Ku波段卫星广播中雨衰现象的研究

对Ｋｕ波段电波传播的特点进行了分析，根据ＣＣＩＲ建议的方法和接收天线的仰角及电波的极化角数值，对Ｋｕ波段的雨衰进行了定量计算，并将雨衰曲线标在全国地图之上，根据雨衰曲线可以对卫星Ｋｕ波段转发器天线的波束图进行优化设计，也可以对卫星接收系统进行合理的设计以减少降雨产生的影响。

Study of the rain attenuation in the satellite broadcast of Ku band

In this paper, the authors analysed the characteristic of wavepropagation in Ku band, calculated the value of rain attenuation for the Ku band repeaters in SINOSATI and 87.5E Satellites, according to the relative CCIR Recommendations, elevation of receiving antenna and polorization tilt angle, and marked the attenuation curves on the map of China. These curves is obviously convenient to be used by satellite broadcast and telecommunication engineers. Based on these curves, we can optimize the pattern of the onboard antenna of the satellite as well as the design of a satllite receiving system.