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- A two-dimensional photonic crystal formed by a triangular lattice of square dielectric rods with a large absolute band gap 大带隙二维正方介质柱三角晶格光子晶体
- Keywords 2-D photonic crystals;the finite-difference time-domain method;transmission characteristics;square dielectric rods;bandgap; 关键词二维光子晶体;时域有限差分法;传输系数;正方介质柱;带隙;
- square dielectric rods 正方介质柱
- We use band-structure viewpoint to examine the formed PBG in the corner-cutting structure.The reason why the complete PBG of octagonal dielectric rods with square lattice is closed can be understand. 在切边结构的计算上,则是利用能带的观念去探讨能隙形成的决定因素,进而瞭解八边形柱子无法在正方晶格中出现绝对光子能隙的原因。
- The expression of normalized pattern function of dielectric rod radiator is given. 本文给出了介质天线归一化方向图函数的表达式;
- Two models of 2D photonic crystal of line defects and nonperiodic dielectric rods are established.The finite-difference-time-domain method is developed for the study of bandgap. 构建了介质柱间距变化的变周期结构以及介质柱半径线缺陷两种二维光子晶体模型,并将时域有限差分法用于其能带特性研究。
- A new millimeter-wave omnidirectional dielectric rod metallic grating antenna is developed successfully. 研制成功了一种新型金属栅加载毫米波全向天线。
- Characteristics of omni-directional dielectric rod grating leaky antennas with arbitrary profiles are investigated by an improved perturbation method. 摘要用改进微扰法分析了任意曲线形状圆柱形介质栅全向天线的辐射特性。
- When the permittivities of dielectric rods increase, the number of regular modes decrease.Further more, there is no fundamental mode which is important for using high order mode only. 若增大介质杆介电常数,则出现的规则模式减少,并且没有基模出现,同一个模式,频率明显降低;
- I hit him fair and square on the jaw. 我不偏不倚打中他的下巴。
- composite dielectric rod antenna 复合介质棒天线
- A unit of area equal to a square rod. 平方杆等于一平方杆的面积单位
- The concrete walls are reinforced with steel rods. 混凝土墙是用钢筋加固的。
- The crowds in the square were elated by the news. 这消息使广场上的人群欢欣鼓舞。
- Can I leave you to square up with the waiter? 我把跟服务员结帐的事交给你办行吗?
- The two teams were all square at the end. 最后两队以积分相同而结束。
- The little girl drew a square on the paper. 小女孩在纸上画了一个正方形。
- The teams are all square at one match each. 这些队在各自参加了一场比赛后不分胜负。
- Crowds thronged the main square of the city. 城里的大广场上挤满了人群。
- Eight roads radiate from the square. 八条大道从广场呈辐射形伸展出去。