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
  
DOI:
中文关键词:  频率选择表面, 周期结构, 缝隙单元
英文关键词:frequency selective surface,periodic structure,slot-line unit cell
基金项目: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
作者单位
李 波,章一雄,张万平,汤一铭,薄亚明 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 
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中文摘要:
      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。
英文摘要:
      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 absorptive 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.
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