公开(公告)号：US4978879A

公开(公告)日：1990-12-18

申请号：US384829

申请日：1989-07-25

申请人： Kiyoshi Satoh ,  Yoshiro Fujiwara ,  Kazushi Hashimoto

发明人： Kiyoshi Satoh ,  Yoshiro Fujiwara ,  Kazushi Hashimoto

IPC分类号： H03H9/02

CPC分类号： H03H9/02834 ,  H03H9/02559

摘要： An acoustic surface wave element having an oscillation frequency stable against temperature changes, and a wide range of oscillation frequency adjustment, is provided by an acoustic surface wave element comprising: a substrate of a 36.degree. rotated Y-cut single crystal lithium tantalate having X, Y and Z crystal axes and a top surface and side walls; electrodes formed on the top surface of the substrate such that an acoustic surface wave is propagated in a direction of the X-axis of the substrate and an oscillation of the acoustic surface wave occurs at a predetermined frequency, the electrodes having a thickness equal to 1 to 4% of a wavelength of the acoustic surface wave at the oscillation; and a plasma CVD-deposited layer of silicon dioxide covering the electrodes and the substrate, the silicon dioxide layer having a refractive index of 1.445 to 1.486 and a thickness equal to 16 to 26% of the wavelength of the acoustic surface wave at the oscillation.

公开(公告)号：US6115592A

公开(公告)日：2000-09-05

申请号：US700099

申请日：1996-08-20

申请人： Masanori Ueda ,  Osamu Ikata ,  Hideki Ohmori ,  Yoshiro Fujiwara ,  Kazushi Hashimoto

发明人： Masanori Ueda ,  Osamu Ikata ,  Hideki Ohmori ,  Yoshiro Fujiwara ,  Kazushi Hashimoto

IPC分类号： H03H9/25 ,  H03H7/38 ,  H03H9/05 ,  H03H9/145 ,  H03H9/64 ,  H03H9/72 ,  H04B1/52 ,  H04B5/00 ,  H04B1/10

CPC分类号： H03H9/6476 ,  H03H9/0576 ,  H03H9/6483 ,  H03H9/72 ,  H03H9/725 ,  H04B1/52 ,  H04B5/00 ,  H03H2240/00 ,  H03H2250/00 ,  H04B5/0012 ,  H04B5/0093

摘要： A filter device includes at least two filter elements provided in a package, each of the filter elements passing only signals within a predetermined frequency band, the predetermined frequency bands of the filter elements having center frequencies which are distinct from each other. An input terminal is connected to and shared by respective inputs of the filter elements. An output terminal is connected to and shared by respective outputs of the filter elements.

摘要翻译： 滤波器装置包括设置在封装中的至少两个滤波器元件，每个滤波器元件仅通过预定频带内的信号，滤波器元件的预定频带具有彼此不同的中心频率。 输入端子连接到滤波器元件的相应输入端并由其共享。 输出端子连接到滤波器元件的相应输出端并由其共用。

公开(公告)号：US5914646A

公开(公告)日：1999-06-22

申请号：US834768

申请日：1997-04-03

申请人： Kazushi Hashimoto

发明人： Kazushi Hashimoto

IPC分类号： H03H9/145 ,  H01L41/00 ,  H03H9/25 ,  H03H9/64 ,  H03H9/10

CPC分类号： H03H9/1071 ,  H03H9/6483

摘要： A surface acoustic wave filter element is formed by replacing with a single parallel resonator having a driving electrode whose area is equal to the sum total of the areas of driving electrodes of a plurality of consecutive parallel resonators arranged in a ladder shape, together with serial resonators, for structuring a surface acoustic wave resonator. Also, in a surface acoustic wave filter formed by packaging the surface acoustic wave filter element, ground electrodes of the parallel resonators of the filter element are electrically insulated from each other and are connected to different electrode pads for grounding.

摘要翻译： 表面声波滤波器元件通过用具有驱动电极的单个并联谐振器代替，该驱动电极的面积等于以梯形形式布置的多个连续并联谐振器的驱动电极的面积的总和等于串联谐振器 ，用于构造表面声波谐振器。 此外，在通过封装声表面波滤波器元件形成的表面声波滤波器中，滤波器元件的并联谐振器的接地电极彼此电绝缘并且连接到不同的接地用电极焊盘。

公开(公告)号：US5786738A

公开(公告)日：1998-07-28

申请号：US652642

申请日：1996-05-31

申请人： Osamu Ikata ,  Nobuo Hirasawa ,  Kazushi Hashimoto ,  Masanori Ueda ,  Yoshio Satoh

发明人： Osamu Ikata ,  Nobuo Hirasawa ,  Kazushi Hashimoto ,  Masanori Ueda ,  Yoshio Satoh

IPC分类号： H03H9/05 ,  H03H9/72

CPC分类号： H03H9/0576 ,  H03H9/72 ,  H03H9/725

摘要： In a duplexer, phase matching circuit patterns corresponding to filter chips are formed on a surface layer of a multi-layer ceramic package provided with filter chips having different central frequencies. An end of each of the phase matching circuit patterns is connected to a common terminal pattern.

摘要翻译： 在双工器中，在设置有具有不同中心频率的滤波器芯片的多层陶瓷封装的表面层上形成对应于滤波器芯片的相位匹配电路图案。 每个相位匹配电路图案的一端连接到公共端子图案。