| 摘要 |
<p>A surface acoustic wave device includes a first surface acoustic wave filter (1) connected between an input terminal (3) and an output terminal (4), a second surface acoustic wave filter (2) having a different center frequency from that of the first surface acoustic wave filter (1), and which is connected between the input terminal (3) and the output terminal (4) and in parallel with the first surface acoustic wave filter, and at least one one-port surface acoustic wave resonator (5,6,9) connected in series with the first or second surface acoustic wave filter (1,2), on at least one side between the input terminal (3) and at least one of the first and second surface acoustic wave filters (1,2), or between the output terminal (4) and at least one of the first and second surface acoustic wave filters (1,2). The anti-resonance frequency of the one one-port surface acoustic wave resonator (5,6,9) is positioned on the side of higher frequencies than those of the pass band of the surface acoustic wave filter disposed on the side where the one-port surface acoustic wave resonator is connected in series.
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