US 2016/0164491 A1Published application

High-frequency module

AssigneeMurata Manufacturing Co., Ltd.

InventorHideki MUTO

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Abstract

In a high-frequency module, a phase and amplitude of a high-frequency signal from a connection conductor between filter devices change due to the signal being transmitted by a takeout circuit unit. When the high-frequency signal at a third external connection terminal is a suppression signal and a high-frequency signal passing through the first filter circuit is a suppression-target signal, the transmission distance in the takeout circuit unit is such that the phase of the suppression signal is approximately inverted with respect to the phase of the suppression-target signal and the suppression signal has approximately the same amplitude as the suppression-target signal. The suppression signal is mixed with the suppression-target signal and components outside of the pass band are cancelled out and the attenuation characteristics of the filter circuit are enhanced.

Claims20

Dependent claims

A high-frequency module comprising:

a first external connection terminal to which a high-frequency signal is input;
a second external connection terminal outputting a high-frequency signal;
and
a high-frequency signal processing unit connected between the first external connection terminal and the second external connection terminal;
wherein
the high-frequency signal processing unit includes:
a first filter circuit including a plurality of filter devices connected in series between the first external connection terminal and the second external connection terminal;
and
a takeout circuit unit one end of which is connected directly or through electromagnetic field coupling with a connection conductor connected to one of the plurality of filter devices of the first filter circuit and the other end of which is connected to a third external connection terminal;
wherein
the third external connection terminal is connected to the second external connection terminal.

8 more elements

Dependencies are inferred from the claim text.