Patent ID: 11962285
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An acoustic wave device comprising:
a piezoelectric substrate;
an antenna terminal provided on the piezoelectric substrate and electrically connected to an antenna;
a signal terminal provided on the piezoelectric substrate, to which a signal is input, or from which a signal is output; and
a plurality of resonators provided on the piezoelectric substrate and each including an IDT electrode; wherein
the plurality of resonators include a plurality of series arm resonators and at least one longitudinally coupled resonator on a series arm electrically connecting the antenna terminal to the signal terminal; and
a duty of the IDT electrode of a series arm resonator closest to the antenna terminal among the plurality of series arm resonators is smaller than duties of all of the IDT electrodes of the plurality of series arm resonators and the at least one longitudinally coupled resonator on the series arm electrically connecting the antenna terminal to the signal terminal.