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    SURFACE ACOUSTIC WAVE FILTER, BALANCED TYPE CIRCUIT, AND COMMUNICATION APPARATUS
    2.
    发明公开
    SURFACE ACOUSTIC WAVE FILTER, BALANCED TYPE CIRCUIT, AND COMMUNICATION APPARATUS 审中-公开
    具有平衡信号和通讯器件表面滤波器电路

    公开(公告)号：EP1481474A1

    公开(公告)日：2004-12-01

    申请号：EP03710233.2

    申请日：2003-03-03

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： NAKAMURA, Hiroyuki ,  ONISHI, Keiji ,  INOUE, Takashi

    IPC分类号： H03H9/02

    CPC分类号： H03H9/0038 ,  H03H9/0042 ,  H03H9/02574 ,  H03H9/02952

    摘要： A sufficient balance characteristic cannot be obtained for a surface acoustic wave filter.________________________________________The surface acoustic wave filter includes a piezoelectric substrate 200, IDT electrodes 210 which are formed on the piezoelectric substrate 200 and are connected to balanced type terminals 261 and 262, IDT electrodes 220 and 230 which are formed on the piezoelectric substrate 200 and are connected to an unbalanced type terminal 271, connection electrodes 281, 282, and 291 of connecting the IDT electrodes 210, the IDT electrodes IDT electrodes 220 and 230 to the balanced type terminals 261 and 262 or the unbalanced type terminal 271, and a dielectric thin film 201 formed beetween the piezoelectric substrate 200 and the IDT electrodes 210, the IDT electrodes 220 and 230, the connection electrodes 281, 282, and 291.

    ELASTIC WAVE FILTER AND COMMUNICATION DEVICE USING THE SAME
    3.
    发明公开
    ELASTIC WAVE FILTER AND COMMUNICATION DEVICE USING THE SAME 有权
    弹性波滤波器及通信设备

    公开(公告)号：EP1739830A4

    公开(公告)日：2009-04-22

    申请号：EP05728857

    申请日：2005-04-04

    申请人： MURATA MANUFACTURING CO

    发明人： SHIBAHARA TERUHISA ,  TANI MASAKAZU ,  SHIN YASUAKI

    IPC分类号： H03H9/64 ,  H03H9/00 ,  H03H9/02 ,  H03H9/145

    CPC分类号： H03H9/0222 ,  H03H9/0061 ,  H03H9/02952 ,  H03H9/14588 ,  H03H9/6469

    摘要： On a piezoelectric substrate, there are formed a plurality of longitudinally-connected resonator type elastic wave filter elements, which are cascade-connected so as to constitute an elastic wave filter. By reducing the adverse affect of the parasitic capacitance coming into the cascade connection between the longitudinally-connected resonator type elastic wave filter elements, it is possible to improve the impedance matching at the cascade connection point and improve VSWR at the elastic wave filter I/O terminal. The elastic wave filter (350) includes a piezoelectric substrate (300) having a cascade connection of two longitudinally-connected resonator type elastic wave filters (306, 312), each connecting three IDT (302, 303, 304; 308, 309, 310) formed along the propagation direction of the elastic wave. At least in one of the longitudinally-connected resonator type elastic wave filters (306, 311), the IDT (302, 304; 308, 310) have an electrode finger pitch smaller than the electrode finger pitch of the other IDT (303; 309).

    Surface acoustic wave filter, balanced type filter and communication device
    5.
    发明公开
    Surface acoustic wave filter, balanced type filter and communication device 有权
    表面声波滤波器，对称滤波器和通信设备

    公开(公告)号：EP1263137A2

    公开(公告)日：2002-12-04

    申请号：EP02011843.6

    申请日：2002-05-28

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Nakamura, Hiroyuki ,  Mita, Narihiro ,  Tsuzuki, Shigeru ,  Yamada, Toru

    IPC分类号： H03H9/64

    CPC分类号： H03H9/0042 ,  H03H9/0038 ,  H03H9/0061 ,  H03H9/02952 ,  H03H9/14588

    摘要： (Problems)
    There is a problem of degradation in balance characteristics with a longitudinal mode type surface acoustic wave filter having unbalanced-balanced type terminals.
    (Constitution)
    A longitudinal mode type surface acoustic wave filter comprising a first IDT electrode 102, second and third IDT electrodes 103 and 104, and first and second reflector electrodes 105 and 106 is formed on a piezoelectric substrate 101. The upper electrode 102a of the first IDT electrode 102 is connected to one of balanced type terminals 107, and the lower electrode 102b of the first IDT electrode 102 is connected to the other balanced type terminal 108. Also, the lower electrode 103a of the second IDT electrode 103 is connected to an unbalanced type terminal 109, and the lower electrode 103b is grounded. The lower electrode 104b of the third IDT electrode 104 is connected to the unbalanced type terminal 109, and the upper electrode 103a is grounded.

