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Research of the terahertz dual-band notch filter based on FSS structures

ISSN号：1001-6538
期刊名称：Chinese Science Bulletin
时间：2013.12
页码：4687-4691
分类：TN713[电子电信—电路与系统] O441.4[理学—电磁学;理学—物理]
作者机构：[1]School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China, [2]School of Physics, Capital Normal University, Beijing 100089, China
相关基金：supported by the National Natural Science Foundation of China(61171051,50971094 and 61072136)
相关项目：太赫兹辐射源设计和波谱整形技术研究

作者： Zhang JinLing|Zhang Yu|Gao Ke|Zhao GuoZhong|

关键词：陷波滤波器, 太赫兹波, T形结构, 双频段, FSS, 太赫兹时域光谱, 频率选择表面, 谐振频率, terahertz filter, terahertz time-domain spectroscopy, FSS structure, finite-integral time-domain, notch filter

中文摘要：

在这篇论文，为二层的频率的一个双乐队的槽口过滤器在兆兆赫(THz ) 的选择表面(FSS ) 有高过滤性能的频率在高抵抗力的硅底层上被认识到。与在硅晶片上有图案的周期的金属性的共鸣器，设计过滤器能为兆兆赫申请提供二悦耳的反响的频率。传播反应被在Ｔ形结构附近介绍一个额外的包围模式改进，并且传播落下的地点与几何参数独立地被调节。由有限积分的时间域方法模仿了，过滤器被设计与双乐队的乐队站性能在 0.2 和 0.6 THz 之间操作，这个图案的一个突出的特征正在做它对事件角度的频率反应的低敏感，它允许把过滤器结束交给到放射来源球形的波浪前面。建议结构用影印石版术被制作并且由 THz 时间域光谱学系统测试了。试验性的结果证明传播反应分别地在 285 和 460 GHz 附近有超过 12 和 32 dB 拒绝，它在对模拟结果的好同意。

英文摘要：

In this paper, a dual-band notch filter for two-layer frequency selective surface （FSS） at terahertz （THz） frequency with high fil- tering performance has been realized on high-resistivity silicon substrates. With periodic metallic resonators patterned on the sili- con wafer, the designed filter can provide two tunable resonant frequencies for terahertz application. The transmission response was improved by introducing an extra surrounding pattern around the T-shaped structure, and the location of transmission drop was tuned independently with geometric parameters. Simulated by finite-integral time-domain method, the filter is designed to operate between 0.2 and 0.6 THz with dual-band band-stop performance, a salient feature of this design is making the low sensi- tivity of its frequency response to the incident angles, which allows to place the filter close to the radiation source with spherical wave fronts. The proposed structures were fabricated using photolithography and tested by THz time-domain spectroscopy system Experimental results show that the transmission response has more than 12 and 32 dB rejections near 285 and 460 GHz respectively, which is in good agreement with the simulation result.

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