一种应用于平方公里中频阵的锥削槽天线阵的设计  

Tapered slot antenna array for mid-frequency aperture array of the Square Kilometer Array

作　　者：曹锐[1] 卢保军 郭肖肖[2] 桑磊 CAO Rui;LU Baojun;GUO Xiaoxiao;SANG Lei(Key Lab of Aperture Array and Space Application, No.38 Research Institute, China Electronics Technology Group Corporation, Hefei 230088,China;Hefei University of Technology, Hefei 230009, China)

机构地区：[1]中国电子科技集团公司第三十八研究所孔径阵列与空间探测安徽省重点实验室,合肥230088 [2]合肥工业大学,合肥230009

出　　处：《电波科学学报》2019年第3期363-370,共8页Chinese Journal of Radio Science

基　　金：国家重点研发计划资助项目(2016YFE0100500)

摘　　要：设计了一种应用于平方公里中频孔径阵列的双极化超宽带锥削槽天线.该天线采用五边形谐振腔代替传统锥削槽天线的正方形谐振腔,在不占用有源电路面积的情况下,拓展了低频工作带宽;采用辐射板与馈电巴伦分离设计,在不影响天线电性能的前提下,极大地缩小了介质板尺寸以节约加工成本;天线加工成十字形结构以实现阵元间良好的电流连续性和不恶化天线的极化性能.仿真结果显示,该天线能够在0.25~1.57GHz带宽内进行±45°扫描,且在整个工作频带内具备较好的极化特性,因此所设计天线能够满足平方公里(the Square Kilometer Array,SKA)中频阵超宽带、低成本、大扫描角以及高极化隔离度的要求.A dual-polarized ultra-wideband tapered slot antenna for a square kilometer Intermediate frequency aperture array is designed. The antenna adopts a pentagon resonator instead of the square cavity of the conventional tapered slot antenna, and expands the low-frequency working bandwidth without occupying the active circuit area. The antenna adopts a pentagon resonator instead of the square cavity of the conventional tapered slot antenna, and expands the low-frequency working bandwidth without occupying the active circuit area. The radiant panel and the feed balun are separated designed, thus, the size of the dielectric plate can be greatly reduced to save processing cost, and the electrical performance of the antenna can be maintained. The antenna is processed into a cross-shaped structure to achieve good current continuity in the array elements and not deteriorate the polarization performance of the antenna. The simulation results show that the antenna can scan in the bandwidth of 0.25-1.57 GHz and has better polarization characteristics in the whole working frequency band. Therefore, the design of antenna can fulfill the requirements of the Square Kilometer Array (SKA) in the ultra-wideband intermediate frequency,low cost, large scan angle and high polarization isolation.

关 键 词：平方公里阵 中频孔径阵列 双极化 五边形谐振腔 十字形结构 

分 类 号：TN821[电子电信—信息与通信工程]