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1.前言随着我国电子工业的发展,电视将会迅速地普及,在不久的将来,电视广播网将遍布于全国各地。但由于电视采用超短波频道,电波是沿着直线传播的。尽管很仔细合理地选择安装发射机的地点,总还是有些地区收不到电视广播,尤其是山谷深处,因电波被群山所阻挡,
1. Introduction With the development of China’s electronics industry, television will be rapidly popularized. In the near future, the television broadcasting network will be spread all over the country. However, due to the use of ultra-short-wave television channels, radio waves are transmitted along the straight line. Despite the careful and reasonable choice of where to install the transmitter, there are still areas that do not receive television broadcasts, especially in the depths of the valley, where radio waves are blocked by mountains,