摘要
对某型接收机中频噪底升高故障进行了分析处理,分析结果表明射频模块腔体内存在个体差异,导致本振放大器在脉冲工作条件下产生自激,通过对放大器自激机理的分析给出了相应的预防措施,在射频小盒侧壁中粘贴吸波材料,可以有效消除自激。论文对今后腔体自激问题的处理分析具有参考价值。
The fault of higher level of IF-Noise was successfully handled for a receiver.The result shows that individual differ‐ences exist within the RF module cavity.It causes the self-excited oscillation of the local oscillator amplifier in pulsed mode.Pre‐ventive measures are given after analysis of the mechanism.Attach wave-absorbing materials to the sidewalls of the RF box can effectively eliminate self-excited oscillation.This article has value for the analysis and treatment of cavity self-excited oscillation in the future.
作者
余小辉
麻泽龙
Yu Xiaohui;Ma Zelong(The 13th Research Institute of China Electronics Technology Group Corporation,Shijiazhuang 050000,China)
出处
《电子技术应用》
2024年第11期54-58,共5页
Application of Electronic Technique
关键词
放大器
自激机理
吸波材料
预防措施
amplifier
mechanism of self-excited oscillation
wave-absorbing materials
preventive measures
