Surface acoustic wave device and surface acoustic wave filter

A surface acoustic wave device comprising:

• a piezoelectric substrate;
• at least a first resonator group;
• and
• at least a second resonator group;
• wherein
• the first resonator group and the second resonator group are connected in parallel to each other and include surface acoustic wave resonators each including an interdigital transducer electrode provided on the piezoelectric substrate;
• the first resonator group includes at least one surface acoustic wave resonator;
• the second resonator group includes a greater number of surface acoustic wave resonators than the at least one surface acoustic wave resonator in the first resonator group, the surface acoustic wave resonators in the second resonator group being connected in series;
• a resonant frequency of the at least one surface acoustic wave resonator in the first resonator group is higher than a resonant frequency of the surface acoustic wave resonators in the second resonator group;
• and
• a combined capacitance of the first resonator group and the second resonator group is equal or substantially equal to a capacitance of an undivided resonator that is equivalent to divided resonator groups including the first and second resonator groups.