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2. 发明公开

KR1020070086776A 평형-불평형형 필터 모듈 및 통신 장치 有权
标题翻译：平衡不平衡滤波器模块和通信设备
公开(公告)号：KR1020070086776A
公开(公告)日：2007-08-27
申请号：KR1020077014838
申请日：2005-12-16
申请人： 가부시키가이샤 무라타 세이사쿠쇼
发明人： 하라다테츠로 , 야마구치나오토 , 나카야마나오키 , 우에지마타카노리 , 타카노히데히로 , 사이토코키
IPC分类号： H03H9/70 , H03H9/72
CPC分类号： H04B1/006 , H03H9/0561 , H03H9/46 , H03H9/70 , H03H2250/00
摘要： There is included a switch (SW) that has a first port (P1) for inputting/outputting unbalance signals of a first frequency band, a second port (P2) for inputting/outputting unbalance signals of a second frequency band, and a third port (P3) common to the unbalance signals of these two frequency bands, and that switches signal paths. The port (P1) is connected to an unbalance input/output port (P4) of a first filter (F1) that passes the signals of the first frequency band. The port (P2) is connected to a port (P7) of a second filter (F2) that passes the signals of the second frequency band. The balance input/output ports of the first filter (F1) are connected to the respective balance input/output ports of the second filter (F2) at respective first and second branch ports (B1,B2) by use of approximately equal electrical lengths. An impedance-matching balance coil (BC) is connected between the first and second branch ports.
摘要翻译：包括开关（SW），其具有用于输入/输出第一频带的不平衡信号的第一端口（P1），用于输入/输出第二频带的不平衡信号的第二端口（P2），以及第三端口（P3），这些两个频带的不平衡信号共同，并且切换信号路径。端口（P1）连接到通过第一频带的信号的第一滤波器（F1）的不平衡输入/输出端口（P4）。端口（P2）连接到通过第二频带的信号的第二滤波器（F2）的端口（P7）。第一滤波器（F1）的平衡输入/输出端口通过使用大致相等的电长度在相应的第一和第二分支端口（B1，B2）处连接到第二滤波器（F2）的相应的平衡输入/输出端口。阻抗匹配平衡线圈（BC）连接在第一和第二分支端口之间。

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