Results 41 to 50 of about 32,796 (196)
Excitation of guided waves in layered structures with negative refraction
, 2004 We study the electromagnetic beam reflection from layered structures that include the so-called double-negative materials, also called left-handed metamaterials.
Alexander A. Zharov +18 more
core +1 more source
Twisted Beams With Variable OAM Order and Consistent Beam Angle via Single Uniform Circular Arrays
IEEE Access, 2020 A planar antenna radiating twisted beams with different azimuthal order and a consistent beam angle is designed by employing a single uniform circular array embedded in a Fabry-Perot cavity.
Paolo Burghignoli +5 more
doaj +1 more source
Micromachines, 2022 Resonant Bessel-beam launchers are low-cost, planar, miniaturized devices capable of focusing electromagnetic radiation in a very efficient way in various frequency ranges, with recent increasing interest for microwave and millimeter-wave applications (i.
Edoardo Negri +3 more
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Tomorrow's Metamaterials: Manipulation of Electromagnetic Waves in Space, Time and Spacetime
, 2016 Metamaterials represent one of the most vibrant fields of modern science and technology. They are generally dispersive structures in the direct and reciprocal space and time domains.
Caloz, Christophe
core +1 more source
Gap Waveguide Leaky-Wave Antenna
IEEE Transactions on Antennas and Propagation, 2016 A novel leaky wave antenna, realized using gap waveguide concept, is here proposed. Both, the feeding structure and the antenna are realized in groove gap waveguide technology, thus simplifying the whole structure. A complete design procedure, starting from a given groove waveguide to the final radiation mechanism, is described in this paper.
Vukomanovic, Mladen +4 more
openaire +4 more sources
IEEE Photonics Journal, 2013 By solving analytically derived characteristic equations, leaky surface waves are found to exist at an interface between a metal material and a uniaxially anisotropic dielectric material with its optic axis falling in the plane of the interface. Both the
Hsuan-Hao Liu, Hung-chun Chang
doaj +1 more source
IEEE Access, 2019 A technique to derive the propagation characteristics and field distributions of waves guided by a scalar and tensorial reactance surfaces modulated by periodic or discrete Fourier spectrum functions in the propagation direction is presented.
M. Casaletti
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Model of light collimation by photonic crystal surface modes
, 2007 We propose a quantitative model explaining the mechanism of light collimation by leaky surface modes that propagate on a corrugated surface around the output of a photonic crystal waveguide.
E. V. Jull +4 more
core +1 more source
Tunable periodic microstrip structure on GaAs wafer [PDF]
, 2009 A one dimensional tunable periodic structure in microstip technology on gallium arsenide (GaAs) substrate is numerically investigated. The unit cell contains a number of patches positioned between the ground plane and the microstrip line.
Esselle, K. +2 more
core +1 more source
The solution of lee wave problems by the Complex Coordinate Method
Meteorologische Zeitschrift, 1995 The Helmholtz equation appears routinely in lee wave problems. The principle of the solution of this equation by the Complex Coordinate Method is described and applied to various published Scorer profiles.
D. S. Tannhauser, N. Moiseyev
doaj +1 more source