------------------------------------------------------------------------------------------------ ——————————————————————————————————————无线传输信道的特性通信工程专业研究方法论学院:专业: 班级: 学号: 学生: 指导教师: 电子信息工程学院通信工程毕红军 2014 年8月 1 目录一、引言: ............................................................................................ .................... ....................... 2 二、无线电波传播频段及途径....................................................................................................... 3 无线电波频段划分..................................................................... ........................................ 3 无线电波的极化方式......................................................................................................... 4 ------------------------------------------------------------------------------------------------ —————————————————————————————————————— 传播途径............................................................................ ...................................... ........... 4 三、无线信号的传播方式............................................................................................................... 5 直线传播及自由空间损耗...................................................... ........................................... 5 反射和透射................................................................................................................ ........ 6 斯涅尔( Snell )定律.................................................. ............................................ 6 ? d 功率定律......................................................................................................... 7 断点模型.................................................................... ............................................ ..8 绕射................................................................................................................ .................... 9 单屏或楔形绕------------------------------------------------------------------------------------------------ —————————————
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