一种镜像频率干扰抑制接收机系统设计  

The Design of Receiver System with Image-Reject Function

作　　者：周惠忠[1] 

机构地区：[1]扬州工业职业技术学院,江苏扬州225127

出　　处：《电子技术（上海）》2016年第11期104-106,共3页Electronic Technology

基　　金：扬州工业职业技术学院科研课题资助项目

摘　　要：文章针对接收机系统中常见的镜像频率干扰问题,给出了一种接收机的设计方案。设计采用两次变频的超外差结构,通过对频点的合理设置,利用带通滤波器实现镜频干扰的抑制。同时通过对接收机各级部件增益和噪声系数的分配,实现系统指标符合设计要求。Aiming at the image frequence problem,this paper gives the design method for receiver system. The design uses the superheterodyne architecture with frequency conversion for two times.Through the reasonable setting of the frequency points, the receiver achieves the image-reject function by the band-pass filter.Also the distribution of gain and noise figure for the receiver is very important to achieve the design requirements.

关 键 词：镜像频率干扰 接收机 

分 类 号：TN97[电子电信—信号与信息处理]