摘要
结合巷道(隧道)的特殊结构及无线信号的传输特性,通过对电磁波极化方式的理论分析,并在横截面高度为3m、宽度为2m的巷道中进行了实际测试,通信频率433MHz,发射功率为-30～-25dBm,接收灵敏度为-105dBm,线极化收发天线增益2dBi,收发数据未进行编码处理。通过对电磁波极化理论与实际的测试结果分析得出,矩形巷道(隧道)高度H与宽度W相比较,当H﹥W,垂直极化方式的传输效果优于水平极化;当H﹤W,水平极化方式的传输效果优于垂直极化。
Combined with special structure of tunnel and wireless signal transmission characteristics,and analysis of electromagnetic wave polarization,the paper present the measurements of wireless communication in tunnel,the height of tunnel is 3 m and the width of tunnel is 2 m,the testing frequency is 433 MHz,transmit power is from -30 dBm to -25 dBm,receive sensitivity is -105 dBm,the gain of linear polarization antenna is 2 dBi,the transform data is not coding.Through theoretical analysis on electromagnetic wave polarization and measurements,rectangular tunnel height is H and width is W,when HW,the vertical polarization mode is better than horizontal polarization;when HW,horizontal polarization mode is better than vertical polarization.
出处
《电信科学》
北大核心
2010年第7期76-79,共4页
Telecommunications Science
基金
中国博士后科学基金资助项目(No.20080431134)
辽宁省博士科研启动基金资助项目(No.20091004)
关键词
垂直极化
水平极化
反射波
透射波
巷道
vertical polarization
horizontal polarization
reflection wave
transmission wave
tunnel
