机载超短波接收机射频前端系统级设计与仿真
电子技术应用
张宇晖
中国西南电子技术研究所，四川 成都61003
摘要： 针对某型号超短波接收机研制需求，使用ADS（Advanced Design System）软件对该超短波接收机射频前端进行设计与仿真。通过分析接收机的性能需求，结合接收机主要工作原理和技术指标选取二次变频超外差接收机结构做为实现方案，根据设计方案在ADS中建立了射频前端的系统级仿真模型，并对射频前端的噪声系数、灵敏度、增益和互调失真等多个关键指标进行了设计分析和仿真计算，结果表明该射频前端各项指标满足设计要求。
中图分类号：TN492 文献标志码：A DOI: 10.16157/j.issn.0258-7998.233885
中文引用格式： 张宇晖. 机载超短波接收机射频前端系统级设计与仿真[J]. 电子技术应用，2024，50(1)：83-86.
英文引用格式： Zhang Yuhui. The system-level design and simulation of RF front-end in airborn ultra-short wave receiver[J]. Application of Electronic Technique，2024，50(1)：83-86.
The system-level design and simulation of RF front-end in airborn ultra-short wave receiver
Zhang Yuhui
Southwest China Institute of Electronic Technology， Chengdu 610036， China
Abstract： In this paper, according to the needs of airborn ultra-short wave receiver, the system-level design and simulation of RF front-end circuit is carried out by using Advanced Design System（ADS）. By analyzing the performance requirements of ultra-short wave receiver, combined with the main working principle and technical indicators of the receiver, the structure of the dual-conversion superheterodyne receiver is selected as the implementation scheme. The system level simulation model of RF front-end of receiver is established in ADS. The key indicators of RF front-end of the design such as noise figure, sensitivity, gain and intermodulation distortion are designed, analyzed and simulated by ADS. The simulation results show that the RF front-end meets the requirements of the design.
Key words : UHF receiver；RF front-end；ADS
引言
机载超短波接收机在军事通信系统及民用通信系统都有着广泛应用，近年来随着高性能集成芯片的不断发展，机载超短波接收机朝着宽带、高灵敏度、高线性度以及高度集成化的方向发展。射频前端处于整个接收机最前端，对整个接收机的性能起着至关重要的作用[1]，因此对超短波接收机射频前端的性能需求也在不断提升。ADS（Advanced Design System）软件是美国Agilent公司研发的通信系统仿真软件，可用于射频电路级和系统级的仿真设计。本文根据某型号超短波接收机技术指标要求对射频前端进行系统级设计，并利用ADS对射频前端进行系统级建模与仿真。
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作者信息：
张宇晖
（中国西南电子技术研究所，四川 成都61003）
