For controlling light pollution and protecting the dark sky resource,origin of sky glow from the atmosphere dispersion was analyzed,research progress and primary results on night sky brightness models,including a model between night sky brightness and the urban population,the distance and a model between night sky brightness and dispersion forms,were discussed.
文章从防治光污染、保护暗天空资源的角度,理论分析了夜天空发亮的原因,讨论了夜天空亮度分布模型的研究进展和主要成果,其中主要包括夜天空亮度与城市人口、距离变化关系的模型以及夜天空亮度与散射方式关系的模型,并进一步提出了城市夜天空保护方面深入研究的理论框架。
The radiation characteristic of a single antenna is analyzed by using the theory of microwave network,and the scattering matrix equation of coupling system of near-field antenna is obtained.
依据微波网络理论对单个天线的空间辐射特性进行了分析,并得到近场耦合系统的散射矩阵方程,依此得出结论是只要探头特性已知,探头只需两次正交极化的测量就可确定天线的辐射特性。
