极对和设置在梳状电极两侧的反射器电极。形成IDT电极的各个梳状电极对的一部分共同地由接地连接电极连接在一起，并与接地垫连接。这种配置使连接焊盘的数量最小化，从而提供尺寸小且滤波器特性优异的SAW器件。

3. 发明授权

US07286028B2 Surface acoustic wave filter and device employing it 有权
标题翻译：表面声波滤波器及其使用的器件
公开(公告)号：US07286028B2
公开(公告)日：2007-10-23
申请号：US10517827
申请日：2004-06-08
申请人： Hiroshi Kushitani , Shinobu Nakaya
发明人： Hiroshi Kushitani , Shinobu Nakaya
IPC分类号： H03H9/64
CPC分类号： H03H9/6483
摘要： A surface acoustic wave (SAW) filter includes a first SAW resonator, a second SAW resonator connected in series to the first SAW resonator at a first node, a third SAW resonator connected in series to the second SAW resonator at a second node, a fourth SAW resonator connected in series to the third SAW resonator at a third node, a fifth SAW resonator connected between the first node and ground, a sixth SAW resonator connected between the third node and ground, and a first capacitance element connected between the second node and ground. Further, the SAW filter includes a first inductance element connected in series to the fifth SAW resonator, and a second inductance element connected in series to the sixth SAW resonator. This SAW filter has a sharp attenuation at a high frequency of a pass band, thereby widening the pass band and reducing the loss thereof.
摘要翻译：表面声波（SAW）滤波器包括第一SAW谐振器，在第一节点与第一SAW谐振器串联连接的第二SAW谐振器，在第二节点与第二SAW谐振器串联连接的第三SAW谐振器，第四节点 SAW谐振器在第三节点处与第三SAW谐振器串联连接，连接在第一节点和地之间的第五SAW谐振器，连接在第三节点和地之间的第六SAW谐振器和连接在第二节点和地之间的第一电容元件地面。此外，SAW滤波器包括与第五SAW谐振器串联连接的第一电感元件和与第六SAW谐振器串联连接的第二电感元件。该SAW滤波器在通带的高频下具有明显的衰减，从而扩大通带并减少其损耗。

4. 发明授权

US07183878B2 Surface acoustic wave filter 有权
标题翻译：表面声波滤波器
公开(公告)号：US07183878B2
公开(公告)日：2007-02-27
申请号：US10526919
申请日：2004-08-20
申请人： Hiroshi Kushitani , Shinobu Nakaya , Takeo Yasuho
发明人： Hiroshi Kushitani , Shinobu Nakaya , Takeo Yasuho
IPC分类号： H03H9/72 , H03H9/64
CPC分类号： H03H9/0576
摘要： A surface acoustic wave filter having a plurality of the transmission lines, each with one end connected to the surface acoustic wave element and the other end thereof connected to a ground. The transmission lines are divided by an additional transmission line which has multiple connections to a ground electrode at an interval equal to or lower than a wavelength of a using frequency. This structure provides grounds among a plurality of transmission lines and thus isolation among terminals can be increased to improve the filter characteristic.
摘要翻译：一种表面声波滤波器，具有多个传输线，每个传输线的一端连接到声表面波元件，另一端连接到地面。传输线被以与等于或小于使用频率的波长的间隔具有到接地电极的多个连接的附加传输线分开。这种结构在多个传输线之间提供接地，从而可以增加终端之间的隔离以提高滤波器特性。

5. 发明申请

US20060164182A1 Surface acoustic wave filter 有权
标题翻译：表面声波滤波器
公开(公告)号：US20060164182A1
公开(公告)日：2006-07-27
申请号：US10526919
申请日：2004-08-20
申请人： Hiroshi Kushitani , Shinobu Nakaya , Takeo Yasuho
发明人： Hiroshi Kushitani , Shinobu Nakaya , Takeo Yasuho
IPC分类号： H03H9/72 , H03H9/64
CPC分类号： H03H9/0576
摘要： A surface acoustic wave filter having at least one transmission line of which one end of a plurality of the transmission lines is connected to the surface acoustic wave element and the other end thereof is connected to a ground, and the transmission lines being divided by a transmission line which is connected to a ground electrode at an interval equal to or lower than a wavelength of a using frequency. This structure provides grounds among a plurality of transmission lines and thus isolation among terminals can be increased to improve the filter characteristic.
摘要翻译：一种表面声波滤波器，其具有至少一条传输线，多条传输线的一端连接到声表面波元件，另一端连接到地，并且传输线被传输线以等于或低于使用频率的波长的间隔连接到接地电极。这种结构在多个传输线之间提供接地，从而可以增加终端之间的隔离以提高滤波器特性。

6. 发明申请

US20050231306A1 Surface acoustic wave filter and device employing it 有权
标题翻译：表面声波滤波器及其使用的器件
公开(公告)号：US20050231306A1
公开(公告)日：2005-10-20
申请号：US10517827
申请日：2004-06-08
申请人： Hiroshi Kushitani , Shinobu Nakaya
发明人： Hiroshi Kushitani , Shinobu Nakaya
IPC分类号： H03H9/02 , H03H9/145 , H03H9/64 , H03H9/72
CPC分类号： H03H9/6483
摘要： A surface acoustic wave (SAW) filter includes a first SAW resonator, a second SAW resonator connected in series to the first SAW resonator at a first node, a third SAW resonator connected in series to the second SAW resonator at a second node, a fourth SAW resonator connected in series to the third SAW resonator at a third node, a fifth SAW resonator connected between the first node and a ground, a sixth SAW resonator connected between the third node and a ground, and a first capacitance element having a capacitance and connected between the second node and a ground. This SAW filter has a sharp attenuation characteristic at a high frequency area of a pass band, thereby widening the pass band and reducing a loss at the pass band.
摘要翻译：表面声波（SAW）滤波器包括第一SAW谐振器，在第一节点与第一SAW谐振器串联连接的第二SAW谐振器，在第二节点与第二SAW谐振器串联连接的第三SAW谐振器，第四节点 SAW谐振器在第三节点处串联连接到第三SAW谐振器，连接在第一节点和地之间的第五SAW谐振器，连接在第三节点和地之间的第六SAW谐振器，以及连接在第三节点和地之间的第一电容元件，连接在第二节点和地之间。该SAW滤波器在通带的高频区域具有明显的衰减特性，从而扩大通带并减小通带的损耗。

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