L波段超外差接收机的设计与实现  

Design of L-band Superheterodyne Receiver

作　　者：廖奎旭[1] 杨自强[1] 杨涛[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都611731

出　　处：《电子元器件应用》2012年第10期58-61,共4页Electronic Component & Device Applications

基　　金：中央高校基本科研业务费资助(103.1.2E022050205)

摘　　要：介绍了一种L波段超外差接收机的设计与实现方法。该超外差接收机有四个通道,每个通道将天线接收到的微弱射频信号进行下变频,得到中频信号。通过增加Pi型衰减网络和相移网络使各个通道的幅度和相位一致。经过测量所做实物表明:有很好的幅相一致性;能够在-64dBm的干扰下接收-120dBm信号;能够接收两种卫星系统的信号。Introduced a method to design L-band superheterodyne receiver. It has four channels. Each channel received weak RF signal from the antenna,and down-conversion,finally get an IF signal. Each channel＇s coherence of amplitude and phase is improved by adding a Pi-type network,which is an attenuation network and phase-shift network. The measurement result is that： the coherence of amplitude and phase is excellent;Receiving-120dBm to-64dBm interference signal;be able to receive the signal of the two satellite systems.

关 键 词：接收机 L波段 幅相一致性 噪声系数 

分 类 号：TN851.4[电子电信—信息与通信工程]