| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a noise filter and a duplexer including a series resonator comprising capacitors and an inductor which have an increased inductance value.SOLUTION: A noise filter 10a includes a first inductor L1, a first capacitor C1 connected in series with the first inductor L1, and a second capacitor C2 connected in parallel with the first inductor L1. A first resonance frequency of a series resonator 13 comprising a series connection of a parallel resonator 12 comprising the first inductor L1 and the second capacitor C2 and of the first capacitor C1 is lower than a second resonance frequency of the parallel resonator 12.</p> |
