| 摘要 |
A surface acoustic wave device includes one-terminal-pair SAW series resonators (11a-11c) and one-terminal-pair SAW parallel resonators (12a-12d) arranged in a ladder configuration. Among the series resonators, the resonant frequencies of, for example, two series resonators (11a,11b) forming the pass band are lower than the anti-resonant frequency of the parallel resonators (12a-12d) forming the pass band. A capacitive area of one of the series resonators (11c) is disposed in an inductive area formed by the parallel resonators (12a-12d) forming the pass band and the other series resonators (11a,11b) forming the pass band. <IMAGE> |
