基于Multisim的调频通信系统仿真

LANZHOUUNIVERSITYOFTECHNOLOGY题目基于Multisim的调频通信系统仿真学生姓名姬晓义学号09250113专业班级通信工程一班指导教师何继爱王璐学院计算机与通信学院答辩日期2013年6月13日兰州理工大学毕业设计基于Multisim的调频通信系统仿真SimulationoffrequencymodulationcommunicationsystembasedonMultisim姬晓义（JiXiaoyi）09250113兰州理工大学毕业设计I摘要调频通信系统设计中系统的介绍了发射系统和接收系统设计方案，特别是发射系统和接收系统的基本功能，频率选择，功放等，最后定性、定量分析这些电路性能。这些电路包括了发射系统和接收系统中的变容二极管直接调频电路、射极跟随器、放大器、高频小信号放大器、本振电路、混频电路、功放电路、鉴频器、低频放大器等。利用Multisim仿真软件将各个电路进行仿真，最后，把各个电路进行级联，并进行修改，修改之后，逐级进行调试仿真，得出最终仿真结果图。设计的基本目的是：通过理论和实践学习，使我们了解各个电路工作处于高频时的工作原理，特性参数及微变等效电路等，掌握高频单元电路的线路组成、基本工作原理、分析方法、技术要求及典型集成电路的实际应用，并且具备一定的理论水平和足够的实践技能，为进一步学习通讯技术的专业知识和职业技能打下基础。关键词：调频；发射系统；接收系统；Multisim仿真；电路分析兰州理工大学毕业设计IIAbstractDesignofFMcommunicationsystemintroducedthesystemofemissionandreceivingsystemdesignscheme,Especiallythebasicfunctionofemissionandreceivingsystem,frequencyselection,Poweramplifier,Thecircuitperformanceanalysisandqualitative,quantitative.ThecircuitincludesaemissionsystemandreceivingsysteminVaractordiodedirectFM,emitterfollower,amplifier,Highfrequencysmallsignalamplifier,Theoscillatorcircuit,mixercircuit,Thepoweramplifiercircuit,frequencydetectorandlow-frequencyamplifier.EachcircuitissimulatedwithMultisimsimulationsoftware,Finally,allthecircuitsarecascaded,Andmodify,Afterthemodification,Stepdebuggingsimulation,Thefinalsimulationresultsfigure.Thebasicdesignofthisfinishschoolare:Throughthecombinationoftheoryandpractice,soweknowwheneachcircuitathighworkingprinciple,characteristicsandmicro-dependentequivalentcircuitparameters,frequencycontrolcircuitofthelineunitcomposition,thebasicworkingprinciplemethods,technicalrequirements,andsometypicalIC,andhaveacertaintheoreticallevelandenoughofthepracticalskills,communicationtechnologiesforthefurtherstudyofexpertiseandprofessionalskillsbasis.Keywords:frequencymodulation;emissionsystem;receivingsystem;multisimsmulation;circuitanalysi兰州理工大学毕业设计III目录第1章绪论................................................................................................................................11.1研究背景.......................................................................................................................11.2研究现状.......................................................................................................................11.3设计内容.......................................................................................................................2第2章基本原理........................................................................................................................42.1引言...............................................................................................................................42.2开发平台简介...............................................................................................................52.3基本理论.......................................................................................................................6第3章调频发射系统电路仿真..............................................................................................143.1振荡级.........................................................................................................................143.2变容二极管调频.........................................................................................................153.3缓冲级.........................................................................................................................183.4功率输出级.................................................................................................................193.5调频发射系统整机电路图级联.................................................................................20第4章调频接收系统电路仿真..............................................................................................224.1高频放大电路.............................................................................................................224.2本振电路.....................................................................................................................234.3混频器.........................................................................................................................244.4中频放大电路.............................................................................................................254.5鉴频电路.....................................................................................................................264.6低频放大电路.............................................................................................................274.7调频接收系统整机电路图级联.................................................................................28总结............................................................................................................................................31参考文献....................................................................................................................................32附录............................................................................................................................................331发射整机电路图...........................................