摘要
基于分布间隙纵向耦合五换能器结构,加入谐振器单元,采用41°Y-X LiNbO_3基片材料,通过优化设计,研制出中心频率232 MHz,3dB带宽23.2 MHz的声表面波滤波器。该产品的插入损耗为-1.9dB,相对带宽达到10%,矩形系数2.2,阻带抑制大于50dB,产品综合性能指标优异,有很好的实用性。
Based on the distributed gap and longitudinally-coupled five-transducer structure, adding into the resonator element and optimizing the design, a SAW filter with center frequency of 232 MHz and 3 dB bandwidth of 23.2 MHz has been developed by using 41° Y-X LiNbO 3 piezoelectric material as the substrate. The product has the features of insertion loss of -1.9 dB, relative bandwidth of 10%, and shape factor of about 2.2 and stop-band rejection of 50 dB. The comprehensive performance specification of the product is excellent and has good practicability.
作者
毛世平
曾庆高
陈彦光
蒋世义
彭昱皓
MAO Shiping;ZENG Qinggao;CHEN Yanguang;JIANG Shiyi;PENG Yuhao(The 26th Institute of China Electronics Technology Group Corporation,Chongqing 400060,China;School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China)
出处
《压电与声光》
CAS
CSCD
北大核心
2018年第3期337-339,共3页
Piezoelectrics & Acoustooptics
基金
国家科技部重点研发计划项目资助
关键词
大带宽
声表面波滤波器
五换能器
谐振器
wide bandwidth
surface acoustic wave filter
five-IDT
resonator
