通过使用诸如跨频段传播，分割成块和“智能”天线技术使传输中的无线电波填充更多的信息。
Radio has been cramming ever more information into the transmission, using techniques such as spreading it across the spectrum, dividing it up into portions and using "smart" antennae.
数值分析的结果表明，UHF无线电波的较高频段能够在长壁工作面上传播。
The numerical result shows that the propagation of UHF radio waves favors high frequency.
研究UHF频段的无线电波在矩形、圆形和拱形隧道中的传播特性，推导了衰减常数的计算公式。
Propagation characteristic of UHF radio wave in rectangle, circle and arched tunnels is studied in this paper and the computing equation for attenuation constant is deduced.
研究UHF频段的无线电波在矩形、圆形和拱形隧道中的传播特性，推导了衰减常数的计算公式。
Propagation characteristic of UHF radio wave in rectangle, circle and arched tunnels is studied in this paper and the computing equation for attenuation constant is deduced.
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