发明授权
- 专利标题： Surface acoustic wave filter and filter device
- 专利标题（中）： 表面声波滤波器和滤波器
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申请号： US10685704申请日： 2003-10-16
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公开(公告)号： US06967546B2公开(公告)日： 2005-11-22
- 发明人: Tadashi Nakatani , Tsutomu Miyashita , Yoshio Satoh
- 申请人： Tadashi Nakatani , Tsutomu Miyashita , Yoshio Satoh
- 申请人地址： JP Yokohama JP Kawasaki
- 专利权人： Fujitsu Media Devices Limited,Fujitsu Limited
- 当前专利权人： Fujitsu Media Devices Limited,Fujitsu Limited
- 当前专利权人地址： JP Yokohama JP Kawasaki
- 代理机构： Arent Fox PLLC
- 优先权： JP2002-306041 20021021
- 主分类号： H03H9/02
- IPC分类号： H03H9/02 ; H03H9/145 ; H03H9/25 ; H03H9/64
摘要：
A surface acoustic wave filter includes series-arm resonators and parallel-arm resonators that are connected in a ladder-like fashion. This surface acoustic wave filter satisfies conditions expressed as: 1×106≦4π2f02R2CopCos≦3.1×106 where Cop is the electrostatic capacitance of the parallel-arm resonators, Cos is the electrostatic capacitance of the series-arm resonators, f0 is the center frequency, and R is the nominal impedance.
公开/授权文献
- US20040124953A1 Surface acoustic wave filter and filter device 公开/授权日：2004-07-01
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