毫米波空间传播“雨衰”的计算

Rain Attenuation Calculation of Millimeter Wave Transmision in the Space

雨衰减是造成电磁波传输损耗的主要因素之一,而极高频段电波的"雨衰"更为严重。现在大多数传输损耗研究只限于单纯雨对电磁波造成的衰减,并未考虑电磁波自由空间造成的损耗。文章从两个方面研究了毫米波在空间传输时的损耗,一方面通过mie理论结合雨分布谱研究单纯的雨衰减带来的损耗,另一方面分析毫米波的空间传输带来的损耗。最后结合两方面因素推导出新的"雨衰"公式,并且通过计算机仿真出不同降雨强度下,"雨衰"随频率变化的新的曲线。结论表明总的损耗明显高于单纯雨衰减损耗。

Rain attenuation is mostly wasting in electromagnetic wave transmision,moreover,the rain attenuation of sky-high frequency electromagnetic wave is much more strictness.Now,most of wasting is studing only limit to pute rain attenuation.And not take into account transmision wasting in space the article study attenuation wasting of millimeter wave from two sides,one the one hand,pute rain attenuation is studed by mie theory with rain distributing model,on the other hand,studing transmision is wasted in space.In the end,article educe new formulae of attenuation wasting and make curve of differ rainfall intensity with frequency by computer calculating.Conclusion indicate total wasting distinctness bigger than pute rain attenuation.