混合体的有效介电常数  

Equivalent Permittivity Dielectric Mixtures

作　　者：李瑾[1] 

机构地区：[1]陕西学前师范学院物理与电子技术系,陕西西安710100

出　　处：《咸阳师范学院学报》2014年第2期11-14,共4页Journal of Xianyang Normal University

基　　金：国家自然科学基金项目(61271110;61102018);陕西学前师范学院科研基金项目(2013KJ069);教改基金项目(13JG030Q)

摘　　要：基于复合介质单位体积电场能量守恒,得到了复合介质的有效介电常数,以文献给出的有效介电常数模型为基准,验证了文中结果的有效性。结合现有文献,研究了降雨及沙尘暴的有效介电常数,结果表明:降雨的有效介电常数随温度敏感的变化,当能见度较大时,沙尘暴有效介电常数的变化可以忽略;算法简单明了,为研究其他复杂介质的电磁波传播做了有益的探索。The effective permittivity of dielectric mixtures is presented in this paper based on elec- tric energy conservation of a unit volume for the dielectric mixtures. Its validity is tested by comparing its result with that from the available references about effective permittivity~ Based on the reference the effective permittivity for rainfall and sand dust-storm are researched. Simulations show that the effec- tive permittivity for rainfall varies sensitively with the temperature and that variation with the visibility for the sand dust-storm may be ignored under the case of a large visibility. The algorithm used in this paper is simplicity. It has been a beneficial exploration of electromagnetic wave propagation in other di- electric mixtures.

关 键 词：混合体 介电常数 静电能 

分 类 号：O482.4[理学—固体物理]