BRANCHING FILTER, COMMUNICATION MODULE COMPONENT, AND COMMUNICATION DEVICE

摘要

Provided are a branching filter capable of improving an isolation characteristic and an attenuation characteristic, and a communication device using the same. The branching filter comprising an antenna terminal (4), a first terminal (1), and second terminals (2, 3) is provided with a first filter (5) which is arranged between the antenna terminal (4) and the first terminal (1) and includes parallel resonators for constituting a ladder filter circuit, a second filter (6) which is arranged between the antenna terminal (4) and the second terminal (2) and has a passing frequency band higher than the passing frequency band of the first filter (5), and an electromagnetic coupling device (8) which is electromagnetically coupled to the antenna terminal (4).