公开(公告)号：US07002438B2

公开(公告)日：2006-02-21

申请号：US10925152

申请日：2004-08-25

申请人： Osamu Kawachi ,  Satoshi Orito ,  Takuya Abe

发明人： Osamu Kawachi ,  Satoshi Orito ,  Takuya Abe

IPC分类号： H03H9/64

CPC分类号： H03H9/6469 ,  H03H9/0042

摘要： A surface acoustic wave device includes: a substrate; a pair of reflection electrodes that are formed on the substrate; and drive electrodes that are interposed between the reflection electrodes. In this surface acoustic wave device, the pitches in each of the reflection electrodes vary according to a predetermined variation pattern. With this structure, the suppression on spurious signals and the shape factor (the sharpness of the cut-off region of the pass band) can be improved at the same time.

摘要翻译： 声表面波装置包括：基板; 形成在基板上的一对反射电极; 以及介于反射电极之间的驱动电极。 在该声表面波装置中，每个反射电极中的间距根据预定的变化图案而变化。 利用这种结构，可以同时提高抑制寄生信号和形状因子（通带的截止区域的清晰度）。

公开(公告)号：US20050035831A1

公开(公告)日：2005-02-17

申请号：US10925152

申请日：2004-08-25

申请人： Osamu Kawachi ,  Satoshi Orito ,  Takuya Abe

发明人： Osamu Kawachi ,  Satoshi Orito ,  Takuya Abe

IPC分类号： H01L41/09 ,  H01L41/18 ,  H03H3/08 ,  H03H9/00 ,  H03H9/02 ,  H03H9/145 ,  H03H9/25 ,  H03H9/64

CPC分类号： H03H9/6469 ,  H03H9/0042

摘要： A surface acoustic wave device includes: a substrate; a pair of reflection electrodes that are formed on the substrate; and drive electrodes that are interposed between the reflection electrodes. In this surface acoustic wave device, the pitches in each of the reflection electrodes vary according to a predetermined variation pattern. With this structure, the suppression on spurious signals and the shape factor (the sharpness of the cut-off region of the pass band) can be improved at the same time.

摘要翻译： 声表面波装置包括：基板; 形成在基板上的一对反射电极; 以及介于反射电极之间的驱动电极。 在该声表面波装置中，每个反射电极中的间距根据预定的变化图案而变化。 利用这种结构，可以同时提高抑制寄生信号和形状因子（通带的截止区域的清晰度）。

公开(公告)号：US07071796B2

公开(公告)日：2006-07-04

申请号：US10863484

申请日：2004-06-09

申请人： Masanori Ueda ,  Osamu Kawachi ,  Motoyuki Tajima ,  Kenya Hashimoto ,  Takuya Abe

发明人： Masanori Ueda ,  Osamu Kawachi ,  Motoyuki Tajima ,  Kenya Hashimoto ,  Takuya Abe

IPC分类号： H03H9/64

CPC分类号： H03H9/6469 ,  H03H9/0071 ,  H03H9/14535 ,  H03H9/6436 ,  H03H9/6476 ,  H03H9/6483

摘要： A surface acoustic wave filter capable of obtaining a low insertion loss and wide bandwidth characteristic is provided. The surface acoustic wave filter includes a piezoelectric substrate; a pair of reflective electrodes formed on the piezoelectric substrate; and a plurality of comb electrodes formed between the pair of reflective electrodes on the piezoelectric substrate, wherein, in regard to the neighboring two comb electrodes among the plurality of comb electrodes, an electrode pitch of one comb electrode is set so that continuously varying phases of surface acoustic waves respectively generated by the two comb electrodes are obtained in a gap opposite to an outermost finger electrode of the other neighboring comb electrode.

