CPC H03H 9/72 (2013.01) [H03F 3/19 (2013.01); H03H 9/02559 (2013.01); H03H 9/02866 (2013.01); H03H 9/145 (2013.01); H03H 9/25 (2013.01); H03H 9/6496 (2013.01); H04B 1/40 (2013.01); H03F 2200/451 (2013.01)] | 20 Claims |
1. A multiplexer comprising:
a first filter on a first path connecting a common terminal and a first terminal; and
a second filter on a second path connecting the common terminal and a second terminal, the second filter having a passband that overlaps a generation frequency of a Rayleigh wave ripple in the first filter; wherein
the first filter includes:
a plurality of series arm resonators on the first path; and
a first parallel arm resonator between a connection node provided on the first path and ground, the connection node being provided on a side closer to the first terminal than a first series arm resonator, the first series arm resonator being one of the plurality of series arm resonators connected closest to the common terminal;
the plurality of series arm resonators and the first parallel arm resonator utilize an SH wave as a main mode; and
a number of electrode finger pairs of the first series arm resonator is fewest among numbers of electrode finger pairs of the plurality of series arm resonators.
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