6.2~9.4GHz超宽带接收机射频前端研究与设计的开题报告摘要：超宽带技术作为一种新兴的无线通信技术，具有带宽宽、抗多径衰落、干扰抑制等优势，已被广泛应用于雷达探测、通信和定位等领域。本文主要研究6.2~9.4GHz超宽带接收机射频前端的设计与实现。首先介绍超宽带技术的基础知识和应用；然后根据超宽带接收机的需求，设计了一款基于微带线的射频前端电路，采用双电平多晶体振荡器进行信号的本振和频率合成，并采用变增益放大器进行信号放大；最后，利用ADS软件进行电路模拟和优化，得到了一款性能稳定、抗干扰能力强的超宽带接收机射频前端电路。关键词：超宽带；微带线；双电平多晶体振荡器；变增益放大器；射频前端；ADSAbstract:Asanewemergingwirelesscommunicationtechnology,ultra-wideband(UWB)technologyhasadvantagesofwidebandwidth,anti-multipathfading,andinterferencesuppression,andhasbeenwidelyusedinfieldssuchasradardetection,communication,andpositioning.ThispapermainlystudiesthedesignandimplementationoftheRFfrontendofthe6.2~9.4GHzUWBreceiver.Firstly,thepaperintroducesthebasicknowledgeandapplicationofUWBtechnology.Then,accordingtotherequirementsofUWBreceiver,amicrostrip-basedRFfrontendcircuitisdesigned,whichusesadual-levelcrystaloscillatorforlocaloscillationandfrequencysynthesis,andusesavariablegainamplifierforsignalamplification.Finally,usingtheADSsoftwareforcircuitsimulationandoptimization,aUWBreceiverRFfrontendcircuitwithstableperformanceandstronganti-interferenceabilityisobtained.Keywords:Ultra-Wideband,Microstripline,Dual-levelcrystaloscillator,Variablegainamplifier,RFfrontend,ADS.