    Elastic wave filter
    6.
    发明授权
    Elastic wave filter 有权
    与弹性波滤波器

    公开(公告)号：EP1739830B1

    公开(公告)日：2012-05-02

    申请号：EP05728857.3

    申请日：2005-04-04

    申请人： MURATA MANUFACTURING CO., LTD.

    发明人： SHIBAHARA, Teruhisa, c/o Murata Manufacturing Co., Ltd. ,  TANI, Masakazu, c/o Murata Manufacturing Co., Ltd. ,  SHIN, Yasuaki, c/o Murata Manufacturing Co., Ltd.

    IPC分类号： H03H9/00 ,  H03H9/64 ,  H03H9/02

    CPC分类号： H03H9/0222 ,  H03H9/0061 ,  H03H9/02952 ,  H03H9/14588 ,  H03H9/6469

    摘要： On a piezoelectric substrate, there are formed a plurality of longitudinally-connected resonator type elastic wave filter elements, which are cascade-connected so as to constitute an elastic wave filter. By reducing the adverse affect of the parasitic capacitance coming into the cascade connection between the longitudinally-connected resonator type elastic wave filter elements, it is possible to improve the impedance matching at the cascade connection point and improve VSWR at the elastic wave filter I/O terminal. The elastic wave filter (350) includes a piezoelectric substrate (300) having a cascade connection of two longitudinally-connected resonator type elastic wave filters (306, 312), each connecting three IDT (302, 303, 304; 308, 309, 310) formed along the propagation direction of the elastic wave. At least in one of the longitudinally-connected resonator type elastic wave filters (306, 311), the IDT (302, 304; 308, 310) have an electrode finger pitch smaller than the electrode finger pitch of the other IDT (303; 309).

    Elastic wave device
    7.
    发明公开
    Elastic wave device 审中-公开
    Vorrichtung mit elastischen Wellen arbeitend

    公开(公告)号：EP2432122A2

    公开(公告)日：2012-03-21

    申请号：EP11180400.1

    申请日：2011-09-07

    申请人： Nihon Dempa Kogyo Co., Ltd.

    发明人： Yoshimoto, Susumu

    IPC分类号： H03H9/02 ,  H03H9/145 ,  H03H9/64

    CPC分类号： H03H9/02921 ,  H03H9/02952 ,  H03H9/14544 ,  H03H9/6436 ,  H03H9/6466

    摘要： There is provided an elastic wave device that is capable of suppressing deterioration in flatness of a frequency characteristic in a pass frequency band yet has excellent ESD resistance. At positions apart from a crossing area of electrode fingers (12), toward a busbar (11), first float dummy electrodes (16), and a second float dummy electrode (18) are provided between adjacent IDT electrodes (1), and between the IDT electrode (1) and a grating reflector (2) which are adjacent to each other. These float dummy electrodes (16,18) are in a state of electrically floating from other regions, and these float dummy electrodes (16,18) are formed so as to correspond to an arrangement pattern of the electrode fingers (12) in the IDT electrode (1).

    摘要翻译： 提供了能够抑制通过频带中的频率特性的平坦度劣化但具有优异的耐ESD性的弹性波装置。 在电极指（12）的交叉区域与母线（11）分开的位置处，在相邻的IDT电极（1）之间设置有第一浮置虚拟电极（16）和第二浮动虚拟电极（18） IDT电极（1）和光栅反射器（2）彼此相邻。 这些浮置虚拟电极（16,18）处于与其他区域电浮动的状态，并且这些浮动虚拟电极（16,18）形成为对应于IDT中的电极指（12）的布置图案 电极（1）。

    Duplexer
    8.
    发明公开
    Duplexer 审中-公开
    双工器

    公开(公告)号：EP2144368A1

    公开(公告)日：2010-01-13

    申请号：EP09164932.7

    申请日：2009-07-08

    申请人： Nihon Dempa Kogyo Co., Ltd.

