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|Title:||Broadband microwave Luneburg lens made of gradient index metamaterials|
|Citation:||Loo, Y.L., Yang, Y., Wang, N., Ma, Y.G., Ong, C.K. (2012-04). Broadband microwave Luneburg lens made of gradient index metamaterials. Journal of the Optical Society of America A: Optics and Image Science, and Vision 29 (4) : 426-430. ScholarBank@NUS Repository. https://doi.org/10.1364/JOSAA.29.000426|
|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. © 2012 Optical Society of America.|
|Source Title:||Journal of the Optical Society of America A: Optics and Image Science, and Vision|
|Appears in Collections:||Staff Publications|
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