基于缝隙单元的3D多模频率选择结构研究  

3D Multi-mode Frequency Selective Structure Based on Slot Line Unit Cells

作　　者：李波[1] 章一雄 张万平 汤一铭 薄亚明[1] 

机构地区：[1]南京邮电大学射频集成与微组装技术国家地方联合工程实验室,南京210023

出　　处：《微波学报》2018年第1期52-54,59,共4页Journal of Microwaves

基　　金：国家自然科学基金(61401230);南京邮电大学引进人才科研启动项目(NY214148);南京邮电大学1311人才计划

摘　　要：为了实现高性能的滤波响应,提出了一类新型基于缝隙单元的三维多模频率选择结构。首先以传统2D“十字”缝隙型频率选择表面及其级联结构为例,阐述了2D频率选择表面在结构、性能上的优缺点。为了进一步改善滤波性能,分别提出了基于均匀缝隙单元、阶梯阻抗缝隙单元、多模吸波式缝隙单元的3D频率选择结构。该类型频率选择结构可基于传输线理论进行分析,在设计频段内可产生多个谐振模式而展现出高性能滤波响应,故在微波毫米波频段具有良好的应用前景。In this paper, a novel kind of frequency selective structure using slot line unit cells is presented to exhibit filtering response of high performance. Two examples of traditional frequency-selective surfaces, consisting of a 2D periodical array of crossed-slots （cascaded crossed-slots） , are briefly reviewed with a focus on understanding their operating principles and identifying their advantages and limitations. In order to improve the filtering performance, we propose a new kind of 3D frequency selective structures with uniform slot-line unit cells, stepped-impedance slot-line unit cells, and multi-mode ab- sorptive slot-line unit cells respectively. These frequency selective structures can be analyzed by transmission-line theory, and can be obtain the desirable resonances in the designed frequencies. The proposed frequency selective structures have good applications in microwave and millimeter-wave frequencies.

关 键 词：频率选择表面 周期结构 缝隙单元 

分 类 号：TN713[电子电信—电路与系统]