Ultrabroadband Three-Dimensional Printed Radial Perfectly Symmetric Gradient Honeycomb All-Dielectric Dual-Directional Lightweight Planar Luneburg LensClick to copy article linkArticle link copied!
- Jin ChenJin ChenBeijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing 100081, ChinaMore by Jin Chen
- Xujin Yuan*Xujin Yuan*E-mail: [email protected] (X.Y.).Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing 100081, ChinaMore by Xujin Yuan
- Mingji ChenMingji ChenBeijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People’s Republic of ChinaMore by Mingji Chen
- Xiaodong ChengXiaodong ChengBeijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing 100081, ChinaMore by Xiaodong Cheng
- Anxue ZhangAnxue ZhangSchool of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaMore by Anxue Zhang
- Gantao PengGantao PengSchool of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, ChinaMore by Gantao Peng
- Wei-Li Song*Wei-Li Song*E-mail: [email protected] (W.-L.S.).Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing 100081, ChinaState Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, People’s Republic of ChinaMore by Wei-Li Song
- Daining FangDaining FangBeijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures, Institute of Advanced Structure Technology, Beijing 100081, ChinaMore by Daining Fang
Abstract
An ultrabroadband all-dielectric planar Luneburg lens has been designed and fabricated in this study, which is in the form of a radial gradient lightweight honeycomb column. Because of the novel design of a radial symmetric honeycomb-like microstructure in the subwavelength dimension and the radial gradient configuration according to the refractive index distribution of Luneburg lens, the present lens can focus incident plane waves on the opposite side with high convergence, and its operating frequency range is rather broadband, spanning from 6 to 16 GHz. Besides, the all-dielectric honeycomb-like lens is lightweight with a mass density of 0.23 g/cm3, and its broadband transmittance is higher than the reported cases consisting of metallic metamaterial or gradient photonic crystal structures. A prototype of the lens is fabricated by using 3D printing techniques, on which the electric near-field distribution and far-field radiation pattern measurements have been carried out, and the aforementioned performances were demonstrated experimentally. It was also observed that for two point sources placed at the edge of the lens whose intersection angle with the center of the lens is 90°, the far-field radiation pattern was still kept highly directional, which means that the lens can generate two highly directional beams simultaneously, and is an efficient double input-double output device.
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- Jin Chen, Mingji Chen, Daining Fang. Broad Terahertz Radial Perfectly Symmetric Gradient Honeycomb All-Dielectric Planar Luneburg Lens. 2019, X-083-X-085. https://doi.org/10.1109/MetaMaterials.2019.8900839
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