A bi-dimensional compressed Luneburg lens antenna for miniaturization based on transformation optics
Frontiers in Physics, 2022 Transformed Luneburg lens has been widely employed to provide aberration-free imaging and high-gain antenna system, but whose focal plane and beam scanning range decrease correspondingly. In this paper, a two-dimensional compressed elliptical cylindrical
Yadan Zang +5 more
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Direction-of-Arrival Estimation With Planar Luneburg Lens and Waveguide Metasurface Absorber
IEEE Access, 2023 Direction of arrival (DOA) estimation using array antennas is known to have high resolution. However, these algorithms require high computational resources.
Aya Ohmae, Satoshi Yagitani
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Wideband Substrate Integrated Luneburg Lens Using Glide-Symmetric Technology
, 2020 With a glide-symmetric mushroom unit cell, a wideband Luneburg lens is integrated into print circuit boards (PCBs). Due to the low dispersion of such a unit cell of the metallic via in glide-symmetric technology, the equivalent refraction index of the ...
Lei Wang, Wang, Lei
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A Novel Metamaterial-Based Planar Integrated Luneburg Lens Antenna With Wide Bandwidth and High Gain
IEEE Access, 2020 A novel metamaterial-based and broadband planar integrated Luneburg lens antenna is designed, fabricated, and measured. A substrate integrated waveguide (SIW) horn antenna is applied as the source to illuminate the operation of the Luneburg lens.
Bo Hu +4 more
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Focusing higher-order Lamb waves based on the Luneburg lens
Frontiers in Physics, 2023 In order to improve the spatial resolution and the signal-to-noise ratio of Lamb waves in structural health monitoring systems or non-destructive testing techniques, this study presents the construction of Luneburg lenses for focusing higher-order Lamb ...
Tianming Ye +7 more
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Flattened structural Luneburg lens for broadband beamforming [PDF]
The Journal of the Acoustical Society of America, 2020 A conventional structural Luneburg lens is a symmetric circular gradient-index lens with refractive indices decreasing from the centre along the radial direction. In this paper, a flattened structural Luneburg lens (FSLL) based on structural thickness variations is designed by using the quasi-conformal transformation technique.
Liuxian, Zhao, Miao, Yu
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Broadband ultra-long acoustic jet based on double-foci Luneburg lens [PDF]
JASA Express Letters, 2021 In this paper, a gradient index acoustic metamaterial is proposed based on the concept of the optical modified generalized Luneburg lens (MGLL). With the MGLL, double-foci and high energy density between the two foci can be achieved, which enables the ...
Liuxian Zhao, Timothy Horiuchi, Miao Yu
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Broadband bifunctional Luneburg–Fisheye lens based on anisotropic metasurface
Scientific Reports, 2020 Luneburg lenses and Maxwell fisheye lenses possess distinct properties of focusing, well beyond conventional lenses made of uniform materials. In this paper, a planar broadband bifunctional Luneburg-fisheye lens synthesized by gradient anisotropic ...
Jiaqing Chen +4 more
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Acoustic Luneburg lens based on a gradient metasurface for spoof surface acoustic waves [PDF]
JASA Express Letters, 2022 This letter presents the design and experimental demonstration of a gradient metasurface guiding spoof surface acoustic waves (SSAWs) in the manner of a Luneburg lens for sound.
Yi Zheng +7 more
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3D-Printed All-Metal Terahertz Multibeam Lens Antenna Based on Photonic Crystal
IEEE Access, 2023 This paper presents a realization of a D- band multibeam lens antenna based on 3D printing. It extends all-metal Luneburg lens to terahertz band for the first time, and demonstrates the application potential of 3D-printed antenna in the associated ...
Weihua Yu +4 more
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