公开(公告)号：US06498548B2

公开(公告)日：2002-12-24

申请号：US09863443

申请日：2001-05-24

申请人： Yasufumi Kaneda ,  Masanori Ueda ,  Osamu Kawachi ,  Takuya Abe

发明人： Yasufumi Kaneda ,  Masanori Ueda ,  Osamu Kawachi ,  Takuya Abe

IPC分类号： H03H964

CPC分类号： H03H9/6433

摘要： A surface acoustic wave filter is free from any loss arising from the impedance mismatching by finding out optimum values achieving a widened band and lowered loss for the electrode width of the interdigital transducer and reflector electrodes. The surface acoustic wave filter includes interdigital transducers and reflectors arranged on both sides of the transducer. The piezoelectric substrate has a ratio h/&lgr; of an electrode thickness h to a surface acoustic wave wavelength &lgr; lying within the range of 0.05≦h/&lgr;0.15 and has an electrode width ratio wr/pr of a reflector electrode width wr to an electrode pitch pr lying within the range of 0.5≦wr/pr≦0.6 and has an electrode width ratio wi/pi of an interdigital transducer interdigital electrode width wi to a pitch pi lying within the range of 0.6≦wi/pi≦0.9.

摘要翻译： 表面声波滤波器通过找到实现扩宽带的最佳值和降低叉指式换能器和反射器电极的电极宽度的损耗而不受由阻抗失配引起的任何损失。 表面声波滤波器包括布置在换能器两侧的叉指换能器和反射器。 压电基板的电极厚度h与表面声波波长兰德的比率h / lambd在0.05 <= h / lambd0.15的范围内，并且反射器电极宽度wr的电极宽度比wr / pr 电极间距pr在0.5 <= wr / pr <= 0.6的范围内，并且具有叉指式换能器叉指电极宽度wi的电极宽度比wi / pi至间距p 1在0.6 <= wi / pi <= 0.9。

公开(公告)号：US07236067B2

公开(公告)日：2007-06-26

申请号：US11410059

申请日：2006-04-25

申请人： Masanori Ueda ,  Osamu Kawachi ,  Motoyuki Tajima ,  Kenya Hashimoto ,  Takuya Abe

发明人： Masanori Ueda ,  Osamu Kawachi ,  Motoyuki Tajima ,  Kenya Hashimoto ,  Takuya Abe

IPC分类号： H03H9/64

CPC分类号： H03H9/6469 ,  H03H9/0071 ,  H03H9/14535 ,  H03H9/6436 ,  H03H9/6476 ,  H03H9/6483

摘要： A surface acoustic wave filter capable of obtaining a low insertion loss and wide bandwidth characteristic is provided. The surface acoustic wave filter includes a piezoelectric substrate; a pair of reflective electrodes formed on the piezoelectric substrate; and a plurality of comb electrodes formed between the pair of reflective electrodes on the piezoelectric substrate, wherein, in regard to the neighboring two comb electrodes among the plurality of comb electrodes, an electrode pitch of one comb electrode is set so that continuously varying phases of surface acoustic waves respectively generated by the two comb electrodes are obtained in a gap opposite to an outermost finger electrode of the other neighboring comb electrode.

摘要翻译： 提供能够获得低插入损耗和宽带宽特性的表面声波滤波器。 声表面波滤波器包括压电基片; 形成在所述压电基板上的一对反射电极; 以及形成在所述压电基板上的所述一对反射电极之间的多个梳状电极，其中，对于所述多个梳状电极中的相邻的两个梳状电极，设置一个梳状电极的电极间距，使得连续变化的相位 在与另一个相邻的梳状电极的最外侧的指状电极相反的间隙中获得由两个梳状电极分别产生的表面声波。

公开(公告)号：US20060192636A1

公开(公告)日：2006-08-31

申请号：US11410059

申请日：2006-04-25

申请人： Masanori Ueda ,  Osamu Kawachi ,  Motoyuki Tajima ,  Kenya Hashimoto ,  Takuya Abe

发明人： Masanori Ueda ,  Osamu Kawachi ,  Motoyuki Tajima ,  Kenya Hashimoto ,  Takuya Abe

IPC分类号： H03H9/64

CPC分类号： H03H9/6469 ,  H03H9/0071 ,  H03H9/14535 ,  H03H9/6436 ,  H03H9/6476 ,  H03H9/6483

摘要： A surface acoustic wave filter capable of obtaining a low insertion loss and wide bandwidth characteristic is provided. The surface acoustic wave filter includes a piezoelectric substrate; a pair of reflective electrodes formed on the piezoelectric substrate; and a plurality of comb electrodes formed between the pair of reflective electrodes on the piezoelectric substrate, wherein, in regard to the neighboring two comb electrodes among the plurality of comb electrodes, an electrode pitch of one comb electrode is set so that continuously varying phases of surface acoustic waves respectively generated by the two comb electrodes are obtained in a gap opposite to an outermost finger electrode of the other neighboring comb electrode.

