公开(公告)号：US20080122554A1

公开(公告)日：2008-05-29

申请号：US11766868

申请日：2007-06-22

申请人： Tetsuro HARADA ,  Naoto YAMAGUCHI ,  Naoki NAKAYAMA ,  Takanori UEJIMA ,  Hidehiro TAKANO ,  Koki SAITO

发明人： Tetsuro HARADA ,  Naoto YAMAGUCHI ,  Naoki NAKAYAMA ,  Takanori UEJIMA ,  Hidehiro TAKANO ,  Koki SAITO

IPC分类号： H03H7/42

CPC分类号： H04B1/006 ,  H03H9/0561 ,  H03H9/46 ,  H03H9/70 ,  H03H2250/00

摘要： A balanced/unbalanced filter module includes a switch including a first port that inputs and outputs unbalanced signals in a first frequency band, a second port that inputs and outputs unbalanced signals in a second frequency band, and a third port that inputs and outputs unbalanced signals in these two frequency bands. The switch switches a signal path. An unbalanced I/O port of a first filter that passes signals in the first frequency band is connected to the port. A port of a second filter that passes signals in the second frequency band is connected to the port. Individual balanced I/O ports of each of the first and second filters are connected to first and second branch ports with substantially the same electrical length. A balance coil for impedance matching is provided between the first and second branch ports.

摘要翻译： 平衡/不平衡滤波器模块包括开关，其包括在第一频带中输入和输出不平衡信号的第一端口，在第二频带中输入和输出不平衡信号的第二端口以及输入和输出不平衡信号的第三端口 在这两个频段。 开关切换信号路径。 将第一频带中的信号通过的第一滤波器的不平衡I / O端口连接到端口。 将第二频带中的信号通过的第二滤波器的端口连接到端口。 第一和第二滤波器中的每一个的各个平衡I / O端口以大致相同的电长度连接到第一和第二分支端口。 用于阻抗匹配的平衡线圈设置在第一和第二分支端口之间。