一种改进型声表面波滤波器在接收机中的应用  

Application of an Improved Surface Acoustic Wave Filter(SAWF) in Receiver

作　　者：王燕君[1] 王峻 张茜[1] 

机构地区：[1]中国西南电子技术研究所,成都610036 [2]南京军区空军装备部航材处,南京210018

出　　处：《电讯技术》2007年第4期162-165,共4页Telecommunication Engineering

摘　　要：针对应用于接收机中中心频率为898.144MHz的声表面波滤波器的缺点,提出了一种改进型的滤波器。改进型的声表面波滤波器采用镜像阻抗连接低插损结构,大大改善了幅频特性,提高了选择性和温度稳定性。将其应用到接收机中,经试验验证效果良好。For dealing with the shortcoming of a surface acoustic wave filter（SAWF） of 898. 144MHz , an improved SAWF is proposed. The new SAWF adopts the mirror with central frequency impedance connection structure with low insertion loss, which can improve the amplitude -frequency characteristic greatly, as well as the choice quality and the temperature stability. Finally, the new SAWF is applied to receiver and experiments prove its excellent performance.

关 键 词：接收机 声表面波滤波器 选择性 温度稳定性 幅频特性 

分 类 号：TN713[电子电信—电路与系统]