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矿井无线通信的一个发展方向是以甚高频为主的矿井无线通信。在甚高频系统中 ,射频的的频率合成器部分采用DDS/PLL技术。DDS/PLL可实现频率范围宽、频率转换速度快、频率分辨力高、相位噪声低和杂散小
One of the development directions of mine wireless communication is mine wireless communication based on VHF. In VHF systems, the RF synthesizer section uses DDS / PLL technology. DDS / PLL achieves wide frequency range, fast frequency conversion, high frequency resolution, low phase noise and small spurs