Acoustic wave device

An acoustic wave device comprising:

• a plurality of acoustic wave resonators each including a piezoelectric substrate including a piezoelectric body layer, and an interdigital transducer (IDT) electrode on the piezoelectric substrate and including a plurality of electrode fingers;
• wherein
• at least one of the plurality of acoustic wave resonators is an excitation angle change resonator;
• in the excitation angle change resonator, the piezoelectric body layer includes a propagation axis, and the plurality of electrode fingers are curved;
• in the excitation angle change resonator, an excitation direction of an acoustic wave in a portion of an electrode finger of the plurality of electrode fingers is one of a first direction perpendicular or substantially perpendicular to an extending direction of the electrode finger, a second direction connecting a shortest distance between the electrode finger and an electrode finger of the plurality of adjacent to the electrode finger, and a third direction of an electric field vector generated between the electrode finger and the electrode finger adjacent to the electrode finger;
• in the excitation angle change resonator, when an angle between the excitation direction and an extending direction of the propagation axis is defined as an excitation angle, the excitation angle is not uniform in the IDT electrode;
• the plurality of acoustic wave resonators are connected to each other in series or in parallel;
• other elements are not connected between the plurality of acoustic wave resonators;
• and
• a circuit of the acoustic wave device is not branched between the plurality of acoustic wave resonators.