2012
DOI: 10.1109/tap.2012.2207051
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Design of High-Gain Lens Antenna by Gradient-Index Metamaterials Using Transformation Optics

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Cited by 84 publications
(59 citation statements)
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“…In this method, the paths of electromagnetic waves inside a material are controlled by introducing a prescribed spatial variation in the constitutive parameters (the electric permittivity and magnetic permeability) [11]. As an interesting application, for example, using this powerful method can improve the radiation characteristics of the antenna [13,14]. TO relies on the form-invariance of Maxwell's equations under a spatial coordinate transformation [10,12].…”
Section: Introductionmentioning
confidence: 99%
“…In this method, the paths of electromagnetic waves inside a material are controlled by introducing a prescribed spatial variation in the constitutive parameters (the electric permittivity and magnetic permeability) [11]. As an interesting application, for example, using this powerful method can improve the radiation characteristics of the antenna [13,14]. TO relies on the form-invariance of Maxwell's equations under a spatial coordinate transformation [10,12].…”
Section: Introductionmentioning
confidence: 99%
“…Some efforts have been made to reduce the sidelobe levels of horn antennas [2][3][4][5][6][7][8][9]. State-of-theart techniques for implementing horn antennas having low sidelobe levels are corrugating the interior surfaces [2][3][4], which yields a structure more bulky and difficult to fabricate, applying longitudinal metallic vanes or trifurcations inside the horn to step the electric field in the E plane [5], using optical ray technique [6], employing dispersion engineering of metamaterial properties [7], and design of metasurfaces [8] to taper the aperture distribution.…”
Section: Introductionmentioning
confidence: 99%
“…State-of-theart techniques for implementing horn antennas having low sidelobe levels are corrugating the interior surfaces [2][3][4], which yields a structure more bulky and difficult to fabricate, applying longitudinal metallic vanes or trifurcations inside the horn to step the electric field in the E plane [5], using optical ray technique [6], employing dispersion engineering of metamaterial properties [7], and design of metasurfaces [8] to taper the aperture distribution. A new technique was recently proposed, which uses transformation optics [9] in order to design a horn antenna with low H-plane sidelobes.…”
Section: Introductionmentioning
confidence: 99%
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“…Made by graded photonic crystal, the gradient-index lens can lead to high gain and low sidelobes with this lens placed inside a horn antenna [5]. Using gradient-index or zero-index metamaterials, three-dimensional anisotropic lenses have been designed and experimentally demonstrated in [6,7].…”
Section: Introductionmentioning
confidence: 99%