一种蝶形单元的电磁带隙结构的频率特性  

Frequency characteristics of electromagnetic bandgap structure with bow-tie unit

作　　者：田雨波[1] 沙莎[1] 

机构地区：[1]江苏科技大学电子信息学院,江苏镇江212003

出　　处：《电波科学学报》2009年第5期865-868,878,共5页Chinese Journal of Radio Science

基　　金：江苏省高校"青蓝工程"优秀青年骨干教师项目资助;江苏省高校自然科学基础研究项目(项目编号:07KJB510032);江苏科技大学优秀青年骨干教师项目资助

摘　　要：电磁带隙结构是光子晶体中的一种,它可以广泛地应用于微波、毫米波波段。研究了一种具有蝶形单元的电磁带隙结构,通过理论分析获得它的ABCD矩阵,将ABCD矩阵转换为散射矩阵,进而得到该结构的频率特性。在这种电磁带隙结构中引入缺陷,采用同样的分析方法获得它的频率特性。通过仿真计算可以看出,具有蝶形单元的电磁带隙结构大约有2.8 GHz带宽的阻带,相对带宽为52%;而具有缺陷的电磁带隙结构在阻带中形成一个具有一定带宽的通带,且通带的频率很容易调整。Electromagnetic bandgap（EBG）structure, which can be widely used in microwave and millimeter-wave fields, is a kind of photonic crystal. An EBG structure with bow-tie unit was researched in this paper. Based on theory analysis, the ABCD matrix is gotten and transferred into scatter matrix,which means its frequen- cy characteristics are obtained. A defect is introduced into the EBG structure. Furthermore, the same method is adopted to compute its frequency characteristics. The simulation results show that the EBG structure with bow-tie unit has a stopband with 2.8 GHz bandwidth,and its relative bandwidth is about 52~. The EBG struc- ture with defect forms a passband with a certain bandwidth in the stopband, and the center frequency of passband can be adjusted easily.

关 键 词：电磁带隙 频率特性 散射矩阵 

分 类 号：TN820[电子电信—信息与通信工程]