基于超强透射现象的高增益金属缝隙天线设计

发布时间：2019-03-07 14:26

【摘要】：自1998年Ebbesen等人发现光的超强透射现象以来,对该现象的机理及应用研究成为光领域的热点。由于超强透射现象在光学设备领域取得了显著成果,因此对微波器件方面的应用研究,也引起了越来越多学者关注。随着研究的深入,在微波波段天线、滤波器等微波器件也有相应技术突破。本文将超强透射现象应用到天线的设计中,有效地提高了天线的增益及性能。本文主要工作如下:1.对超强透射现象的表面等离子体激元理论、谐振腔理论、复合衍射衰逝波理论进行了分析,阐述了该现象发生的机理。2.将等效电路法应用于周期性金属狭缝结构分析,结合电磁场基本理论计算了反射系数、传输系数,分析了透射特性。将等效电路法的分析结果与基于有限元法的HFSS软件的结果进行对比,二者吻合较好,从而表明了该方法的有效性。3.将超强透射现象应用到天线设计中,并结合等效电路模型设计了一款高增益缝隙天线。通过在铝板刻蚀对称凹槽并增加金属边墙,有效地改善了天线的性能。分析及测试结果表明:天线覆盖10.88GHz-11.06GHz、11.48GHz-11.68GHz、14.60GHz-14.90GHz 和 15.38GHz-15.87GHz 四个频段,最大增益达到 22dB。
[Abstract]:Since the super strong transmission of light was discovered by Ebbesen et al in 1998, the research on the mechanism and application of this phenomenon has become a hot spot in the field of light. Because the super-strong transmission phenomenon has made remarkable achievements in the field of optical equipment, more and more scholars pay attention to the application of microwave devices. With the deepening of the research, microwave devices such as microwave band antennas, filters and other microwave devices have also made technological breakthroughs. In this paper, the super-strong transmission phenomenon is applied to the antenna design, and the gain and performance of the antenna are improved effectively. The main work of this paper is as follows: 1. The surface plasmon theory, resonant cavity theory and complex diffraction decay wave theory of super strong transmission phenomenon are analyzed, and the mechanism of the phenomenon is expounded. 2. The equivalent circuit method is applied to the structure analysis of periodic metal slit. The reflection coefficient and transmission coefficient are calculated with the basic theory of electromagnetic field, and the transmission characteristics are analyzed. The analysis results of the equivalent circuit method are compared with those of the HFSS software based on the finite element method, and the results are in good agreement with each other, which shows the effectiveness of the method. 3. The super strong transmission phenomenon is applied to antenna design, and a high gain slot antenna is designed based on the equivalent circuit model. The performance of the antenna is effectively improved by etching symmetric grooves on aluminum plates and adding metal side walls. The analysis and test results show that the antenna covers 10.88GHz / 11.06GHz, 11.48GHz / 11.68GHz, 14.60GHz / 14.90GHz and 15.38GHz-15.87GHz, and the maximum gain is 22dB.
【学位授予单位】：安徽大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN823.24

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