摘要
从射线的矢量方程出发 ,假设射线折射角的变化和群路径的变化是平滑的 ,文章提出了三区分划处理法 ,把射线路径按照不同的物理规律分为平滑区、介电常数的“极小值”区和拐点区。拐点区和介电常数的“极小值”区并不重合 ,一般拐点区位于介电常数的“极小值”区两侧。当在拐点区和介电常数的“极小值”区射线平滑性有可能被破坏时 ,有必要进行针对性的处理。文中以二维的带有水平梯度的指数分层的电子浓度不均匀体等离子体频率分布为例 ,展示了三区分划处理法的必要性和在射线追踪中的优点。
Starting from the vector ray equation, according to the smoothness of the variation of the refraction angle and the group path of the ray, a ray path is divided into three zones which are the smooth zone, the minimal dielectric constant zone and the inflexion zone. Thus the three zoning treatment method is put forward.The inflexion zone and the minimal dielectric constant zone do not coincide with each other, and usually the inflexion zone locates at the both sides of the latter.In the case of the smoothness of the ray is destroyed at the inflexion zone and the minimal dielectric constant zone, the special treatment is needed.Some examples are presented to show the necessity and the advantage of the three zoning treatment method.
出处
《电波科学学报》
EI
CSCD
2001年第2期222-226,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金 (4990 40 10 )
国家教育部博士点基金资助项目 (RFDP19990 4860 2 )
关键词
射线追踪
三区分划处理法
电波传播
ray tracing three zoninc treatment smooth zone minimal dielectric constant zone inflexion zone
