Broadband and wide-angle plane focal surface Luneburg lens
Jue Li(李珏)1,2, Yangyang Zhou(周杨阳)1,2,†, and Huanyang Chen(陈焕阳)1,2,‡
1 Institute of Electromagnetics and Acoustics and Department of Physics, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China; 2 Fujian Engineering Research Center for EDA, Fujian Provincial Key Laboratory of Electromagnetic Wave Science and Detection Technology, Xiamen Key Laboratory of Multiphysics Electronic Information, Xiamen University, Xiamen 361005, China
Abstract The energy crisis has aroused widespread concern, and the reform of energy structure is imminent. In the future, the energy structure will be dominated by the solar energy and other renewable energy sources. The solar concentrating technology as a promising method has been widely studied for collecting solar energy. However, the previous solar concentrating technologies suffer from some drawbacks, such as low focusing efficiency and large concentrating size. The Luneburg lens with highly efficient aberration-free focusing provides a new route for solar/energy concentrator. In this work, we designed a plane focal surface Luneburg lens (PFSLL) by transformation optics (TO). The PFSLL provides a relatively high focusing efficiency and concentration ratio of collection of energy. At the same time, it circumvents the disadvantage of curve surface of the classical Luneburg lens in device integration. Based on the reciprocity of electromagnetic waves, the PFSLL can also be applied to the antenna field to achieve broadband wide-angle scanning and highly directional radiation.
Received: 24 April 2022
Revised: 04 August 2022
Accepted manuscript online: 02 September 2022
PACS:
42.25.-p
(Wave optics)
Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2020YFA0710100), the National Natural Science Foundation of China (Grant Nos. 92050102 and 11874311), the Shenzhen Science and Technology Program (Grant No. JCYJ20210324121610028), and the Fundamental Research Funds for the Central Universities (Grant Nos. 20720220033 and 20720200074).
Jue Li(李珏), Yangyang Zhou(周杨阳), and Huanyang Chen(陈焕阳) Broadband and wide-angle plane focal surface Luneburg lens 2023 Chin. Phys. B 32 064210
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