一种宽带高效反射型超材料极化旋转器  

Broadband and high-efficiency reflective polarization rotator using metamaterials

作　　者：任宇辉 丁君[1] 郭陈江[1] 邢天璋[2] 王夫蔚[2] REN Yuhui DING Jun GUO Chenjiang XING Tianzhang WANG Fuwei(School of Electronics and Information, Univ. of Northwestern Polytechnical, Xi＇an 710129, China School of Information Science and Technology, Northwest Univ., Xi＇an 710069, China)

机构地区：[1]西北工业大学电子信息学院,陕西西安710129 [2]西北大学信息科学与技术学院,陕西西安710069

出　　处：《西安电子科技大学学报》2017年第5期171-176,共6页Journal of Xidian University

基　　金：西安爱生创新发展基金资助项目(ASN-IF2015-0901)

摘　　要：采用六边形金属贴片状超材料结构,设计并制作了一种宽带、反射型极化旋转器.该结构可以在较宽的工作频带内将特定角度入射的线极化波旋转90°,从而使反射波与入射波极化正交.根据各向异性理论解释了极化旋转器的工作原理,分析了该结构的等效电路,仿真了主要参数对其性能的影响.最终通过实际加工、测试证明了:当电磁波垂直入射时,该结构在8.41~11.3GHz的频带内极化转换率大于90%.A wideband and high-efficiency 90°p01arization rotator based on ultrathin planar metamaterial is presented. It consists of the metallic hexagonal patches on the top layer of the dielectric substrate and a metallic film on the bottom layer. Initially, the explanation of the physical mechanism for the polarization rotator is presented according to the anisotropy media theory. Thereafter, we have discussed the influences of the structure dimension on the performance of the proposed polarization rotator. And finally, the structure is also fabricated. Results of the test show that it exhibits over 90° polarization conversion ratio from 8. 41 GHz to 11.3 GHz in the condition of normal incidence.

关 键 词：极化旋转器 超材料 各向异性媒质 

分 类 号：TN823[电子电信—信息与通信工程]