超外差接收机通信干扰问题的分析  

Analysis of the Communication Interferenceof the Superbetrodyne Receiver

作　　者：吴兴源[1] 

机构地区：[1]西南师范大学物理系

出　　处：《电讯技术》1996年第3期11-21,共11页Telecommunication Engineering

摘　　要：本文阐述了新式接收机在强射频干扰中接收微弱信号时，超外差通信原理内部的物理现象及其一般规律的数学描述。对接收机前端电路中的互调与交调、倒易混频、阻塞干扰的产生机理及其相互间的联系进行了讨论，并提出了各自相应的抑制方法。文末介绍了接收机的动态性能。This article summarizes the interior physical phenomenon of the superhetrodyne communication principle when receiving weak signals in intersive RF interference,and discribes mathematically its general law.The article also discusses the formation principle and interrelationship of the interference of intermodulation,cross modulation.inverting and mixing and blocking in the front circuit of the receiver,and puts forward the corresponding improving method.The end of the article briefly introduces the dynamic function of the receiver.

关 键 词：超外差接收机 抗干扰 混频器 非线性变频 

分 类 号：TN851.4[电子电信—信息与通信工程]