| 摘要 |
PROBLEM TO BE SOLVED: To provide an elastic wave device that is small-sized and in which a frequency fluctuation due to a change with time hardly occurs, and to provide electronic equipment using the elastic wave device. SOLUTION: A trapping energy mode portion 2 provided in an elastic wave waveguide 10 made of a piezoelectric material excites a second elastic wave being an elastic wave in a trapping energy mode by a specific frequency component included in a first elastic wave being an elastic wave such as a SAW propagated from a first propagation mode portion 4, and a cutoff portion 3 provided in a peripheral region of the trapping energy mode portion 2 includes a cutoff frequency being a frequency higher than that of the second elastic wave. A second propagation mode portion mode-converts the second elastic wave leaked through the cutoff portion into a third elastic wave being the elastic wave in the propagation mode to propagate the third elastic wave. COPYRIGHT: (C)2011,JPO&INPIT
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