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.doc
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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
目录
摘要···················································3
设计指标··········································3
1、发射部分··········································3
2、接收部分··········································3
二、 调幅发射机
1、设计要求··········································4
2、设计目的··········································4
3、设计实现··········································4
3.1、系统概述·····································4
3.2、单元电路设计与分析···························5
3.2.1、小信号调制模块····························5
3.2.2、高频载波模块······························7
3.2.3 集电极调幅模块·····························9
4、调幅发射机总图····································11
三、差外差式接收机
1、设计要求 ········································12
2、系统框图·········································12
3、各模块分析设计和仿真·····························13
3.1、高频小信号放大器模块·························13
3.2、混频器模块···································16
3.3、本地振荡器模块·······························18
3.4、中频放大器模块·······························20
3.5、包络检波器模块·······························22
4、总电路原理图·····································24
四、元器件清单
1、发射机清单········································24
2、接收机清单········································25
五、问题讨论···········································27
六、心得体会···········································27
七、参考文献···········································28
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】 Multisum AM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
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