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类型 综合研究 预答辩日期 2017-09-17
开始(开题)日期 2016-04-21 论文结束日期 2017-06-09
地点 李文正楼6楼会议室 论文选题来源 非立项    论文字数 7.5 (万字)
题目 新型人工电磁表面的电磁调控关键技术研究
主题词 新型人工电磁表面,人工表面等离激元,轨道角动量,波束赋形,数字编码
摘要 新型人工电磁表面作为一种由亚波长单元结构按照一定规律排列而成的平面阵列,以其对电磁波优良的调控能力,成为目前信息领域的研究热点之一。本文对调控人工表面等离激元(Spoof surface plasmon polaritons, SSPPs)及空间电磁波的两类新型人工电磁表面进行了研究,主要内容和贡献概括如下: 1)研究了平面SSPPs结构参数对其色散特性的影响,设计出基于SSPPs的表面波—空间波转换器,并得到实验验证。在此基础上,结合正弦调制表面阻抗理论,提出并实现了基于SSPPs的全向漏波天线。 2)理论分析了SSPPs中的耦合模式及其对表面波传播特性的影响,提出利用并联耦合模式和串联耦合模式分别实现具有带通特性和带阻特性的SSPPs传输线,实验验证了所提出设计方法的可行性。 3)首次将SSPPs传输线作为馈电网络,利用其色散特性与频率的关系,结合圆形金属贴片的辐射特性,提出基于SSPPs的频率扫描天线,并得到实验验证。该结构克服了传统频率扫描天线在边射方向辐射性能下降的不足,进一步扩展了SSPPs的应用范围。 4)利用SSPPs作为馈电网络的优势,引入圆形贴片辐射单元在耦合能量过程中对电磁波相位的影响,首次提出基于SSPPs的涡旋波(Vortex beam)发生器。相比于常用的涡旋波产生方法,该设计在不同频率可以产生具有不同轨道角动量模式数的涡旋波,在轨道角动量模式产生方面具有更高的灵活性。仿真和实验结果均验证了理论分析的正确性。 5)通过编程,实现了软件的自动化联合仿真及优化过程,为新型人工电磁表面的单元设计和性能优化提供了极大便利。利用联合仿真,设计出超宽带反射式极化转换器,并得到实验验证。 6)提出一种透射式人工电磁表面,利用单元结构对不同极化电磁波响应不同的性质,设计出具有波束赋形功能的圆极化转换器,并得到实验验证。 7)将共口径和数字编码的概念引入新型人工电磁表面的设计中,为新型人工电磁表面的设计提供了新思路。并基于此,提出多功能数字编码新型人工电磁表面的设计方案,分别实现了多波束透射、涡旋波与普通波束独立透射以及双极化电磁波独立透射的功能。
英文题目 Key Technology of Electromagnetic Manipulation by Metasurface
英文主题词 Metasurface, spoof surface plasmon polaritons,orbital angular momentum,beamforming,coding metasurface
英文摘要 Metasurface is such a kind of planar array that composed of subwavelength unit cells arranged periodically or non-periodically, which has strong ability to control electromagnetic waves, attracting more and more attention. In this dissertation, two kinds of metasurface that manipulate spoof surface plasmon polaritons (SSPPs) and spatial waves are investigated deeply, respectively. The main researches and contributions of this dissertation are as follows: 1) According to the relationship between the dimension of the unit cell of SSPPs and its dispersion characteristic, a SSPPs-based conversion between surface wave and space wave is designed and experimentally verified. After the expansion of the unit cell, the omnidirectional leaky wave antenna is realized through the combination of the sinusoidal modulation surface impedance theory. 2) The coupling mode in SSPPs is analyzed from the speculative knowledge, as well as its impact on the transmission characteristic of surface waves. It is put forward that the parallel coupling mode and series coupling mode can be used to realize band-pass transmission line and band-stop transmission line, respectively. The feasibility of the proposed method is verified through experiment. 3) SSPPs transmission line is regarded as feed network of the antenna for the first time. Take advantage of the relationship between its dispersion characteristic and frequency, as well as the radiation feature of circular metal patch, a frequency scanning antenna based on SSPPs is designed and verified experimentally. The proposed frequency scanning antenna overcomes the shortcomings of traditional scanning antenna. The scope of application of SSPPs is expanded through this design. 4) On account of the advantages of SSPPs as feeding system, the influence to electromagnetic waves from the radiation patch unit during the energy coupling process is also introduced to design vortex beam emitter. Compared with the common method to produce vortex beam, the proposed vortex beam emitter can produce different orbital angular momentum (OAM) modes at different frequencies, providing higher flexibility in OAM mode generation. Both the simulation and experimental results prove the accuracy of the proposed theoretical analysis. 5) The automation of the co-simulation is accomplished through programming, providing great convenience to the design of unit cell of metasurface and the improvement of its performance. By using co-simulation, a reflection type polarization converter with ultra-wide bandwidth is designed and proved through experiment. 6) The response to the electromagnetic waves of a new transmission metasurface is studied. A kind of circular polarizer unit cell is designed according to the different response to two orthogonal polarizations. Combined with the use of scale of the unit cells to control radiation patterns, a circular polarizer with beamforming feature is realized finally and also verified through measurement. 7) The concept of shared-aperture and coding are introduced to the design of metasurface, offering a new idea to electromagnetic waves controlling. Several multi-functional coding metasurface is put forward based on these concepts. Transmission of multi-beam, independent transmission of vortex beam and normal beam, independent transmission of two orthogonal polarizations are achieved through this new design idea.
学术讨论
主办单位时间地点报告人报告主题
东南大学信息学院崔铁军课题组 2014.12.17 四牌楼校区李文正楼六楼会议室 尹佳媛 组会报告
东南大学信息学院崔铁军课题组 2015.06.03 四牌楼校区李文正楼六楼会议室 尹佳媛 组会报告
东南大学信息学院崔铁军课题组 2015.10.22 四牌楼校区李文正楼六楼会议室 尹佳媛 Reconfigurable Transmitarray
东南大学信息学院崔铁军课题组 2016.05.11 四牌楼校区李文正楼六楼会议室 尹佳媛 SPP and DRA
东南大学信息学院崔铁军课题组 2016.09.20 四牌楼校区李文正楼六楼会议室 尹佳媛 Optical Vortices
东南大学信息学院崔铁军课题组 2017.05.23 四牌楼校区李文正楼六楼会议室 尹佳媛 Airy Beam
东南大学信息学院崔铁军课题组 2017.04.25 四牌楼校区李文正楼六楼会议室 Qiu Cheng Wei Photonics Energy
东南大学信息学院崔铁军课题组 2017.03.21 四牌楼校区李文正楼六楼会议室 宋刚勇 五模式声学材料
     