摘要翻译： 提供能够获得低插入损耗和宽带宽特性的表面声波滤波器。 声表面波滤波器包括压电基片; 形成在所述压电基板上的一对反射电极; 以及形成在所述压电基板上的所述一对反射电极之间的多个梳状电极，其中，对于所述多个梳状电极中的相邻的两个梳状电极，设置一个梳状电极的电极间距，使得连续变化的相位 在与另一个相邻的梳状电极的最外侧的指状电极相反的间隙中获得由两个梳状电极分别产生的表面声波。

公开(公告)号：US20050003790A1

公开(公告)日：2005-01-06

申请号：US10746255

申请日：2003-12-29

申请人： Osamu Kawachi ,  Takuya Abe ,  Yasufumi Kaneda ,  Motoyuki Tajima

发明人： Osamu Kawachi ,  Takuya Abe ,  Yasufumi Kaneda ,  Motoyuki Tajima

IPC分类号： H03H9/145 ,  H03H9/02 ,  H04B1/46 ,  H04B1/10 ,  H04B1/16 ,  H04B1/18

CPC分类号： H03H9/02771

摘要： A surface acoustic wave device for implementing an attenuation characteristic outside of the pass band and the narrow band characteristics, preferably for use as a filter. The surface acoustic wave device includes a piezoelectric substrate, interdigital transducers formed on the piezoelectric substrate, and first and second reflectors disposed on the sides of the interdigital transducers. Each of the first and second reflectors includes an open electrode block with a plurality of electrically independent electrode fingers, and a short electrode block with a plurality of electrode fingers of which both ends are electrically shorted.

摘要翻译： 用于实现通带外的衰减特性和窄带特性的表面声波装置，优选用作滤波器。 表面声波装置包括压电基板，形成在压电基板上的叉指换能器，以及设置在叉指式换能器侧面的第一和第二反射器。 第一和第二反射器中的每一个包括具有多个电独立电极指的开放电极块，以及具有多个电极指的短电极块，其两端电气短路。

公开(公告)号：US07157991B2

公开(公告)日：2007-01-02

申请号：US10746255

申请日：2003-12-29

申请人： Osamu Kawachi ,  Takuya Abe ,  Yasufumi Kaneda ,  Motoyuki Tajima

发明人： Osamu Kawachi ,  Takuya Abe ,  Yasufumi Kaneda ,  Motoyuki Tajima

IPC分类号： H03H9/25 ,  H03H9/64

CPC分类号： H03H9/02771

摘要： A surface acoustic wave device for implementing an attenuation characteristic outside of the pass band and the narrow band characteristics, preferably for use as a filter. The surface acoustic wave device includes a piezoelectric substrate, interdigital transducers formed on the piezoelectric substrate, and first and second reflectors disposed on the sides of the interdigital transducers. Each of the first and second reflectors includes an open electrode block with a plurality of electrically independent electrode fingers, and a short electrode block with a plurality of electrode fingers of which both ends are electrically shorted.

