二维介质PBG结构色散特性的时域有限差分法分析  

An Analysis of Dispersion Characteristics in 2-D Dielectric PBG Structure by Using FDTD Method

作　　者：包秀龙[1] 章文勋[1] 郑龙根[1] 李乐伟[2] 

机构地区：[1]东南大学毫米波国家重点实验室,江苏南京210096 [2]新加坡国立大学电子工程与计算机科学系

出　　处：《应用科学学报》2003年第3期236-240,共5页Journal of Applied Sciences

基　　金：国家自然科学基金(60071007);中国-新加坡合作研究(2001.62)资助项目

摘　　要：采用时域有限差分法分析二维介质柱PBG结构的色散特性.计算表明,在介质填充比相同的条件下含单介质柱周期的PBG结构,其介质柱形状对色散特性的影响很小;而含多介质柱周期的PBG结构,TM波的阻带中心频率随介质柱个数的增多而提高,阻带绝对宽度增大,相对宽度相当.In this paper, the dispersion characteristics in 2-D dielectric PBG structure are analyzed by using FDTD method. The computed κ-ω curves show that under the same ratio of dielectric occupancy in the period cell and in the case of a single dielectric cylinder only, the dispersion curves are not sensitive to the geometry of this cylinder. However, in the case of multiple separat-ed cylinders, the central frequency of TM band-gap rises with the increased number of cylinders, and its relative bandwidth is almost constant.

关 键 词：二维介质柱 PBG结构 光子带隙结构 色散特性 时域有限差分法 带阻频响特性 电磁波 

分 类 号：TN011[电子电信—物理电子学]