论文部分内容阅读
随着卫星广播事业的发展,世界各国均较重视这方面的研制技术,特别是CCIR建议的并为多数地区采用的12千兆赫频段颇有发展前途.对一般用户只需60厘米直径的抛物面天线即可直接收看卫星电视节目;对中心转播站或边照区的中心站;若采用低噪声参量放大器,亦可用不太大的抛物面天线(如4米以下)而能收到合乎质量标准的图象.为此,我们于1979年底研制成功12千兆赫卫星直播电视接收站.
With the development of satellite broadcasting, all countries in the world pay more attention to the research and development technology in this area, especially the 12 GHz band recommended by CCIR and adopted in most regions. The average user only needs 60 cm diameter parabolic antenna You can directly watch satellite TV programs; center of the relay station or border area of the central station; with low noise parametric amplifier can also be used not too large parabolic antenna (such as 4 meters below) and can receive quality standards For this reason, we developed the successful 12 giga satellite live TV receiving station by the end of 1979.