Broadband microwave Luneburg lens made of gradient index metamaterials |
| |
Authors: | Loo Yoke Leng Yang Yarong Wang Ning Ma Yun Gui Ong Chong Kim |
| |
Affiliation: | Centre for Superconducting and Magnetic Materials, Department of Physics, National University of Singapore, Singapore. yuling.loo@gmail.com |
| |
Abstract: | Luneburg lenses are able to form perfect focus that is free of aberration. Because of the varying refractive index throughout the lens, incoming electromagnetic waves can travel in a curved path and be guided to focus at the back of the lens. The implementation of Luneburg lenses is often difficult due to the challenges in creating a medium with varying refractive index using normal materials. This problem can be overcome with the use of gradient index metamaterials. We report a two dimensional Luneburg lens made of gradient index metamaterials. It consists of 17 concentric shells with etched patterns on a printed circuit board working in microwave X band frequency. The broad properties of the Luneburg lens are then discussed. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|