Analysis of Image Frequency Interference in Altimeter Front-End Receiver
A major problem of the superheterodyne receivers is their response to the undesired frequencies,such as harmonic,image frequency signal.In this paper,special attention is paid to the image frequency interference.In order to analysis the effect of the image frequency signal to the superheterodyne,a behavioural model of a superheterodyne receiver of altimeter is presented and its electromagnetic compatibility is analyzed from the aspects of spectrum and power under the condition of image frequency interference.According to the simulation results,the methods of EMC reinforcement are given.The performance of the improved receiver is simulated and analyzed under the same condition.And the results based on the reinforcement system further verify the effectiveness of the method and the receiver achieves a higher image rejection ration.
image interference image rejection ratio (IRR) electromagnetic compatibility (EMC)
Xiaofeng Yu Zhaowen Yan Shuguo Xie Yan Liu
School of Electronics and Information Engineering,BUAAEMC Lab,Beijing,100191,China School of Electronics and Information Engineering,BUAA EMC Lab,Beijing,100191,China
国际会议
昆明
英文
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）