HIGH-FREQUENCY MODULE

摘要

A filter unit of a high-frequency module includes a plurality of SAW resonators connected in series between a first series connection terminal and a second series connection terminal, first shunt connection terminals, a second shunt connection terminal, and a plurality of SAW resonators. A connection line interconnecting the SAW resonators is connected to the first shunt connection terminal through one of the SAW resonators. The first shunt connection terminal is connected to a ground through an inductor. A matching circuit is connected between the second series connection terminal and a second external connection terminal. The matching circuit is inductively or capacitively coupled to the inductor.

主权项

1. A high-frequency module comprising:
a first external connection terminal; a second external connection terminal; a filter unit connected between the first external connection terminal and the second external connection terminal; a matching circuit connected between at least one of the first external connection terminal and the second external connection terminal and the filter unit; and an inductor connected between a ground and the filter unit; wherein the filter unit includes:
a first series connection terminal connected to the first external connection terminal;a second series connection terminal connected to the second external connection terminal;a plurality of series-connected filter elements connected in series between the first series connection terminal and the second series connection terminal through a plurality of connection lines;a shunt connection terminal connected to the ground through the inductor and connected to one of the plurality of connection lines; anda shunt-connected filter element connected between one of the plurality of connection lines to which the shunt connection terminal is connected and the shunt connection terminal;the inductor and the matching circuit are inductively or capacitively coupled to each other.