| 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. |
| Received:May 29, 2007Revised:August 03, 2007 |
| 基金项目: |
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| 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 |
