多源共波束辐射系统设计  

Design of Multisource Co-beam Radiation System

作　　者：朱守正[1] 罗阳[2] 

机构地区：[1]华东师范大学信息科学与技术学院,上海200062 [2]上海师范大学信息与机电工程学院,上海200234

出　　处：《微波学报》2013年第5期150-154,共5页Journal of Microwaves

基　　金：国家自然科学基金(61172032);上海市自然科学基金(12ZR1447000);上海市教育委员会科研创新项目(14YZ071);上海师范大学创新团队发展计划(DXL125)及一般科研项目(SK201316)

摘　　要：变换电磁学中运用折叠变换可以设计基于负折射材料的完美透镜使原始空间的一个点映射到变换空间中的多个点,它们互为像点。当馈源放置在某一点时其辐射波束会汇聚到其它点,而系统的辐射模式均等效于馈源放置在原始空间馈电点处时的辐射模式。运用这一特性可以构建高效的天线系统,在理论上可使得偏焦的馈源产生与正馈馈源等效的辐射特性从而解决偏馈辐射主波束不在主轴的问题。文中详细设计了一种用于构建辐射系统的三角形结构透镜,计算出了透镜各部分材料参数的表达式,并用一些实例的全波仿真结果验证了理论设计。Using transformation electromagnetics perfect lens based on negative material can be tailored, by which a point in the original space will map to several points in the folded geometry. Those points are images to each other, which mean that the radiation beams coming from one point will focus at the other points. And the equivalent radiation pattern will be achieved in that way. Using this property, novel high-efficient antenna system can be designed. Such a system can make the offset sources generate beams that are reflected back along the major axis in reflector antennas, a problem that previously has not been satisfactorily solved by any traditional methods. A triangular perfect lens is studied in detail. The constitutive parameters are calculated. Several specific examples and their full-wave simulations are also given to validate the analyses in this paper.

关 键 词：变换电磁学 多源共波束 负折射材料 

分 类 号：O441[理学—电磁学]