Results 31 to 40 of about 503,018 (197)
Luneburg lens waveguide networks [PDF]
Journal of Optics, 2012 We investigate certain configurations of Luneburg lenses that form light propagating and guiding networks. We study single Luneburg lens dynamics and apply the single lens ray tracing solution to various arrangements of multiple lenses. The wave propagating features of the Luneburg lens networks are also verified through direct numerical solutions of ...
Mattheakis, Marios +2 more
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Slim Luneburg lens for antenna applications
Optics Express, 2011 Luneburg lens is a marvellous optical lens but is extremely difficult to be applied in any practical antenna system due to its large spherical shape. In this paper, we propose a transformation that reduces the profile of the original Luneburg lens without affecting its unique properties.
Angela, Demetriadou, Yang, Hao
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Antenna array with switching scanning in elevation plane
Физика волновых процессов и радиотехнические системы, 2021 It is known that the most reliable communication in hard-to-reach places such as the Arctic, Tundra, Taiga is satellite communication [1-5]. Therefore, for satellite communications, it is necessary to develop your own antenna arrays.
Yuri G. Pasternak +2 more
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Sampling and processing of climate change information and disinformation across three diverse countries. [PDF]
Br J PsycholAbstract In the media, accurate climate information and climate disinformation often coexist and present competing narratives about climate change. Whereas previous research documented detrimental effects of disinformation on climate beliefs, little is known about how people seek climate‐related content and how this varies between cross‐cultural ...
Rahmani Azad Z +4 more
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Wideband Low-Profile Luneburg Lens Based on a Glide-Symmetric Metasurface
IEEE Access, 2020 This paper presents a two-dimensional low-profile Luneburg lens that is designed by using a glide-symmetric metasurface. The entire lens consists of two mirrored metal plates with periodic metal pins, and the pins on one plate are glided exactly a half ...
Fangfang Fan +4 more
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Terahertz multi-beam antenna using photonic crystal waveguide and Luneburg lens
APL Photonics, 2018 Recent years have seen the emergence of efficient, general-purpose terahertz photonic-crystal waveguides etched from high-resistivity silicon. Systems founded upon this platform will require antennas in order to interface with free-space fields.
Daniel Headland +4 more
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Experimental Demonstration of Luneburg Waveguides
Photonics, 2015 Transformation optics gives rise to numerous unusual optical devices, such as novel metamaterial lenses and invisibility cloaks. Very recently, Mattheakis et al. (Luneburg lens waveguide networks. J. Opt.
Vera N. Smolyaninova +6 more
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3D printed Ku band cylindrical Luneburg lens
, 2021 The design of the cylindrical Luneburg lens manufactured by using 3D printing facilities was presented, fabricated and experimentally verified. The two different approaches to lens parameter discretization were applied to lens design and compared.
Munina, I. +2 more
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Broadband Wide Angle Lens Implemented with Dielectric Metamaterials
Sensors, 2011 The Luneburg lens is a powerful imaging device, exhibiting aberration free focusing for parallel rays incident from any direction. However, its advantages are offset by a focal surface that is spherical and thus difficult to integrate with standard ...
Anthony Starr +6 more
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Three-Dimensional Broadband and Isotropic Double-Mesh Twin-Wire Media for Meta-Lenses
Applied Sciences, 2021 Lenses are used for multiple applications, including communications, surveillance and security, and medical instruments. In homogeneous lenses, the contour is used to control the electromagnetic propagation.
Hairu Wang +3 more
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