基于准共形变换的人工电磁材料相控阵天线研究

项目名称： 基于准共形变换的人工电磁材料相控阵天线研究

项目编号： No.61501362

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 雷娟

作者单位： 西安电子科技大学

项目金额： 23万元

中文摘要： 变换光学(transformation optics, TO) 能通过人工电磁材料实现对电磁波的任意调控。准共形变换光学(quasi-conformal transformation optics ,QCTO)相比于传统TO的优势在于使所变换媒质的各向异性最小化，实现宽带非磁性的各向同性媒质，显著降低材料的实现难度。本项目研究基于QCTO的人工电磁材料相控阵天线，通过在阵列上覆盖具有特定媒质参数的材料，可实现与自由空间中另外一个虚拟阵列相同的辐射性能，从而在保持自身形状的同时，具有虚拟阵列的所有优点，为相控阵设计开辟了新的思路。整个项目研究以虚拟空间与物理空间的准共形变换为基础，获得非均匀的各向同性媒质分布，通过对人工电磁材料的设计，实现新型相控阵天线，可突破传统阵列由于自身物理结构引起的设计方法和辐射性能上的局限性。

中文关键词： 相控阵；人工电磁材料；变换光学；准共形变换

英文摘要： Transformation optics (TO) provides an approach to control electromagnetic fields at will via metamaterials. Compared to the conventional TO method, the quasi-conformal transformation optics (QCTO) has the advantage of minimizing the anisotropy of transformation media, thus achieves the non-magnetic broadband isotropic metamaterials, which can be realized by all-dielectric structure. In this project, the phased array antennas with metamaterials based on QCTO are researched. When being coated with the transformation media with specific parameters , the physical array can radiate just like another different virtual array, so that all the advantages of the virtual array can be retained, which provides a new way for the phased array antenna design. Based on the quasi-conformal transformation between the virtual and physical space, the inhomogeneous isotropic media distribution is obtained and the novel phased array can be realized by the design of metamaterials, which is a breakthrough in solving the limitations of design method and radiation performance of conventional phased arrays determined by their physical structures.

英文关键词： Phased array antennas;Metamaterials;Transformation optics;Quasi-conformal transformation