Beam steering based on coordinate transformation of Fermat spiral configurations
TLDR
In this paper, a two-dimensional transformational electromagnetic (T-E) device formed by configuring a circular disc with a Fermat spiral is realized by tuning the phase of the emanating wave in the T-E medium, antenna switching and beam steering are made possible.Abstract:
A two-dimensional transformational electromagnetic (T-E) device formed by configuring a circular disc with a Fermat spiral is realized. By tuning the phase of the emanating wave in the T-E medium, antenna switching and beam steering are made possible. To simplify the permittivity and permeability tensors of the proposed T-E device, a gradient index approach is employed using purely dielectric material, which is then realized using photonic crystals. The results are verified numerically using full wave simulations.read more
Citations
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General design of 3D piecewise homogeneous illusion devices with arbitrary shapes
Chengfu Yang,Chengfu Yang,Ming Huang,Ming Huang,Jingjing Yang,Jingjing Yang,Tinghua Li,Tongzheng Pu,Fuchun Mao +8 more
TL;DR: A perfect 3D invisibility cloak is achieved by shrinking the wrapped object to sufficiently small dimensions as compared to the operating frequency and an electromagnetic concentrator is obtained by replacing the coated object of the amplifying device with a compression medium.
References
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Controlling Electromagnetic Fields
TL;DR: This work shows how electromagnetic fields can be redirected at will and proposes a design strategy that has relevance to exotic lens design and to the cloaking of objects from electromagnetic fields.
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Metamaterial Electromagnetic Cloak at Microwave Frequencies
David Schurig,Jack J. Mock,B.J. Justice,Steven A. Cummer,John B. Pendry,Anthony F. Starr,David R. Smith +6 more
TL;DR: This work describes here the first practical realization of a cloak of invisibility, constructed with the use of artificially structured metamaterials, designed for operation over a band of microwave frequencies.
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Optical Conformal Mapping
TL;DR: A general recipe for the design of media that create perfect invisibility within the accuracy of geometrical optics is developed, which can be applied to escape detection by other electromagnetic waves or sound.
Journal ArticleDOI
Broadband Ground-Plane Cloak
TL;DR: An experimental realization of a cloak design that conceals a perturbation on a flat conducting plane, under which an object can be hidden, and results indicate that this type of cloak should scale well toward optical wavelengths.
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Design of electromagnetic cloaks and concentrators using form-invariant coordinate transformations of Maxwell’s equations
TL;DR: In this article, a square electromagnetic cloak and an omni-directional electromagnetic field concentrator are described and the functionality of the devices is numerically confirmed by two-dimensional finite element simulations.