Resonance device

A resonance device comprising:

• a resonator including a plurality of upper electrodes, a lower electrode, and a piezoelectric film disposed between the upper electrodes and the lower electrode;
• a substrate having a first surface that faces the plurality of upper electrodes of the resonator;
• a first power supply terminal disposed on a second surface of the substrate opposite the first surface, with the first power supply terminal being electrically connected to a first upper electrode of the plurality of upper electrodes;
• a second power supply terminal disposed on the second surface of the substrate and being electrically connected to a second upper electrode of the plurality of upper electrodes;
• and
• a ground terminal disposed on the second surface and electrically connected to the lower electrode,
• wherein an area of the first power supply terminal relative to a plan view of the second surface is different than an area of the second power supply terminal relative to the plan view, such that a capacitance formed between the first power supply terminal and the ground terminal is in a range from −50% to +50% of a capacitance formed between the second power supply terminal and the ground terminal.