宽动态范围接收机射频前端的设计与仿真

Design and Simulation of RF Front-end of Wide Dynamic Range Receiver

在接收机系统中,中频信号的纯净度及电平平稳性对后续数字处理有很大影响,因此设计一个性能优越的前端对提高接收机整机性能有着非常重要的作用。该文旨在提出一种应用在宽动态范围接收机前端的设计方案,以达到宽动态范围、高灵敏度和中频稳定输出。结合设计指标选用合适的芯片,并利用Advanced Design System软件对整个系统进行仿真。仿真结果验证了各项指标均达到预期所设要求。

In the receiver system,the purity and stability of IF signals has a great influence on the subsequent digital processing. Therefore,a finer RF front-end plays an important role in improving a receiver＇s performance. This paper aims to present a design for front-end applying in wide dynamic range receivers to achieve wide dynamic range,high sensitivity and IF stable output. Chooses appropriate chips according to the design indexes and uses ADS software to simulate. The results show that the indicators have reached the expected requirements.