基于NURBS的反射面天线曲面建模及仿真验证  

Modeling and Simulation of Reflector Antenna Based on NURBS

作　　者：张魏[1] 雷雪[1] 邢锋[1] 郎国伟 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《信息工程大学学报》2017年第1期31-34,共4页Journal of Information Engineering University

摘　　要：自由曲面不能通过解析表达也无法由简单曲面组合而成,不能直接建模,文章提出一种基于NURBS的复杂反射面天线曲面建模方法,通过给定的型值点对反射面天线进行曲面重构,反算NURBS曲面控制顶点和权因子,并用蒙面法构造NURBS曲面,针对环焦天线模型分别用NURBS建模和CST建模,并在相同的仿真环境中进行对比验证。结果表明NURBS曲面建模技术用于反射面天线的建模设计中具有可行性,最后给出一个NURBS建模的复杂椭圆波束天线设计实例。Considering it is difficult to model the free surface which can not be expressed by analytic equation or made up by simple surface, this paper proposes a new surface modelling method for com- plex reflector antenna based on the Non-Uniform Rational B-Spline surface modeling. The given data points are used to reconstruct the reflector surface and reverse control points and weight. Then the NURBS surface is constructed by skinning method. NURBS modeling and CST modeling are used re- spectively to get the ring focus antenna models, which are then verified and compared in the same simulation environment. The results show that it is feasible for reflector antenna to be modeled by NURBS surface modeling techniques. Finally, a complex elliptic beam antenna design example is given based on NURBS modeling.

关 键 词：NURBS建模 复杂曲面 型值点 蒙面法 反射面天线 

分 类 号：TN820[电子电信—信息与通信工程]