接收机的射频前端设计

RF Front-End Design in Receiver

本文首先简要说明了射频前端在接收机中的重要性，之后详述了射频前端可能采用的几种结构，并分 析了影响其性能的各种因素。

A receiver's front-end dominates its dynamic performance far more than the IF or other section of the receiver. The matters of sensitivity and selectivity are dominated by the IF performance characteristics,but the dynamic performance is influenced by the front-end of the receiver .Areas such as dynamic range,intermodulation distortion,-1dB compression point and third-order intercept point are a function of how well the front-end of the receiver performs.Several different architectures are used in receiver front-end circuits,including simple RF front-end architecture and more complex front-end architecture.