渐变宽度分形环宽带天线的设计与研究  

Design and research of fractal ring broadband antenna with gradual width

作　　者：王丽黎[1] 邓雯 杜忠红 常雪迎 WANG Lili;DENG Wen;DU Zhonghong;CHANG Xueying(School of Automation and Information Engineering,Xi􀆳an University of Technology,Xi􀆳an 710048,China)

机构地区：[1]西安理工大学自动化与信息工程学院,陕西西安710048

出　　处：《电子元件与材料》2023年第5期611-617,共7页Electronic Components And Materials

基　　金：国家自然科学基金(61771389)。

摘　　要：针对现有天线结构过于单一、工作带宽较窄以及尺寸较大的问题,提出了一款适用于S、C、X、Ku和部分K波段的渐变宽度分形环宽带天线。该天线采用三阶圆环迭代层叠的分形结构作为辐射贴片,由微带线经阻抗变换后馈电,并采用缺陷接地结构作为接地板,有效改善了天线的阻抗匹配,实现了天线良好的多频和宽带特性。通过仿真模型和优化参数,天线的最终尺寸为34 mm×25 mm×1.6 mm,其相对带宽可达153.5%(2.63~20 GHz),增益为2.9~9.8 dBi。该天线结构紧凑、体积较小,且在工作频段内具有较好的全向性和稳定的增益,可以应用于各种宽频带通信系统中。天线的实测和仿真结果基本吻合,验证了天线设计的有效性。A fractal ring broadband antenna with gradual width for S,C,X,Ku,and partial K-bands was proposed to address the issues of the single structure,narrow operating bandwidth,and large size of the existing antennas.A fractal structure with a third-order circular iterative lamination as the radiating patch was used,and the attenna was fed by a micro-strip line via impedance transformation.A defective ground structure was applied as the grounding plate,which significantly improved the antenna's impedance matching and resulted in good multi-frequency and broadband characteristics.With the simulation model and parameter optimization,the antenna size is finally determined as 34 mm×25 mm×1.6 mm,its relative bandwidth is 153.5%(2.63-20 GHz),and the gain is 2.9-9.8 dBi.The antenna is compact,small in size,and has good omnidirectionality and stable gain in the operating band,which can be used in various broadband communication systems.The measured results of the antenna are consistent with the simulation.So its validity was verified.

关 键 词：分形结构 宽带 多频 缺陷地结构 阻抗匹配 

分 类 号：TN82[电子电信—信息与通信工程]