Results 1 to 10 of about 503,018 (197)
Modified Luneburg Lens Based on Metamaterials [PDF]
International Journal of Antennas and Propagation, 2015 We present the design, fabrication, and experimental characterization of a modified two-dimensional Luneburg lens based on bulk metamaterials. The lens is composed by a number of concentric layers.
Haibing Chen +8 more
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Stepwise Luneburg Lens for Bloch Surface Waves
Applied Sciences, 2018 In order to enlarge the capability for in-plane manipulation of the Bloch surface wave (BSW), we investigate 2D gradient index (GRIN) optical components using a finite-difference time-domain (FDTD) numerical method. To ease difficulties in fabrication to
Myun-Sik Kim +2 more
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The Luneburg-Lissajous lens [PDF]
EPL (Europhysics Letters), 2020 We design a new absolute optical instrument by composing Luneburg lens and Lissajous lens, and analyze its imaging mechanism from the perspective of simple harmonic oscillations. The imaging positions are determined by the periods of motions in x and y directions.
Peng, Huiyan +8 more
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Calibration of Radar RCS Measurement Errors by Observing the Luneburg Lens Onboard the LEO Satellite [PDF]
Sensors, 2022 Accurate radar RCS measurements are critical to the feature recognition of spatial targets. A calibration method for radar RCS measurement errors is proposed for the first time in the context of special target tracking by observing the Luneburg Lens ...
Jie Yang, Ning Li, Pengbin Ma, Bin Liu
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Acoustic waveguide based on cascaded Luneburg lens [PDF]
JASA Express Letters, 2022 This paper investigates the acoustic Luneburg Lens (ALL) as a design framework for guiding acoustic wave propagation. In this study, an acoustic waveguide is proposed based on the characteristics of both acoustic wave focusing and collimation of cascaded
Liuxian Zhao, Timothy Horiuchi, Miao Yu
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A Luneburg Lens Antenna for High-Speed Railway Communication [PDF]
MicromachinesTo address the problems in high-speed railway communication, such as large signal penetration loss through carriages, difficulty in long-distance strip coverage, and limited coverage range of traditional base station antennas, this paper designs a ...
Qiao-Na Qiu, Dong Yang, Jun Wang
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Beam steering performance of compressed Luneburg lens based on transformation optics
Results in Physics, 2018 In this paper, two types of compressed Luneburg lenses based on transformation optics are investigated and simulated using two different sources, namely, waveguides and dipoles, which represent plane and spherical wave sources, respectively.
Ju Gao +4 more
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Graded Photonic Crystals for Luneburg Lens
IEEE Photonics Journal, 2016 The Luneburg lens is a radially graded index refracting structure that forms geometrical images of two given concentric spheres on each other. This remarkable property of the Luneburg lens makes it very attractive for various domains of frequency and ...
F. Gaufillet, E. Akmansoy
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Electrically tunable graded photonic crystal lens based on graphene plasmons [PDF]
Scientific ReportsControlling the nonlinear relationship between surface plasmon polariton (SPP) mode index and chemical potential of graphene can be used in the field of active transformation optics.
Chenglong Wang, Xiang Guo, Xidong Wu
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2D phononic-crystal Luneburg lens for all-angle underwater sound localization
Acta Acustica, 2022 Phononic crystals are well known for acoustic wave manipulation which may have potential application in an underwater acoustic detection system. In this work, we design and simulate a two-dimensional Luneburg lens based on gradient-index (GRIN) phononic ...
Ruan Yongdu, Liang Xu
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