射频接收机中自动增益控制电路建模与设计  

Modeling and Design of Automatic Gain Control Circuit for RF Receiver

作　　者：王帅[1] 张杰[1] 张彦峰[1] WANG Shuai;ZHANG Jie;ZHANG Yanfeng(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所

出　　处：《无线电通信技术》2019年第4期419-424,共6页Radio Communications Technology

基　　金：十三五装备预研共用技术领域基金项目(61403110201)

摘　　要：提出了一种射频接收机中自动增益控制(Automatic Gain Control,AGC)电路的建模方法和设计方法。该建模方法对射频接收机中自动增益控制电路进行了建模分析和理论推导,得到3 种常见电路拓扑的时间常数公式。通过电子设计软件对该模型进行仿真验证,得到的时域分析结果与模型计算相吻合。对采用模型参数的接收机电路进行了制作和测试,与模型计算和仿真结果匹配良好。该方法解决了射频接收机中自动增益控制电路不同时间常数的设计难题,对精细自动增益控制电路设计提供理论指导。A modeling method and design method of automatic gain control circuit for RF receiver is presented.The modeling method analyzes and theoretically deduces the receiver Automatic Gain Control(AGC) circuit of UAV TT&C,and obtains the time constant formulas of three common circuit topologies.The model is simulated and verified by electronic design software,and the results of time domain analysis are consistent with the model calculation.The receiver circuit with model parameters is fabricated and tested,which is well matched with the model calculation and simulation results.The method solves the design problem of the receiver automatic gain control circuit with different time constants in the UAV TT&C system and provides theoretical guidance for the design of fine automatic gain control circuit.

关 键 词：自动增益控制 时间常数 射频接收机 模型 

分 类 号：TN850.3[电子电信—信息与通信工程]