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随着我国改革开放的不断深入,经济的飞跃发展,卫星单接收站在我国发展很快,数以万计的单接收站将建成使用。随着航天工业的高速发展,元器件和技术水平的提高,卫星的发射功率增大,单收站将朝着小型化发展。当卫星发射功率EIRP=38Bbw时,电视单接收站的天线可以从现在的6m减小到3m至2m。此外,电视图像的质量同时也在逐步提高。就目前的S/N=46dB,仅相当于3分的水平,如能提高到49dB(D.K.L加仅),达到3.5—4分的水平,就可以保证集体接收系统重播质量,达到国家规定的收看标准。
With the deepening of China’s reform and opening up and the rapid development of economy, satellite receiving stations have developed rapidly in our country and tens of thousands of single receiving stations will be built and used. With the rapid development of aerospace industry, the improvement of components and technology, the transmission power of satellites will increase, and the single receiving station will develop toward miniaturization. When the satellite transmit power EIRP = 38Bbw, the antenna of a single receiving station of the television can be reduced from the current 6m to 3m to 2m. In addition, the quality of television images is also gradually increasing. The current S / N = 46dB, the equivalent of only the level of 3 points, such as can be increased to 49dB (DKL plus only), reached the level of 3.5-4 points, you can ensure the mass reproduction of the collective receiver system to meet the state’s watch standard.