通信电子线路设计

武汉理工大学课程设计《通信电子线路设计》1目录摘要............................................................................................................................................1Abstract......................................................................................................................................21高频小信号调谐放大器的电路设计与仿真....................................11.1主要技术指标.......................................................11.2给定条件...........................................................11.3设计过程...........................................................11.3.1选定电路形式.................................................11.3.2设置静态工作点...............................................21.3.3谐振回路参数计算.............................................31.4单调谐高频小信号放大器电路仿真实验.................................41.4.1仿真电路和波形...............................................41.4.2性能测试.....................................................51.5实物与调试.........................................................72LC三点式反馈振荡器与晶体振荡器设计与制作...............................72.1电容三点式振荡器原理工作原理分析...................................82.1.1串联型改进电容三端式振荡器(克拉泼电路)......................102.1.2并联型改进电容三端式振荡器(西勒电路)........................102.2主要设计技术性能指标..............................................122.3基本设计条件......................................................122.4电路结构..........................................................122.5静态工作电流的确定................................................132.6确定主振回路元器件................................................132.7仿真与性能测试....................................................142.7.1仿真电路和波形..............................................142.7.2性能测试....................................................152.8实物与调试........................................................163.高频谐振功率放大器电路设计与制作.......................................173.1设计要求..........................................................173.1.1确定功放的工作状态..........................................173.1.2基极偏置电路计算............................................183.1.3计算谐振回路与耦合线圈的参数................................183.1.4电源去耦滤波元件选择........................................193.2高频功放外部特性..................................................203.3仿真与性能测试....................................................203.3.1仿真电路和波形..............................................203.3.2性能测试....................................................213.4实物与调试........................................................224.小结体会...............................................................235.参考文献...............................................................24武汉理工大学课程设计《通信电子线路设计》1摘要本文对高频调谐小信号放大器、LC振荡器、高频功率放大器电路设计原理作了简要分析，同时，研究了各个电路的参数设置方法，并利用其它相关电路为辅助工具来调试放大电路，解决了放大电路中出现的问题。高频小信号谐振放大电路是将高频小信号或接收机中经变频后的中频信号进行放大，已达到夏季所需的激励电压幅度。LC振荡器的作用是产生标准的信号源。高频功放的作用是以搞的效率输出最大的高频功率。三部分都是通信系统中无线电收发机所用到的技术，所以在现实生活中具有相当广泛的应用。高频小信号放大器一般用于放大微弱的高频信号,此类放大器应具备如下基本特性:只允许所需的信号通过,即应具有较高的选择性；放大器的增益要足够大；放大器工作状态应稳定且产生的噪声要小；放大器应具有一定的通频带宽度。高频谐振功率放大电路，是无线电发射机的重要组成部分,它的主要功用是实现对高频已调波信号的功率放大,然后经天线将其转化为电磁波辐射到空间,以实现用无线信道的方式完成信息的远距离传送。对高频功率放大器的基本要求是,尽可能输出大功率、高效率，为兼顾两者，通常选丙类且要求在临界工作状态，其电流流通角c在600—900范围。关键词：高频小信号放大器、LC振荡器、高频谐振功率放大器武汉理工大学课程设计《通信电子线路设计》2AbstractInthispaper,highfrequencytuningsmallsignalamplifiers,LCoscillators,rfpoweramplifiercircuitdesignprincipleisbrieflyanalyzedinthispaper,atthesametime,theresearchoneachofthecircuitparameterssettingmethod,andUSESotherrelatedcircuitastheauxiliarytooltodebugamplifiercircuit,solvetheproblemsarisingfromtheamplifiercircuit.Smallsignalresonantfrequencyamplifiercircuitissmallsignalorreceiveroxpatiationhighfrequencyinverterfrequencysignalafteramplification,hasreachedtheincentivevoltageamplitudesummerrequired.LCoscillatorsroleistoproducestandardsource.Theroleofhighfrequencyamplifierismaketheefficiencyofthebiggestrfpoweroutput.Threepartsarecommunicationsystemtransceiverusedtechnology,soinreallifehasquitewidely.High-frequencysmallsignalamplifiergenerallyusedtoamplifyglimmerofhighfrequencysignal,suchamplifiershouldhavebasiccharacteristicsasfollows:onlyallowrequiredbythesignal,namelymusthavehighselectivity,Theamplifier'sgainenoughbig,Amplifierworkingconditionshouldbestableandofthenoisetosmall;Amplifiershouldhavecertainpassbandwidth.High-frequencyharmonicpoweramplifiercircuit,isanimportantpartofthetransmitter,itsmainfunctionistorealizethehighfrequencywavesignalalreadyadjustablepoweramplifierandthenbyantennaistransformedintoelectromagneticradiationtothespace,inordertorealizethewaytofinishwitharadiochannelinformationofteleportation.Thehighfrequencyamplifierarebasicrequirements,asfaraspossibleoutputpower,highefficiency,bothforconsideration,usuallychoosecclassandrequirethecriticalworkingcondition,itscurrentflowAnglein600-900range.Keywords:high-frequencysmallsignalamplifiers,LCoscillators,high-frequencyharmonicamplifiers武汉理工大学课程设计《通信电子线路设计》11高频小信号调谐放大器的电路设计与仿真1.1主要技术指标谐振频率：of＝10.7MHz,谐振电压放大倍数：dBAVO20，通频带：MHzBw17.0，矩形系数：101.0rK。要求：放大器电路工作稳定，采用自耦变压器谐振输出回路。1.2给定条件回路电感L=4μH,0100Q，11p，20.3p，晶体管用9018，β=50。查手册可知，9018在VVce10、mAIE2时，sgieu2860，u