Conceptual design of a beam steering lens through transformation electromagnetics

Yi, Jianjia; Burokur, Shah Nawaz; Lustrac, André de

doi:10.1364/oe.23.012942

Cited by 33 publications

(26 citation statements)

References 46 publications

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“…The design of the beam steering lens is based on the theoretical model that we have recently proposed 33 . Figure 1a shows the air-filled virtual space which is formed by the quadrilateral A’B’C’D’ in the ( x ’, y ’) coordinates and the desired physical space is formed by the rectangle ABCD in the ( x, y ) coordinates, as presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Coherent beam control with an all-dielectric transformation optics based lens

Yi¹,

Burokur²,

Piau³

et al. 2016

Sci Rep

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Transformation optics (TO) concept well known for its huge possibility in patterning the path of electromagnetic waves is exploited to design a beam steering lens. The broadband directive in-phase emission in a desired off-normal direction from an array of equally fed radiators is numerically and experimentally reported. Such manipulation is achieved without the use of complex and bulky phase shifters as it is the case in classical phased array antennas. The all-dielectric compact low-cost lens prototype presenting a graded permittivity profile is fabricated through three-dimensional (3D) polyjet printing technology. The array of radiators is composed of four planar microstrip antennas realized using standard lithography techniques and is used as excitation source for the lens. To validate the proposed lens, we experimentally demonstrate the broadband focusing properties and in-phase directive emissions deflected from the normal direction. Both the far-field radiation patterns and the near-field distributions are measured and reported. Measurements agree quantitatively and qualitatively with numerical full-wave simulations and confirm the corresponding steering properties. Such experimental validation paves the way to inexpensive easy-made all-dielectric microwave lenses for beam forming and collimation.

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Section: Resultsmentioning

confidence: 99%

Coherent beam control with an all-dielectric transformation optics based lens

Yi¹,

Burokur²,

Piau³

et al. 2016

Sci Rep

Self Cite

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show abstract

“…As stated in our theoretical study [28], the determination of the mapping between the virtual space which is free space and the physical space which is the transformed medium lens is introduced by solving Laplace's equations subject to predefined boundary conditions using Comsol Multiphysics Partial Differential Equation (PDE) solver. For simplicity, the transformation deals with a 2D model with incident transverse electric (TE) polarized wave.…”

Section: Design Of the Metamaterials Lensmentioning

confidence: 99%

“…Recently, we experimentally validated the design of a conformal lens capable of restoring in-phase emissions from an array of radiators fixed to a no-planar surface [27]. We further proposed the design procedure of a lens, which is able to steer the radiated beam of an EM radiator [28]. The design was based on the mapping obtained by solving the Laplace's equation with Dirichlet-Neumann sliding boundary condition and was validated by two-dimensional (2D) numerical simulations.…”

Section: Introductionmentioning

confidence: 99%

Metamaterial lens for beam steering

Lustrac

Burokur

2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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A metamaterial-based lens, calculated using transformation optics concept, is designed using electric-LC resonators. A planar microstrip antenna source is used as transverse electric polarized wave launcher for the lens. Both the far field radiation patterns and the near-field distributions have been measured to experimentally demonstrate the beam steering properties. Measurements agree quantitatively and qualitatively with numerical simulations and a non-narrow frequency bandwidth operation is observed.

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“…In particular, QCTO provides the possibility to work with arbitrary shapes and avoid singularities. Thus it has been applied to design arbitrary cloak 29 and functional lenses 30–33 . Some optical devices were realized simply with dielectric materials and gradient refractive index metamaterials.…”

Section: Introductionmentioning

confidence: 99%

3D field-shaping lens using all-dielectric gradient refractive index materials

Ding

et al. 2017

Sci Rep

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A novel three-dimensional (3D) optical lens structure for electromagnetic field shaping based on spatial light transformation method is proposed at microwave frequencies. The lens is capable of transforming cylindrical wavefronts into planar ones, and generating a directive emission. Such manipulation is simulated and analysed by solving Laplace’s equation, and the deformation of the medium during the transformation is theoretically described in detail. The two-dimensional (2D) design method producing quasi-isotropic parameters is further extended to a potential 3D realization with all-dielectric gradient refractive index metamaterials. Numerical full-wave simulations are performed on both 2D and 3D models to verify the functionality and broadband characteristics of the calculated lens. Far-field radiation patterns and near-field distributions demonstrate a highly radiated directive beam when the lens is applied to a conical horn antenna.

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Conceptual design of a beam steering lens through transformation electromagnetics

Cited by 33 publications

References 46 publications

Coherent beam control with an all-dielectric transformation optics based lens

Coherent beam control with an all-dielectric transformation optics based lens

Metamaterial lens for beam steering

3D field-shaping lens using all-dielectric gradient refractive index materials

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