红外技术, 2017, 39 (2): 189, 网络出版: 2017-03-29  

太赫兹波段 Y型环六边形滤波器的设计与分析

Design and Analysis of Y-typed Hexagonal Ring Filter in THz Region
作者单位
重庆邮电大学光电工程学院, 重庆 400065
摘要
参考传统的频率选择表面 Y型中心连接型单元, 提出一种多层结构的 Y型环六边形阵列频率选择表面带通滤波器。设计了工作在太赫兹大气通信窗口的滤波器, 研究了金属层数对 3 dB带宽的影响, 三层级联滤波器中心频率为 338 GHz, 3 dB带宽为 75.82 GHz, 带内最大插入损耗为 0.48 dB。同时讨论了三层滤波器的极化方式和入射角, 且该三层带通滤波器对入射波的极化方式不敏感, 且在 30°范围内的频率响应稳定, 可适用于太赫兹大气通信、成像等领域中。
Abstract
Based on the traditional Y-shaped center linked element, a multilayer structure of Y-typed hexagonal array bandpass filter for the frequency selective surface(FSS) is presented in this paper. A bandpass filter whose bandpass characters applied in the terahertz communication window is designed. The effect of metal layers on the bandwidth of 3 dB is studied, and the center frequency of the third layer filter is 0.338 THz with a 3 dB bandwidth of 75.82 GHz. The maximum insertion loss in pass band reaches 0.48 dB. Meanwhile, the polarization mode and incident angle of the three layer filters are discussed. The results show that the frequency response characteristics of the FSS have little sensitivity to the polarization pattern, and that highly stable frequency response characteristics can be obtained at all incident angles smaller than 30°. It can work in THz atmospheric communication and imaging systems.

潘武, 张俊, 余璇, 曾威. 太赫兹波段 Y型环六边形滤波器的设计与分析[J]. 红外技术, 2017, 39(2): 189. PAN Wu, ZHANG Jun, YU Xuan, ZENG Wei. Design and Analysis of Y-typed Hexagonal Ring Filter in THz Region[J]. Infrared Technology, 2017, 39(2): 189.

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