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1. 发明公开

EP2151922A1 DUPLEXER AND ELASTIC WAVE DEVICE 审中-公开
标题翻译：双工器和弹性波装置
公开(公告)号：EP2151922A1
公开(公告)日：2010-02-10
申请号：EP08738773.4
申请日：2008-03-24
申请人： Murata Manufacturing Co. Ltd.
发明人： YONEKURA, Hiroshi
IPC分类号： H03H9/72 , H03H9/25
CPC分类号： H03H9/644 , H03H9/0076 , H03H9/0085 , H03H9/0576 , H03H9/564 , H03H9/6483 , H03H9/725
摘要： A duplexer which can improve isolation characteristics between first and second balanced terminals of a reception filter chip is obtained. In a duplexer (1), a transmission elastic wave filter (3) and a reception elastic wave filter (4) are mounted on a laminated substrate (2), a coil connected between an antenna terminal and a ground potential is formed on the laminated substrate (2), the reception elastic wave filter (4) has first and second ground pads (10 and 11) connected to ground potentials of IDTs connected to first and second balanced terminals (32 and 33), the distance between the second ground pad (11) and the coil is set to be larger than the distance between the first ground pad (10) and the coil, and an inductance component in a conductive path (E) connecting the second ground pad (11) to the second ground terminal (35) is set to be smaller than an inductance component in a conductive path (D) connecting the first ground pad (10) to the first ground terminal (34).
摘要翻译：获得可以提高接收滤波器芯片的第一和第二平衡端子之间的隔离特性的双工器。在双工器（1）中，发送弹性波滤波器（3）和接收弹性波滤波器（4）被安装在层叠基板（2）上，连接在天线端子和接地电位之间的线圈形成在层叠基板2上，接收型弹性波滤波器4具有与连接于第一和第二平衡端子32,33的IDT的接地电位连接的第一和第二接地焊盘10,11，（11），并且所述线圈被设定为大于所述第一接地焊盘（10）与所述线圈之间的距离，并且在将所述第二接地焊盘（11）连接到所述第二接地端子的导电路径（E）中的电感部件（35）被设定为小于连接所述第一接地焊盘（10）和所述第一接地端子（34）的导电路径（D）中的电感分量。

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