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.
出处
《电讯技术》
2007年第4期162-165,共4页
Telecommunication Engineering
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
receiver
surface acoustic wave filter (SAWF) - frequency characteristic
choice quality
temperature stability
amplitude
作者简介
王燕君(1976-),女,山西人,助理工程师,主要从事射频通信研究,(电话)028—87555755;
王峻(1971-),男,山东济阳人,少校军衔;
张茜(1982-),女,四川人,主要从事射频通信研究,(电话)028—87555139。