Elastic wave resonator, elastic wave filter, and antenna sharing device using the same

An acoustic wave resonance device comprising:

• a piezoelectric substrate;
• a first acoustic wave resonator provided on an upper surface of the piezoelectric substrate and including a first interdigital transducer electrode;
• and
• a second acoustic wave resonator provided on the upper surface of the piezoelectric substrate and including a second interdigital transducer electrode,
• wherein the first acoustic wave resonator and the second acoustic wave resonator are connected to each other, and
• when an overlap width of a plurality of comb-shaped electrodes forming the first acoustic wave resonator is represented by L1, L2 that is an overlap width of a plurality of comb-shaped electrodes forming the second acoustic wave resonator satisfies a following mathematical formula:
• L2=L1+(n+½)SC
• wherein n represents an integer, and SC represents an amount of change of an overlap width in which transverse mode spurious responses are generated in a same frequency in the first acoustic wave resonator.