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一、概述微波中继传输电视信号是采用空间波传播的.传播过程中往往出现衰落现象,其原因是多方面的.根据微波传播规律,选择有利的传播条件,提高微波电路的可靠性是具有实际意义的.正常情况下建设微波电路要选择路径、站距、站址、计算天线高度及设备技术条件.但是不少地方电视台没有这种可能和手段,如电视台址确定后,路径、站距就固定了,设备固定后也无选择的余地,在此情况下只有选定天线高度,保证接收信号强度,减少微波
I. Overview Microwave relay transmission TV signal is the use of space wave propagation.Diffuse phenomenon often occurs in the transmission process for many reasons.According to the microwave propagation law, select the favorable propagation conditions, to improve the reliability of the microwave circuit is to have In practice, microwave circuit construction under normal circumstances to choose the path, station distance, site, calculate the height of the antenna and equipment and technical conditions, but many local television stations do not have such a possibility and means, such as the television station is located, the path, It is fixed, the equipment has no choice after fixing the room, in this case only the selected antenna height, to ensure that the received signal strength, reduce the microwave