毫米波非大气窗口波段在水凝体中传播特性研究
关键词 60GHz、118GHz 毫米波 衰减 MPM模型 云、雨、雾、雪
毕业论文设计说明书（论文）外文摘要
Title Characteristics of non-atmospheric window band millimeter wave propagation in the hydrogel
Abstract
60GHz and 118GHz waveband is the non-atmospheric window waveband, when propagating in atmosphere, it is attenuated for absorption and scattering of different atmospheric condition. In this paper, the attenuation of 60GHz and 118GHz waveband caused by the absorption of oxygen and water, cloud, rain, snow , is researched. According to appropriate model , the attenuated of 60GHz and 118GHz waveband are researched under a variety of conditions. And comparing to the measured data from the related literature, the simulation result in this paper is closed to the measured data. First, based on the MPM model, the propagation characteristics of millimeter-wave is researched and simulate in the condition of clear sky, and then oxygen absorption is verified. Second, considering clouds, rain, snow as the main factors which cause the attenuation,the absorption and scattering effect of millimeter-wave caused by them are researched. In the end it comes to the conclusion that in the condition of clouds, snow, the rate of attenuation is proportional to the water content; And in the condition of rain, the more the water content is , the greater the attenuation is caused. The condition of snow not only has the effect of the absorption of water, but also generate attenuation for the reason of scattering. But the attenuation which is generated by scattering is not greatly. A variety of attenuation must be considered when a variety of weather conditions exist at the same time. Finally, the complex attenuation of the cloud, fog, rain, snow and other atmospheric conditions are discussed, and discuss its practical application in terms of radar.This research is important for developing the millimeter communication，remote-sensing and so on system in civil and military applied to desert region.
Keywords 60GHzand118GHz Millimeter wave attenuation
MPM cloud、rain、fog、snow
目次
1 绪论 3
1.1 研究背景和意义 3
1.2 毫米波传播特性研究概况 3
1.3 论文章节安排 4
2 晴空大气下的衰减特性 5
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