三阻带特性的超宽带天线研究与设计  

Design of ultra-wideband antenna with three stop-band characteristics

作　　者：白玉[1] 杨晓冬[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2012年第12期1539-1546,共8页Journal of Harbin Engineering University

基　　金：黑龙江省自然基金重点资助项目(ZD201115)

摘　　要：针对超宽带通信与现有的民用通信存在频带交叠的问题,提出一种使用共面波导馈电的具有三阻带特性的超宽带天线.在此款天线中的超宽带天线原型从本质上来看是偶极子天线,故此具有很好的全向特性.同时使用三阶的开路存根结构和缺陷地结构来分别完成3个阻带抑制设计.3个阻带的设计相对独立,故此可以独立调节.为了验证天线的时域特性,利用电磁仿真软件CST对该天线进行了全波的时域仿真分析.最后通过实际测试进一步验证天线在3.1～10.6 GHz的全超宽带频段具有良好的全向特性,同时在WLAN、Wimax及C波段和X波段卫星通信频段具有良好的阻带抑制特性.For solving the problem of band overlap between the ultra-wideband（UWB） communication and existing civil communication,a new type of coplanar waveguide（CPW） fed UWB antenna with three-stop-band characteristics is proposed in this paper.The essence of the prototype of proposed UWB antenna is a dipole antenna;therefore it has good omni-directional characteristics.Three-stop-band is obtained by embedding 3-step open circuit stubs and a step Impedance resonator-defected ground structure（SIR-DGS） in the ground plane,which can be controlled independently by respectively adjusting the length of the stub and the width of the DGS.The time domain characteristics of the antenna were simulated and analyzed through full-wave time domain simulations with the electromagnetic simulation software（CST）.The actual tests further proved that the proposed antenna has a better omni-directional characteristics in the ultra wide bandwidth range of 3.1~10.6 GHz.The test results also indicate it has better stop band characteristics in the satellite communication frequency range of WLAN,Wimax,C-band and X-band.

关 键 词：共面波导 三阶开路存根 阶跃阻抗缺陷地结构 三阻带 超宽带线 

分 类 号：TN821[电子电信—信息与通信工程]