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一种低损耗高抑制的声表面波滤波器

Yanguang CHEN,Jiahe DONG,Qinghua CHEN,Shiyi JIANG,Huazhi CHEN,Hualin LI,Shangquan CHEN,Chuan LU,Xuemei ZHAO

Piezoelectrics & Acoustooptics（2020）

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Abstract
该文采用周期调制及双通道设计的方法实现了一种低损耗高抑制声表面波滤波器的研制.该滤波器以64°Y-X LiNbO3为基片材料,其中心频率约475 MHz,插入损耗小于2 dB,阻带抑制优于60 dB及1 dB相对带宽约5％.研制的滤波器具有低插损及高阻带抑制的特性,结果表明该设计方法具有很好的实用性.
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