学术会议
会议名称时间地点本人报告本人报告题目
北京大学 2016.7.24-2.16.7.27 中国国际科技会议中心
电子科技大学 2016.7.20-2017.7.22 四川岷山酒店 Frequency Selective Characteristic Based on Coupled Spoof Surface Plasmon Polaritons
The Electromagnetics Academy OFFICE 2016.8.8-2016.8.11 上海国际会议中心 Leaky Wave Antenna Based on Metallic Wire with Gradient Radial Grooves
Hong Kong University of Science and Technology 2016.1.11-2016.1.15 Hong Kong University of Science and Technology
     
代表作
论文名称
Broadband Frequency-Selective Spoof Surface Plasmon Polaritons on Ultrathin Metallic Structure
UWB Polarization-Selective Conversions of EM Waves by Metasurface under Large-Range Incident Angles
Direct Radiations of SPP Waves by Gradient Groove Depth and Flaring Metal Structure
Capacitive-coupled Series Spoof Surface Plasmon Polaritons
Endfire Radiations of Spoof Surface Plasmon Polaritons
Frequency-Controlled Broad-Angle Beam Scanning of Patch Array Fed by Spoof Surface Plasmon Polariton
A circular polarizer with beamforming feature based on frequency selective surfaces
Frequency selective characteristic based on coupled spoof surface plasmon polaritons
 
答辩委员会组成信息
姓名职称导师类别工作单位是否主席备注
冯一军 正高 教授 博导 南京大学
金飚兵 正高 教授 博导 南京大学
赵永久 正高 教授 博导 南京航空航天大学
车文荃 正高 教授 博导 南京理工大学
程强 正高 教授 博导 东南大学
蒋卫祥 正高 教授 博导 东南大学
马慧锋 正高 教授 博导 东南大学
      
答辩秘书信息
姓名职称工作单位备注
汤文轩 副高 副教授 东南大学