短波通信系统介绍.docx

短波通信系统介绍

第一篇：短波通信系统介绍一、短波通信概述............................................................................................................2二、短波通信的优势........................................................................................................2三、短波通信的一般原理.................................................................................................33.1.无线电波传播......................................................................................................33.2电离层的作用.....................................................................................................43.3短波频率范围.....................................................................................................43.4短波传播途径.....................................................................................................5四、单边带概念...............................................................................................................54.1单边带的定义.....................................................................................................64.2单边带的优点.....................................................................................................6五、优化短波通信的方法.................................................................................................65.1正确选用工作频率..............................................................................................65.2计算机测频..........................................................................................................75.3正确选择和架设天线地线....................................................................................7六、短波电台天线知识.....................................................................................................86.1了解天线的基本工作原理.....................................................................................86.2正确选择电台天线...............................................................................................86.3正确处理天线价格与质量的关系..........................................................................96.4常用的天线...