摘要翻译： 用于实现通带外的衰减特性和窄带特性的表面声波装置，优选用作滤波器。 表面声波装置包括压电基板，形成在压电基板上的叉指换能器，以及设置在叉指式换能器侧面的第一和第二反射器。 第一和第二反射器中的每一个包括具有多个电独立电极指的开放电极块，以及具有多个电极指的短电极块，其两端电气短路。

公开(公告)号：US20050057325A1

公开(公告)日：2005-03-17

申请号：US10959173

申请日：2004-10-07

申请人： Osamu Kawachi ,  Motoyuki Tajima ,  Takuya Abe

发明人： Osamu Kawachi ,  Motoyuki Tajima ,  Takuya Abe

IPC分类号： H03H9/00 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/0042 ,  H03H9/0028 ,  H03H9/0061 ,  H03H9/02992 ,  H03H9/14591

摘要： Improvement on an insertion loss, as well as phase balance, is obtained in surface acoustic wave device. In the surface acoustic wave device, when an aperture length of the electrode fingers of an interdigital transducer for input or an interdigital transducer for output is defined as X, the interdigital transducer for input or the interdigital transducer for output includes two split interdigital transducers respectively including electrode fingers having an aperture length of approximately X/2, and electrodes of respective electrode fingers in the first and second split interdigital transducers are extracted from the two split interdigital transducers, and disposed in such a way as signals in the two outputs or inputs connected to a balanced terminal pair have a phase difference of 180°, and the two split interdigital transducers are connected in series by a common electrode of solid shape, of which electrode width is greater than twice the pitch of the electrode fingers in the two split interdigital transducers, and further the common electrode is connected to the ground potential.

摘要翻译： 弹性表面波器件可以获得插入损耗以及相位平衡的改善。 在表面声波装置中，当用于输入的叉指式换能器或用于输出的叉指换能器的电极指的孔径长度被定义为X时，用于输入的叉指换能器或用于输出的叉指式换能器包括两个分叉叉指换能器，分别包括 具有大约X / 2的开口长度的电极指，并且从两个分叉叉指式换能器中提取第一和第二分割叉指式换能器中的各个电极指的电极，并且以与两个输出或输入中的信号相连的方式设置 平衡端子对具有180°的相位差，并且两个分离叉指式换能器通过固体形状的公共电极串联连接，其电极宽度大于两个分叉叉指中电极指的间距的两倍 换能器，另外公共电极连接到地电位。

公开(公告)号：US06965282B2

公开(公告)日：2005-11-15

申请号：US10959173

申请日：2004-10-07

申请人： Osamu Kawachi ,  Motoyuki Tajima ,  Takuya Abe

发明人： Osamu Kawachi ,  Motoyuki Tajima ,  Takuya Abe

IPC分类号： H03H9/00 ,  H03H9/145 ,  H03H9/64

CPC分类号： H03H9/0042 ,  H03H9/0028 ,  H03H9/0061 ,  H03H9/02992 ,  H03H9/14591

摘要： Improvement on an insertion loss, as well as phase balance, is obtained in surface acoustic wave device. In the surface acoustic wave device, when an aperture length of the electrode fingers of an interdigital transducer for input or an interdigital transducer for output is defined as X, the interdigital transducer for input or the interdigital transducer for output includes two split interdigital transducers respectively including electrode fingers having an aperture length of approximately X/2, and electrodes of respective electrode fingers in the first and second split interdigital transducers are extracted from the two split interdigital transducers, and disposed in such a way as signals in the two outputs or inputs connected to a balanced terminal pair have a phase difference of 180°, and the two split interdigital transducers are connected in series by a common electrode of solid shape, of which electrode width is greater than twice the pitch of the electrode fingers in the two split interdigital transducers, and further the common electrode is connected to the ground potential.

摘要翻译： 弹性表面波器件可以获得插入损耗以及相位平衡的改善。 在表面声波装置中，当用于输入的叉指式换能器或用于输出的叉指换能器的电极指的孔径长度被定义为X时，用于输入的叉指换能器或用于输出的叉指式换能器包括两个分叉叉指换能器，分别包括 具有大约X / 2的开口长度的电极指，并且从两个分叉叉指式换能器中提取第一和第二分割叉指式换能器中的各个电极指的电极，并且以与两个输出或输入中的信号相连的方式设置 平衡端子对具有180°的相位差，并且两个分离叉指式换能器通过固体形状的公共电极串联连接，其电极宽度大于两个分叉叉指中电极指的间距的两倍 换能器，另外公共电极连接到地电位。