基于特征模理论分析的超宽带小型化准八木天线设计  

Design of Ultra-wideband Miniaturized Quasi-Yagi Antenna Based on Characteristic Mode Theory

作　　者：廖国君 姜兴[1] 孙逢圆[1] 彭麟[1] LIAO Guojun;JIANG Xing;SUN Fengyuan;PENG Lin(College of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004

出　　处：《微波学报》2024年第2期8-13,共6页Journal of Microwaves

摘　　要：文中设计了一款超宽带准八木天线。根据特征模理论对传统的准八木天线进行分析,并结合天线理论,在不改变天线原有尺寸的情况下,通过采用弯折、切槽等技术,增大了电流路径,拓宽了低频的工作带宽。天线尺寸为0.256λ_(0)×0.256λ_(0)×0.002λ_(0)(λ_(0)为最小工作频率所对应的波长),工作带宽为0.78 GHz~1.58 GHz。与初始天线相比,相对带宽从32.0%提高至67.8%。通过前后比可以看出,天线具有良好的定向性能,可以满足人脑探测活动的需求。In this paper an ultra-wideband Quasi-Yagi antenna is designed.According to the characteristic mode theory,the traditional Quasi-Yagi antenna is analyzed.Combined with the antenna theory,the current path is increased and the working bandwidth of low frequency is widened by using bending and grooving techniques without changing the original antenna size.The antenna size is 0.256λ_(0)×0.256λ_(0)×0.002λ_(0)(whereλ_(0)is the wavelength corresponding to the minimum operating frequency),and the operating bandwidth is 0.78 GHz~1.58 GHz.Compared with the initial antenna,the relative bandwidth is increased from 30.0%to 67.8%.It can be seen from the front to back ratio that the antenna has good directional performance,which can meet the needs of human brain detection activities.

关 键 词：特征模理论 超宽带 小型化 准八木天线 

分 类 号：TN823[电子电信—信息与通信工程]