水平气流中微波折射率结构常数建模

发布时间：2018-02-25 00:21

本文关键词： 折射率结构常数微波水平气流水汽压　出处：《上海大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：电磁波在大气中传输时会受到大气湍流的影响,湍流的强弱可以用折射率结构常数C2n来表示.在2.4 GHz的微波环境下,重点研究了微波段空气中水汽压对大气折射率结构常数的影响.温湿度结构常数的计算选择湍流动能(turbulence kinetic energy,TKE)闭合方案,由耗散率方法求得,修正了干燥空气的归一化公式,在水平气流环境中构建了微波折射率结构常数的模型.结合隧道环境中实测的气象参数,采用该模型分析实验时的微波折射率结构常数,得到在2.4 GHz的微波环境下,湿度对折射率结构常数的贡献大于温度.
[Abstract]:Electromagnetic waves are affected by atmospheric turbulence when they propagate in the atmosphere. The intensity of turbulence can be expressed by the refractive index structure constant C2n. In the microwave environment of 2. 4 GHz, The influence of water vapor pressure in microwave section on the refractive index structure constant of the atmosphere is studied emphatically. The turbulent kinetic energy kinetic energy TKE closure scheme is chosen for calculating the structure constant of temperature and humidity. The normalized formula for dry air is modified by the dissipation rate method. A model of microwave refractive index structure constant in horizontal airflow environment is constructed. Combining the measured meteorological parameters in tunnel environment, the microwave refractive index structure constant in the experiment is analyzed by this model, and the microwave refractive index structure constant is obtained under the microwave environment of 2. 4 GHz. The contribution of humidity to the refractive index structure constant is greater than that of temperature.
【作者单位】：上海大学通信与信息工程学院;上海大学特种光纤与光接入网省部共建重点实验室;
【基金】：国家自然科学基金资助项目(61271061,61171086) 上海大学创新基金资助项目(SDCX2012064)
【分类号】：TN011

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