高频电子线路课程设计--调幅发射机及超外差式接收机设计

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1、高频电子线路设计报告高频电子线路课程设计报告课题：调幅发射机及超外差式接收机设计学院：信息科学技术学院专业：通信工程姓名：组员：指导老师：二零一零年十一月31高频电子线路设计报告目录摘要···················································3一、设计指标··········································31、发射部分··········································32、接收部分················

2、··························3二、调幅发射机1、设计要求··········································42、设计目的··········································43、设计实现31高频电子线路设计报告··········································43.1、系统概述·····································43.2、单元电路设计与分析·············

3、··············53.2.1、小信号调制模块····························53.2.2、高频载波模块······························73.2.3集电极调幅模块·····························94、调幅发射机总图····································11三、差外差式接收机1、设计要求········································122、系统框31高频电子线路设计报告图·

4、········································123、各模块分析设计和仿真·····························133.1、高频小信号放大器模块·························133.2、混频器模块···································163.3、本地振荡器模块·······························183.4、中频放大器模块·······························203.5、包

5、络检波器模块·······························224、总电路原理图·····································2431高频电子线路设计报告四、元器件清单1、发射机清单········································242、接收机清单········································25五、问题讨论···········································27六、心得体会·····

6、······································27七、参考文献···········································2831高频电子线路设计报告摘要随着无线电的发展，如今的发射接收装置都在不断的更新换代。由当初的分离元件到如今的集成模块，变化是如此明显，成就也是显著的，并且现在的无线电应用范围几乎覆盖了我们身边的所有事物。为了从根本上了解无线电的原理，我们从基层了解，并亲自动手仿真，了解发射与接收装置。因此，有了本次课程设计。我以调幅发射装置发射AM波，再以超外差

7、式接收机接收信号，并且解调出来。借助Multisum仿真软件进行仿真。发射装置我采用了三个模块：RC乔氏电桥振荡电路产生调制信号；克拉波电路产生载频波；整合电路实现电路调幅波。接收部分我采用了五个模块：高频小信号放大；混频器；本地振荡；.中频放大；检波。最后检波出与发射装置相同的调制信号。【关键词】MultisumAM波调制解调发射装置超外差式接收机一、设计指标1、发射部分1）、工作频率范围：AM调幅发射机的工作频率在高频范围内（3~30MHz）2）、发射功率：一般指发射机送到天线上的功率。只有当天线的长度与发射频率的波长可

8、比拟时，方能形成较强的辐射。将载波发射出去。3）、调幅系数：调幅系数是调制信号控制载波电压振幅变化的系数，的取值范围为0~1。4）、非线性失真（包络失真）：调制器的调制特性不能跟调制电压线性变化而引起已调波的包络失真为调幅发射机的非线性失真。一般要求要小于10%。31高频电子线路设计报告5