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由于井下环境不利于无线电信号传播,所以地下矿应用无线电通讯方面落后于其他行业。若在井下使用通常的甚高频(VHF)无线电设备进行通讯,则在距离为数百米时,通讯会突然中断。即使将发射功率加大到25瓦也无济于事。将频率升高到
As the underground environment is not conducive to the spread of radio signals, underground mining applications fall behind other industries in terms of radio communications. When using normal VHF radios downhole for communications, the communication suddenly aborts when the distance is several hundred meters. Even if the launch power is increased to 25 watts also not help. Increase the frequency to