校园FM调频立体声广播电台的设计毕业论文.doc -- 8 元

届本科毕业论文（设计）论文（设计）题目校园FM立体声广播电台的设计学生姓名所在院系所学专业应用电子技术教育导师姓名完成时间摘要本论文设计了一种校园FM调频立体声广播解决方案，文中首先阐述了FM调频工作原理，然后针对调频广播中存在的频偏、功率发射小和单声道广播等不足方面，系统的设计了校园型调频广播电台调频发射机电路、发射天线阻抗匹配与安装要求、校园内喇叭布局等方面的工程。关键词调频广播发射性能系统DesignofCampusFMBroadcastingSystemAbstractFMradiosystemoncampusasanelectrochemicalmeansofteachingandacademicfacilities,discussedthecampusbasedFMradiostationFMtransmitterdesignmachinedesign,impedancematchingtransmissionantennas,thetransmittingantennainstallationrequirements,thelayoutofthecampusandsospeakerworksDesignandimplementationoftherelevantissuesthroughengineeringtesttoverifythatthecampusbasedFMradiosystemengineeringdesignisreasonable.KeywordsFMbroadcastingsystemtransmissionpropertysystem目录1.引言...........................................................................................................................11.1项目背景..........................................................................................................11.1.1调频立体声及特点................................................................................11.1.2调频基本原理........................................................................................21.2研究意义..........................................................................................................21.2.1商用广播与校园广播的区别................................................................31.2.2建设校园fm立体声广播电台的意义.................................................32.电台的需求分析.......................................................................................................32.1功能需求..........................................................................................................32.1.1收听用户的主要功能要求....................................................................32.1.2电台管理的主要功能要求....................................................................32.2性能需求..........................................................................................................42.2.1尽量使用70～87MHz调频载波传输广播信号.................................42.2.2保证频率稳定，尽量避免频率漂移....................................................42.2.3尽量建议学校选用无线广播选用大功率的发射机............................43.校园背景简介及规划方案.......................................................................................43.1学院基本情况简介..........................................................................................53.2对系统的建设目标规划方案..........................................................................53.3系统设计原则..................................................................................................54.总体方案设计...........................................................................................................64.1调频发射机框图..............................................................................................64.2调频发射机电路图..........................................................................................65.发射机原理电路图分析...........................................................................................85.1BH1417锁相环调频立体声发射电路分析....................................................85.1.1BH1417的原理特性..............................................................................85.1.2音频输入端的限幅电路........................................................................95.1.3中级低通滤波器....................................................................................95.1.4末级FM发射电路................................................................................95.1.5频率控制表..........................................................................................105.2功率放大电路................................................................................................116.校园型调频广播发射天线与辅助设备基本要求.................................................126.1发射天线的基本特征....................................................................................126.2实现调频发射系统的阻抗匹配....................................................................126.3传输线与发射天线的阻抗匹配....................................................................136.4调频发射系统有关辅助设备........................................................................13