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引用本文：

王燕君,王峻,张茜.一种改进型声表面波滤波器在接收机中的应用[J].电讯技术，2007，47（4）：162 - 165. [点击复制]
.Application of an Improved Surface Acoustic Wave Filter(SAWF) in Receiver[J].，2007，47（4）：162 - 165. [点击复制]

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一种改进型声表面波滤波器在接收机中的应用

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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.

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

DOI：10.3969/j.issn.1001-893X.

投稿时间：2007-05-29修订日期：2007-08-03

基金项目:

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

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Abstract:

For dealing with the shortcoming of a surface acoustic wave filter(SAWF)with central frequency of 898.144MHz,an improved SAWF is proposed.The new SAWF adopts the mirror 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.

Key words: receiver,surface acoustic wave filter(SAWF),choice quality,temperature stability,amplitude-frequency characteristic