发明名称 |
ELASTIC WAVE FILTER DEVICE AND ANTENNA DUPLEXER USING SAME |
摘要 |
An elastic wave filter device includes a longitudinally coupled resonator-type elastic wave filter formed on a piezoelectric substrate; and a ladder-type elastic wave filter connected to the resonator-type elastic wave filter. The resonator-type filter includes an input IDT and an output IDT. The ladder-type filter includes a series arm resonator and a parallel arm resonator. A first ground electrode connected to the parallel arm resonator is electrically separated from a second ground electrode connected to at least one of the input IDT and the output IDT. |
申请公布号 |
US2012313724(A1) |
申请公布日期 |
2012.12.13 |
申请号 |
US201013509641 |
申请日期 |
2010.11.10 |
申请人 |
TSURUNARI TETSUYA;FUJIWARA JOJI;NAKAMURA HIROYUKI;PANASONIC CORPORATION |
发明人 |
TSURUNARI TETSUYA;FUJIWARA JOJI;NAKAMURA HIROYUKI |
分类号 |
H03H9/72;H03H9/64 |
主分类号 |
H03H9/72 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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