基于可重构超材料的太赫兹可调带阻滤波器

发布时间：2018-01-03 12:29

本文关键词：基于可重构超材料的太赫兹可调带阻滤波器　出处：《激光与红外》2017年08期 　论文类型：期刊论文

【摘要】：设计了一种基于可重构超材料的太赫兹三带可调带阻滤波器。该滤波器各单元均由可动部分与固定部分构成,两部分均采用金-硅两层结构,表层金的厚度为0.65μm,下层硅的厚度为25μm。可移动部分由电热驱动器进行驱动,最大位移为5μm。可动部分为两边长不同的矩形环,固定部分为开口环。用时域有限积分方法研究了滤波特性和频率可调机理,并根据表面电流分布情况,建立了等效电路。由表面电流分布可知,前两个阻带中心频率分别由固定部分的低频偶极子和高频偶极子振荡产生,第三个阻带中心频率由可动部分表面的偶极子振荡产生。该可调带阻滤波器在太赫兹通信和频率选择性太赫兹探测领域有重要应用价值。
[Abstract]:A terahertz three-band tunable band-stop filter based on reconfigurable supermaterial is designed. Each unit of the filter is composed of movable part and fixed part, both of which are gold-silicon two-layer structure. The thickness of the surface gold is 0.65 渭 m, the thickness of the lower silicon is 25 渭 m. The movable part is driven by an electrothermal driver, and the maximum displacement is 5 渭 m. The movable part is a rectangular ring with different lengths on both sides. The fixed part is an open loop. The filtering characteristics and the frequency adjustable mechanism are studied by using the time-domain finite integral method, and the equivalent circuit is established according to the distribution of the surface current, which can be seen from the surface current distribution. The first two stopband center frequencies are generated by the low frequency dipole oscillation and the high frequency dipole oscillation of the fixed part, respectively. The third stopband center frequency is generated by dipole oscillation on the movable part of the surface. The tunable band-stop filter has important application value in terahertz communication and frequency selective terahertz detection.
【作者单位】：桂林电子科技大学电子工程与自动化学院;广西信息科学实验中心;
【基金】：国家自然科学基金项目(No.61265005,No.11574059) 广西自然科学基金项目(No.2015GXNSFDA19039,No.2014GXNSFAA118376)资助
【分类号】：TN713
【正文快照】： 1引言太赫兹波,通常定义为0.1~10 THz范围内的电磁波[|],它具有许多特性,如穿透性强、安全性好和进行物质识别的指纹谱等,因此,在安检、生物医学和物质鉴别等领域有重要的应用前景。超材料是指由具有特殊电磁特性的复合材料或结构H,一般由亚波长尺寸的周期性阵列组成。超材料

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