发明授权
US06911878B2 Acoustic wave branching filter having transmitting filter with optimal power handling
有权
具有发射滤波器的声波分波器具有最佳的功率处理能力
- 专利标题： Acoustic wave branching filter having transmitting filter with optimal power handling
- 专利标题（中）： 具有发射滤波器的声波分波器具有最佳的功率处理能力
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申请号： US10273887申请日： 2002-10-21
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公开(公告)号： US06911878B2公开(公告)日： 2005-06-28
- 发明人: Kenichi Anasako , Yoshiaki Fujita , Hisanori Ehara , Tomokazu Komazaki
- 申请人： Kenichi Anasako , Yoshiaki Fujita , Hisanori Ehara , Tomokazu Komazaki
- 申请人地址： JP Tokyo
- 专利权人： Oki Electric Industry Co., Ltd.
- 当前专利权人： Oki Electric Industry Co., Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Volentine Francos & Whitt PLLC
- 优先权： JP2001-328692 20011026
- 主分类号： H03H9/72
- IPC分类号： H03H9/72 ; B05D3/06 ; B05D7/24 ; C23C16/44 ; C23C16/455 ; C23C16/48 ; H03H9/64 ; H03M9/64 ; H03M9/72
摘要：
A surface acoustic wave filter includes an antenna terminal, a transmitting filter and a variable branching line both of which are coupled to the antenna terminal and a receiving filter coupled to the variable branching line. The transmitting filter has a first end series-arm SAW resonator, a second end series-arm SAW resonator, a middle series-arm SAW resonator coupled between the first and second end series-arm SAW resonators and parallel-arm SAW resonators. Each of the first and second end series-arm SAW resonator has a first resonance frequency. The middle series-arm SAW resonator has a second resonance frequency that is higher than the first resonance frequency.
公开/授权文献
- US20030117233A1 Surface acoustic wave resonator 公开/授权日：2003-06-26