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随着我国电视事业的发展,电视信号的发射频率由VHF(甚高频)向UHF(超高频)扩展,可以供用户收看的电视节日越来越多。但是由于发射的频率愈高,波长愈短,传播辐射能力差。另外,在城市受到高层建筑的影响;在边远地区受到高山和传播距离的
With the development of the television industry in our country, the transmission frequency of television signals is expanded from VHF (VHF) to UHF (Ultra High Frequency) and more and more TV festivals can be watched by users. However, due to the higher the frequency of emission, the shorter the wavelength, the worse the ability to transmit radiation. In addition, the city is affected by high-rise buildings; in remote areas are affected by high mountains and distance