Antennas and EM Field Manipulation from Various Transformation Techniques
讲座名称 | Antennas and EM Field Manipulation from Various Transformation Techniques |
讲座时间 | 2019-08-22 10:00:00 |
讲座地点 | 西安电子科技大学北校区主楼3区201学术报告厅 |
讲座人 | Yang Hao |
讲座人介绍 | ![]() |
讲座内容 |
Effectively manipulating electromagnetic (EM) waves plays an important role in many modern technological innovations ranging from Marconi's first transatlantic wireless transmission through Sir Henry Tizard's radar to modern cellular communications. Now enabled with two recent developments - transformations optics and the design and fabrication of novel electromagnetic materials, antenna engineers have been equipped with new design tools which provide entirely fresh solutions to classical problems restricted by fundamental physics, and enable new ways to manipulate the radiation, propagation and absorption of EM waves.
This talk presents a review of some current work conducted at Queen Mary University of London, related to metamaterials and nanomaterials such as graphene for RF/Microwave and THz applications. I will start with the introduction of Transformation Optics, a new paradigm for EM design, providing equivalent material properties through a well-chosen change of coordinates, in order to achieve unprecedented wave manipulation. This is essential for the development of conformal antennas or flat panel antennas for both SATCOM and aerospace applications. Along the way, design challenges of new functional materials, especially, understanding the role of ordered and disordered particles in a host media will be discussed as they are scientifically and technologically important in order to achieve superior spectral and angular properties. An efficient numerical technique, which is capable of modelling more than 20,000 plasmonic nanoparticles, will be introduced. Furthermore, I will present the theory of hyperuniformity and some intriguing applications in the design of materials with randomly dispersed particles. I will demonstrate that a Luneburg lens based on the proposed hyperuniform media has superior radiation properties and it will open up a new avenue in electromagnetic materials-by-design.
Finally, with the advent of nanotechnologies, the possibility to explore the interactions of microwaves with much smaller objects (micrometres to nanometres) is emerging as an exciting field of research and technology development. In this talk, recent development of nanomicrowave devices such as the near field microwave spectroscopy, and graphene components will be presented together with simulation and measurement results.
电子工程学院 天线与微波技术国家重点实验室 毫米波与太赫兹技术重点实验室
国际合作与交流处 IEEE AP/MTT Xi’an Chapter
|
转载请注明出处:西安电子科技大学学术信息网
如果您有学术信息或学术动态,欢迎投稿。我们将在第一时间确认并收录,投稿邮箱: meeting@xidian.edu.cn
如果您有学术信息或学术动态,欢迎投稿。我们将在第一时间确认并收录,投稿邮箱: meeting@xidian.edu.cn