微带型人工表面等离子体激元的理论和应用研究

发布时间：2018-05-14 08:13

本文选题：人工表面等离子体激元 + 微带线　；参考：《中国科学技术大学》2016年博士论文

【摘要】：表面等离子体激元(Surface Plasmon Polariton, SPP)是一种沿着导体和介质交界面传输、沿界面垂直方向上快速衰减的电磁波,它在光学领域具有广泛的研究和应用。而人工表面等离子体激元(Spoof SPP, SSPP)是一种拥有和SPP类似的色散曲线、在金属周期表面结构上传输的表面电磁波,近年来已经在微波或太赫兹等频段得到实验验证。在微波频段,人工表面等离子体激元结构和传统微波传输线有很大不同,它拥有独特的色散曲线特性和场分布特性。SSPP结构主要有两大类,一类是三维SSPP,这种结构的SSPP加工复杂而又困难,而且,不宜与二维平面微波电路连接：另一类是二维平面SSPP,但现有的二维平面SSPP是单导体形式的,和常用的双导体形式的微波传输线对接困难,因此,需要研究双导体形式的二维平面SSPP,以实现两者的无缝对接,本论文针对微带型SSPP的理论和应用开展研究,满足了这方面的研究需要,具有重要的理论意义和应用价值。论文的主要研究工作和创新之处如下：1、在对人工表面等离子体激元(SSPP)的特性和研究状况进行分析和调研的基础上,结合人工表面等离子体激元和传统微波传输结构的特点,提出了一种适用于微波频段的新型SSPP结构,即微带型人工表面等离子体激元结构。首先,分析了新型结构的色散特性,探索了不同尺寸对色散曲线的影响：其次,通过网络分析,计算新型结构的损耗特性;然后,基于阻抗匹配即是波矢匹配的原理,提出了实现微带型SSPP结构和常用微波传输线之间连接的模式转换装置；最后,制作和测试了新型结构,实验验证了新型结构的有效性,在截止频率以内,传输损耗低于0.5dB。2、针对新型结构,从“路”的角度出发,建立了微带型人工表面等离子体激元结构的可缩放等效电路模型,提出了一套对微带型SSPP结构进行建模和参数提取的方法,色散曲线吻合度良好。3、根据微带型人工表面等离子体激元结构具有将场束缚在金属表面的特性.重点研究了新型SSPP结构在信号完整性问题上的应用。结果表明,耦合微带型SSPP结构和差分耦合微带型SSPP结构具有显著降低串扰的能力,为解决串扰问题,提供了一种新的途径。4、根据新型结构的特点,研究了微带型人工表面等离子体激元结构在微波有源元器件上的应用。利用微带型SSPP结构,设计和制作了一种新型的开关键控(OOK)调制器,实验结果验证了设计的有效性。
[Abstract]:Surface plasmon Plasmon Polariton, SPP) is a kind of electromagnetic wave which propagates along the interface between conductor and medium and attenuates perpendicularly along the interface. It has been widely studied and applied in the field of optics. The artificial surface plasmon excitation (SSPP) is a kind of dispersion curve similar to that of SPP. The surface electromagnetic waves propagating on the metal periodic surface structure have been experimentally verified in recent years in the microwave or terahertz frequency bands. In microwave frequency band, the plasmon structure of artificial surface plasma is very different from that of traditional microwave transmission line, and it has unique dispersion curve characteristic and field distribution characteristic. There are two main types of SPP structure. One is three-dimensional SSPP, which is complicated and difficult to process, and it is not suitable to connect with two-dimensional planar microwave circuit. The other is two-dimensional planar SSPP, but the existing two-dimensional planar SSPP is single-conductor. It is difficult to connect with microwave transmission lines in common double conductor form. Therefore, it is necessary to study two dimensional planar SSPPs with double conductors in order to realize the seamless docking between them. In this paper, the theory and application of microstrip SSPP are studied. It meets the needs of this field of research and has important theoretical significance and application value. The main research work and innovation of this paper are as follows: 1. Based on the analysis and investigation of the characteristics and research status of artificial surface plasmon excitation (SSPP), combining the characteristics of artificial surface plasma excitation and traditional microwave transmission structure, A new type of SSPP structure suitable for microwave frequency is proposed, that is, microstrip artificial surface plasmon structure. Firstly, the dispersion characteristic of the new structure is analyzed, and the influence of different dimensions on the dispersion curve is explored. Secondly, the loss characteristic of the new structure is calculated by network analysis, and then, based on the principle of impedance matching, which is the wave vector matching, A mode conversion device to realize the connection between microstrip SSPP structure and microwave transmission line is proposed. Finally, the new structure is fabricated and tested, and the validity of the new structure is verified by experiments, within the cutoff frequency. The transmission loss is less than 0.5 dB.2.The scalable equivalent circuit model of the microstrip artificial surface plasma exciton structure is established from the view of "path" for the new structure. A method for modeling and parameter extraction of microstrip type SSPP structure is presented. The dispersion curve is in good agreement. The plasmon structure of microstrip type artificial surface plasma has the characteristic of binding the field to the metal surface. The application of a new SSPP structure to signal integrity is studied in detail. The results show that the coupled microstrip SSPP structure and the differential coupled microstrip SSPP structure have the ability to reduce crosstalk significantly, and a new way to solve the crosstalk problem is provided, according to the characteristics of the new structure. The application of microstrip artificial surface plasmon structure in microwave active components is studied. A novel open-key-control Ook modulator is designed and fabricated using a microstrip SSPP structure. The experimental results show that the design is effective.
【学位授予单位】：中国科学技术大学
【学位级别】：博士
【学位授予年份】：2016
【分类号】：O441.4

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