摘要
为了提高微波光子晶体尺寸的紧凑性,根据其带隙结构的局域谐振原理和等效电路分析模型,对传统的UCEBG结构进行了改进,提出了一种新型EBG结构。该结构通过引入弯曲折线延长了电流长度,增大了等效电感效应,同时采用了更长的边缘耦合,延长了等效磁流,增强了等效电容效应。实验结果表明,新结构能够产生频率带隙,其带隙中心频率比传统的UCEBG结构低36.5%,且相对带宽保持不变,达到了实现紧凑UC-EBG结构的目的。
Focusing on the problem that the conventional EBG structure isn＇t compact enough,a novel uniplanar electromagnetic band gap （UCEBG） structure is presented here,based on the physical mechanism of EBG structures and equivalent circuit model. Incorporated with the meandered strips and the long gaps of edge, this structure significantly enlarges the equivalent capacitance between neighboring elements, as well as increases the equivalent inductance. So, it becomes even more compact in size. An experiment has been carried out to verify the validity of the proposed EBG structure. The measured results show that the obvious stop band is observed, and its center band gap frequency depresses over 36.5% than that of the conventional UC -EBG in the same period of the lattice with the constant relative bandwidth. The objective of realizing compact UC - EBG structure is attained.
出处
《激光与红外》
CAS
CSCD
北大核心
2008年第9期910-912,920,共4页
Laser & Infrared
基金
国家自然科学基金(No.60671001)
陕西省自然科学基础研究计划(No.2005F21)
西安市工业攻关基金(No.GG06020)资助项目
关键词
微波光子晶体
电磁带隙
周期结构
紧凑
表面波
microwave photonic crystals
electromagnetic band gap （EBG）
periodic structures
compact
surface wave
