The Design of the Generalized Luneburg Lens
碩士 === 國立交通大學 === 電信工程研究所 === 105 === This thesis, concerns the analysis and applications of periodic structure in the generalized Luneburg lens. The periodic structure in the shape of square patch we use is a kind of metasurface. The metasurface is easy to manufacture and compact that is suitable f...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | en_US |
| Published: |
2016
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/5y7vje |
| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 105 === This thesis, concerns the analysis and applications of periodic structure in the generalized Luneburg lens. The periodic structure in the shape of square patch we use is a kind of metasurface. The metasurface is easy to manufacture and compact that is suitable for the synthesis of Luneburg lens. Thus, it makes the SPPs propagate on the surface and has the performance we expect.
We propose using the dispersion diagram of the unit cell and then retrieve the corresponding refractive index in the specific frequency. This is the key point for the synthesis of the gradient lens.
Finally, we propose several methods that can improve the performance of the gradient lens including increasing the samples when we discretize the diagram of the refractive index, changing the interface of the generalized Luneburg lens that can enhance the power in the specific location and using the complete 2D dispersion diagram to analyze the variation of the refractive index when the unit cell is in the different location. Theses method construct the basement for the improving the performance and the efficiency of the lens.
|
|---|