公开(公告)号：US20100097161A1

公开(公告)日：2010-04-22

申请号：US12444617

申请日：2007-11-12

申请人： Hiroyuki Nakamura ,  Ken Matsunami ,  Tetsuya Tsurunari ,  Hidekazu Nakanishii

发明人： Hiroyuki Nakamura ,  Ken Matsunami ,  Tetsuya Tsurunari ,  Hidekazu Nakanishii

IPC分类号： H03H9/72 ,  H03H9/64 ,  H01L41/22 ,  B05D5/12

CPC分类号： H03H9/6496 ,  H03H9/725

摘要： A surface acoustic wave filter comprised of a plurality of surface acoustic wave resonators having different resonance frequencies, the filter comprising a substrate made of a lithium niobate, comb electrodes (1201 and 1202) formed on the substrate, and a thin dielectric film covering the comb electrodes (1201 and 1202), wherein the surface acoustic wave resonator having a lower resonance frequency is formed to have a metallization ratio larger than a metallization ratio of the surface acoustic wave resonator having a higher resonance frequency, thereby providing the surface acoustic wave filter and an antenna duplexer featuring superior characteristics with insignificant ripples while suppressing spurious responses of the surface acoustic wave resonators.

摘要翻译： 一种表面声波滤波器，由具有不同谐振频率的多个声表面波谐振器组成，该滤波器包括由铌酸锂构成的基板，形成在基板上的梳电极（1201和1202）和覆盖该梳子的薄电介质膜 电极（1201和1202），其中具有较低谐振频率的表面声波谐振器形成为具有大于具有较高谐振频率的表面声波谐振器的金属化率的金属化率，从而提供表面声波滤波器和 天线双工器在抑制声表面波谐振器的杂散响应的同时，具有优异的特性和不起眼的波纹。