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应用科学学报 ›› 2005, Vol. 23 ›› Issue (1): 37-40.

• 论文 • 上一篇    下一篇

单轴手征媒质电磁带隙结构的色散特性

郑龙根, 章文勋   

  1. 东南大学毫米波国家重点实验室, 江苏南京 210096
  • 收稿日期:2003-10-14 修回日期:2004-04-12 出版日期:2005-01-31 发布日期:2005-01-31
  • 作者简介:郑龙根(1965-),男,江苏吴县人,博士生;章文勋(1937-),男,江苏江阴人,教授,博导,E-mail:wxzhang@ieee.org
  • 基金资助:
    国家自然科学基金资助项目(60071007)

The Dispersion Characteristics of EBG Structure Consisting of Uniaxial-Chiral Medium

ZHENG Long-gen, ZHANG Wen-xun   

  1. State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
  • Received:2003-10-14 Revised:2004-04-12 Online:2005-01-31 Published:2005-01-31

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摘要： 建立了分析双各向异性媒质电磁带隙结构的平面波展开法普适模型,并对单轴手征媒质电磁带隙结构(以本构参数单轴化了的手征媒质为背景材料并按菱形晶格钻孔)进行了仿真计算.计算结果表明,在横向介电常数相同的条件下,介电常数正单轴化了的手征媒质(其他参数仍为各向同性)电磁带隙结构所具有的全向全极化带隙宽度比各向同性手征媒质的带隙宽度要宽得多.这一发现,为电磁带隙结构的工程应用提供了新的材料选择.

关键词: 双各向异性, 电磁带隙结构, 手征媒质, 色散特性, 平面波展开法

Abstract: A general model for analyzing the electromagnetic band gap (EBG) structure with bi-anisotropic medium is established by using the plane wave expansion method.An EBG structure consisting of triangular la ttice of air cylinders embeded in a uniaxial chiral medium is simulated.The results show that, when the dielectric constants in the cross section remain the same, an EBG structure with a uniaxialized chiral host (permittivity is positive uniaxial, others are isotropic) possesses a wider complete band gap than the one with an isotropic chiral host.This discovery provides an alternative option for the potential electromagnetic application of the EBG structure.

Key words: chiral medium, dispersion curve, bi-anisotropic, plane wave expansion, electromagnetic band gap

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