基于裁剪分形结构的双陷波小型UWB天线设计研究  

Research on a Miniatured Add-and-Cut Fractal UWB Antenna with Dual Band-notched Characteristic

作　　者：许悦昕 钟选明[1] 廖成[1] XU Yuexin;ZHONG Xuanming;LIAO Cheng(Institute of Electromagnetic Theory and Microwave Technology,Southwest Jiaotong University,Chengdu Sichuan 610000,China)

机构地区：[1]西南交通大学电磁场与微波技术研究所,四川成都610000

出　　处：《通信技术》2021年第8期2019-2025,共7页Communications Technology

摘　　要：为满足户外环境中识别和定位天线的宽频带、小型化以及系统兼容性的需求,提出一种具有陷波性质的小型改进式分形结构超宽带(Ultra-Wide Band,UWB)天线。天线基于Sierpinski阵列以获得小型化效果,并通过对分形元做有目的的增添-裁剪以获得陷波特性,综合二者达到超宽带性能。该设计有效简化贴片阵列结构,同时实现了3.1~3.8 GHz、8.2~8.9 GHz的双频带陷波性质,避免了与户外全球互通微波访问(Worldwide Interoperability for Microwave Access,WiMAX)无线通信系统和X波段雷达的相互影响。该天线全向性良好、性能稳定,结构简明易于生产装配,可用于所需的各种超宽带系统中。In order to meet the requirements of wide frequency band, ease of design and assembly, and electromagnetic compatibility of the system, a small improved fractal structure ultra-wide band(UWB) antenna with notching properties is proposed. The antenna is based on the Sierpiński fractal theory to obtain miniaturization effect. The coplanar waveguide is used to simplify the design of the feed part, and the two are integrated to achieve ultrawideband performance. An additive-cut design method is proposed, which is improved on the classical Sierpiński structure. It not only optimizes the antenna structure, but also realizes the dual-band notch properties of 3.1 to 3.8 and 5.1 to 5.9, effectively avoiding the mutual influence with the outdoor global interoperability for microwave access(Worldwide Interoperability for Microwave Access, WiMAX) wireless communication system and X-band radar. The antenna has good omnidirectionality, stable performance, simple structure, easy production and assembly, and can be used in various ultra-wideband systems required.

关 键 词：超宽带 分形结构 小型化 陷波特性 

分 类 号：TN958[电子电信—信号与信息处理]