| 摘要 |
<p>[Problem] To provide a branching filter capable of improving isolation characteristics while suppressing degradation of attenuation characteristics. [Solution] A branching filter provided with: a terminal group comprising an antenna terminal (4), a transmission signal terminal (1), received signal terminals (2 and 3) and a ground terminal (G); a transmission filter (5) positioned between the antenna terminal (4) and the transmission signal terminal (1); a second filter (6) positioned between the antenna terminal (4) and the received signal terminals (2 and 3); a first connection wire (51) for connecting parallel resonators (67 and 68) and ground terminals (G); a second connection wire (52) for connecting the receiving filter (6) and a ground terminal (G); and a third connection wire (53) which connects the first connection wire (51) and the second connection wire (52), and which electromagnetically couples at least one of the resonators and wires configuring the transmission filter (5).</p> |
