| 摘要 |
An elastic wave device 1 is provided with: a plurality of series resonators S1 to S4 and a plurality of parallel resonators P1 to P4 which comprise elastic wave elements, the plurality of series resonators S1 to S4 and the plurality of parallel resonators P1 to P4 respectively constituting ladder-connected filters; a first capacitance portion C1 connected in parallel with at least one of the plurality of series resonators S1 to S4; and a second capacitance portion C2 connected in series with at least one of the plurality of parallel resonators P1 to P4. The elastic wave device 1 can improve attenuation characteristics outside a pass band while suppressing losses in the pass band. |
