射频接收前端的ADS设计与仿真

射频接收前端作为射频信号分析仪的重要组成部分，对射频（RF）信号的测量起着决定性的作用。使用ADS软件，构建了一种860~960 MHz的射频信号分析仪射频接收前端系统仿真平台。在设计中采用了前置低噪声放大器（LNA）来降低系统噪声，利用自动增益控制（AGC）来实现接收前端的大动态范围。对设计的射频接收前端的增益、噪声系数、灵敏度、动态范围等指标进行了分析计算，并通过仿真工具进行了仿真验证。仿真结果表明，所设计的射频接收前端各项指标均达到了设计要求。

ADS design and simulation of radio receiver front-end

As an important part of the Radio Front（RF） signal analyzer, the RF receiver front-end plays a decisive role in the measurement of the RF signal. This paper builds one kind of 860~960 MHz RF receiver front-end system simulation platform of RF signal analyzer using the Advanced Design System（ADS） software. The pre-LNA is used to reduce system noise, and AGC is used to achieve a large dynamic range of the RF receiver front-end in the design. The gain, noise figure, sensitivity, dynamic range and other indicators of RF front-end of the design are calculated, and simulated by the software simulation tools. The simulations show that the RF front-end designed in the paper meets the requirements of the design.