Patent ID: 11929736
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A multiplexer comprising:
an antenna terminal;
an inductance element;
a first acoustic wave filter connected to the antenna terminal and having a first pass band; and
a second acoustic wave filter connected to the antenna terminal through the inductance element and having a second pass band; wherein
a center frequency of the second pass band is higher than a center frequency of the first pass band;
the second acoustic wave filter includes a plurality of parallel arm resonance portions including a first parallel arm resonance portion connected closest to the inductance element;
an electrostatic capacitance of the first parallel arm resonance portion is larger than an electrostatic capacitance of any other parallel arm resonance portions of the plurality of parallel arm resonance portions;
the first parallel arm resonance portion is connected to the inductance element without another parallel arm electrostatic capacitance element connected between the first parallel arm resonance portion and the inductance element; and
the first parallel arm resonance portion is connected to antenna terminal without either of another electrostatic capacitance element or another inductance element, in addition to the inductance element, connected between the first parallel arm resonance portion and the antenna terminal.