再颁专利
- 专利标题： Surface acoustic wave filter
- 专利标题（中）： 表面声波滤波器
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申请号： US09314943申请日： 1999-05-20
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公开(公告)号： USRE37790E1公开(公告)日： 2002-07-16
- 发明人: Yoshio Satoh , Osamu Ikata , Tsutomu Miyashita , Takashi Matsuda , Mitsuo Takamatsu
- 申请人： Yoshio Satoh , Osamu Ikata , Tsutomu Miyashita , Takashi Matsuda , Mitsuo Takamatsu
- 优先权： JP3-281694 19911028; JP4-032270 19920219
- 主分类号： H03H900
- IPC分类号： H03H900
摘要：
A SAW filter includes a first SAW resonator having a pair of terminals and a predetermined resonance frequency (frp), the first SAW resonator being provided in a parallel arm of the SAW filter. A second SAW resonator has a pair of terminals and a predetermined resonance frequency (frs) approximately equal to a predetermined antiresonance frequency of the first SAW resonator (fap). The second SAW resonator is provided in a series arm of the SAW filter. An inductance element is connected in series to the first SAW resonator.
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