| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact low pass filter having low loss and steep attenuating characteristics. SOLUTION: This low pass filter is provided with a first filter 1, a second filter 2, a third filter 3 and a fourth filter 4. The first filter 1 is configured of a two-terminal pair SAW resonator 11. The second filter 2 is configured of a one-terminal pair SAW resonator 21 and an inductor 22. The third filter 3 is configured of a capacitor 33 and a one-terminal pair SAW resonator 31 and an inductor 32. The fourth filter 4 is configured of a two-terminal pair SAW resonator 41. COPYRIGHT: (C)2008,JPO&INPIT
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