一种基于DGS的分形微带天线的设计  

The design of a fractal patch antenna based on DGS

作　　者：苏雪娟[1] 吴先良[1,2] 李运志[1] 

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,安徽合肥230039 [2]安徽大学电子科学与技术学院,安徽合肥230039

出　　处：《安徽大学学报（自然科学版）》2009年第4期45-47,共3页Journal of Anhui University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(69971001);安徽省教育厅重点基金资助项目(KJ2007A081)

摘　　要：将地面缺陷结构（DGS）引入微带天线的设计中，原本分形微带天线在5～20GHz频带范围内有4个谐振频率点．由于DGS缺陷结构可以有效抑制天线的高次模，该新型结构在5—20GHz频带范围内得到了两个谐振频率点，并使得天线的增益在引入DGS结构后提高了大约2dB．The fractal antenna having the novel dual-band defected ground structure in the ground has been demonstrated. Between 5 GHz and 20 GHz, the resonant frequency had reduced to two after introducing DGS. The effectiveness of the DGS structure was discussed for the suppression of the higher order modes of the antenna. We could receive two resonant frequencies by the new structure, and the radiation patterns at the harmonic frequencies could he drastically improved 2 dB compared with the normal fraetal antenna without the DGS structure.

关 键 词：DGS结构 带宽扩展 微带天线 

分 类 号：O441[理学—电磁学]