Acoustic wave device and module including the same

An acoustic wave device, comprising:

• a piezoelectric layer having a main surface;
• a plurality of series resonators formed on said main surface of said piezoelectric layer;
• and
• a plurality of parallel resonators formed on said main surface of said piezoelectric layer,
• wherein said series resonators include a first series resonator and a second series resonator, each of said first and second series resonators including a plurality of series-divided resonators;
• wherein one of said series-divided resonators of said first series resonator which is disposed at a position where an electric signal is input first, has a first anti-resonance frequency;
• and
• wherein one of said series-divided resonators of said second series resonator which is centrally disposed has a second anti-resonance frequency, said first anti-resonance frequency being lower than said second anti-resonance frequency.

An acoustic wave device, comprising:

• a piezoelectric layer having a main surface;
• a plurality of series resonators formed on said main surface of said piezoelectric layer;
• and
• a plurality of parallel resonators formed on said main surface of said piezoelectric layer,
• wherein each of said series resonators and said parallel resonators includes an interdigital transducer having an interdigital transducer electrode having a plurality of electrode fingers, said series resonators including a first series resonator and a second series resonator, each of said first series resonator and said second series resonator having a plurality of series-divided resonators, said electrode fingers of said one of series-divided resonators of said first series resonator which is disposed at a position where an electric signal is input first being greater in number than said electrode fingers of said one of said series-divided resonators of said second series resonator which is centrally disposed.