发明授权
- 专利标题： Surface acoustic wave filter, and saw duplexer
- 专利标题（中）： 表面声波滤波器和锯式双工器
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申请号： US10587240申请日： 2005-02-02
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公开(公告)号： US07498898B2公开(公告)日： 2009-03-03
- 发明人: Hidekazu Nakanishi , Ryoichi Takayama , Yukio Iwasaki , Hiroyuki Nakamura
- 申请人： Hidekazu Nakanishi , Ryoichi Takayama , Yukio Iwasaki , Hiroyuki Nakamura
- 申请人地址： JP Osaka
- 专利权人： Panasonic Corporation
- 当前专利权人： Panasonic Corporation
- 当前专利权人地址： JP Osaka
- 代理机构： Wenderoth, Lind & Ponack, L.L.P.
- 优先权： JP2004-030327 20040206
- 国际申请： PCT/JP2005/001859 WO 20050202
- 国际公布： WO2005/076473 WO 20050818
- 主分类号： H03H9/72
- IPC分类号： H03H9/72 ; H03H9/64
摘要：
A plurality of surface acoustic wave resonators including a comb electrode and a grating reflector are coupled on a piezoelectric substrate. Dielectric film is formed on the surface of at least one surface acoustic wave resonator. No dielectric film is formed on the surface of at least one other surface acoustic wave resonator. Thus, a SAW filter where the insertion loss into a pass band is small, the steepness is sufficient, and the band is wide can be obtained.
公开/授权文献
- US20070152774A1 Surface acoustic wave filter, and saw duplexer 公开/授权日：2007-07-05
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