    发明人： Kawamoto, Toshihiko ,  Yoshimoto, Susumu

    IPC分类号： H03H9/00 ,  H03H9/72 ,  H03H9/70

    CPC分类号： H03H9/02952 ,  H03H9/725

    摘要： To provide a duplexer (1) which is small in size and excellent in separation characteristic of transmission/reception signals. An antenna port (2) is disposed on a center of a rearward side in a disposition area of a duplexer (1), a high band side filter (4) and a low band side filter (3) are respectively disposed on a left side and a right side of the antenna port (2), a parallel arm (32a) at a last stage in the low band side filter (3), a parallel arm (42c) at a last stage in the high band side filter (4), a first signal port (5) and a second signal port (6) seen from the antenna port are positioned on a forward side of the antenna port, a ground side (33c) of a parallel arm (32c) on a front stage side of the parallel arm (32a) at the last stage in the low band side filter (3) and a ground side (43a) of a parallel arm (42a) on a front stage side of the parallel arm (42c) at the last stage in the high band side filter (4) are mutually connected via a conductive path formed on a piezoelectric substrate (10) at a rearward side of the antenna port (2), and the parallel arms connected by the conductive path are positioned on the rearward side of the parallel arms at the last stages. Accordingly, a separation characteristic at a high band side is improved.

    摘要翻译： 提供一种尺寸小，发送/接收信号的分离特性优异的双工器（1）。 天线端口（2）设置在双工器（1）的配置区域中的后侧的中心，高频带侧滤波器（4）和低频带侧滤波器（3）分别设置在左侧 和天线端口（2）的右侧，低频侧滤波器（3）中的最后级的平行臂（32a），高频带侧滤波器（4）中的最后级的并联臂（42c） ），从天线端口看到的第一信号端口（5）和第二信号端口（6）位于天线端口的前侧，前面的平行臂（32c）的接地侧（33c） 在平行臂（42c）的前级侧的平行臂（42a）的接地侧（43a）处于低频带侧滤波器（3）的最后级的平行臂（32a）的侧面 高频带侧滤波器（4）中的级通过形成在天线端口（2）的后侧的压电基板（10）上的导电路径相互连接，并且由导电路径连接的并联臂为p 在最后阶段在平行臂的后侧开口。 因此，高带侧的分离特性提高。

    Surface acoustic wave filter, balanced type filter and communication device
    10.
    发明公开
    Surface acoustic wave filter, balanced type filter and communication device 有权
    AkustischesOberflächenwellenfilter，对称筛选和公共关系

    公开(公告)号：EP1263137A3

    公开(公告)日：2011-08-03

    申请号：EP02011843.6

    申请日：2002-05-28

    申请人： Panasonic Corporation

    发明人： Nakamura, Hiroyuki ,  Mita, Narihiro ,  Tsuzuki, Shigeru ,  Yamada, Toru

    IPC分类号： H03H9/64

    CPC分类号： H03H9/0042 ,  H03H9/0038 ,  H03H9/0061 ,  H03H9/02952 ,  H03H9/14588

    摘要： (Problems)
    There is a problem of degradation in balance characteristics with a longitudinal mode type surface acoustic wave filter having unbalanced-balanced type terminals.
    (Constitution)
    A longitudinal mode type surface acoustic wave filter comprising a first IDT electrode 102, second and third IDT electrodes 103 and 104, and first and second reflector electrodes 105 and 106 is formed on a piezoelectric substrate 101. The upper electrode 102a of the first IDT electrode 102 is connected to one of balanced type terminals 107, and the lower electrode 102b of the first IDT electrode 102 is connected to the other balanced type terminal 108. Also, the lower electrode 103a of the second IDT electrode 103 is connected to an unbalanced type terminal 109, and the lower electrode 103b is grounded. The lower electrode 104b of the third IDT electrode 104 is connected to the unbalanced type terminal 109, and the upper electrode 103a is grounded.

    摘要翻译： （问题）具有不平衡型端子的纵模式表面声波滤波器存在平衡特性劣化的问题。 （构成）在压电基板101上形成包括第一IDT电极102，第二和第三IDT电极103,104以及第一和第二反射器电极105和106的纵向模式型表面声波滤波器。 第一IDT电极102连接到平衡型端子107中的一个，并且第一IDT电极102的下部电极102b连接到另一个平衡型端子108.另外，第二IDT电极103的下部电极103a连接到 不平衡型端子109，下电极103b接地。 第三IDT电极104的下部电极104b与不平衡型端子109连接，上部电极103a接地。