近年来使用小电台作为通信工具的民用单位越来越多,电台数量亦剧烈增加。甚高频(VHF)无线电频率拥挤,在无线电区内多种频率的电台同时工作的现象发生了。这样一来,如果不谨慎地进行电台通信网的设计,电台在工作时就要产生严重干扰,甚至不能工作。尤其是在移动无线通信中,电波电平波动的动态范围可 In recent years, there have been more and more civil units using small radio stations as communication tools, and the number of radio stations has also risen sharply. Very high frequency (VHF) radio frequency congestions occur in the radio zone at the same time a variety of radio stations work at the same time. As a result, if the design of the radio communications network is not done with care, the radio station will have serious interference with the work or even fail to work. Especially in mobile wireless communication, the dynamic range of the fluctuation of the radio wave level may be