Results 21 to 30 of about 1,547 (268)

Synthesis of multi-band reflective polarizing metasurfaces using a generative adversarial network

open access: yesScientific Reports, 2022
Electromagnetic linear-to-circular polarization converters with wide- and multi-band capabilities can simplify antenna systems where circular polarization is required. Multi-band solutions are attractive in satellite communication systems, which commonly
Parinaz Naseri   +3 more
doaj   +1 more source

One-dimensional leaky-wave antenna producing multiple beams

open access: yesAIP Advances, 2017
In this paper, far-field pattern of one-dimensional leaky-wave antenna (LWA) is directly synthesized by sinusoidally modulating surface currents of the antenna.
Xiang Wan, Tian Yi Chen, Tie Jun Cui
doaj   +1 more source

Towards high-power, high-coherence, integrated photonic mmWave platform with microcavity solitons

open access: yesLight: Science & Applications, 2021
Millimetre waves: soliton solutions in optical microcavity Powerful high-frequency radio waves can be generated by shining laser-driven resonating microcavity solitons onto tiny photodiodes, researchers in the USA have shown.
Beichen Wang   +8 more
doaj   +1 more source

Total transmission and super reflection realized by anisotropic zero-index materials

open access: yesNew Journal of Physics, 2012
We demonstrate theoretically and experimentally total transmission and super reflection which are realized by anisotropic zero-index materials (AZIMs). We show that total transmission will be observed when using a rectangular perfectly magnetic conductor
Hui Feng Ma   +3 more
doaj   +1 more source

Behavior of surface plasmon polaritons at the interface of metal and a non-integer dimensional (NID) dielectric medium

open access: yesResults in Physics, 2018
The behavior of surface plasmon polaritons (SPPs) at a planar non-integer dimensional dielectric-metal interface has been studied for the first time. The dimension of the interface is shown to have a strong effect on the behavior of SPPs.
Asad Aziz   +3 more
doaj   +1 more source

Fully metallic frequency selective surface (FSS) circular polarizer based on cost‐effective chemical etching manufacturing technique

open access: yesElectronics Letters, 2023
This letter presents a fully metallic circular polarizer based on a bandpass frequency selective surface (FSS) that converts linear polarization (LP) to circular polarization (CP) in the Ka‐band.
Wai Yan Yong   +2 more
doaj   +1 more source

Space-Air-Ground Integrated 6G Wireless Communication Networks: A Review of Antenna Technologies and Application Scenarios

open access: yesSensors, 2022
A review of technological solutions and advances in the framework of a Vertical Heterogeneous Network (VHetNet) integrating satellite, airborne and terrestrial networks is presented.
Francesco Alessio Dicandia   +4 more
doaj   +1 more source

Real-time terahertz meta-cryptography using polarization-multiplexed graphene-based computer-generated holograms

open access: yesNanophotonics, 2020
As one of the cutting-edge technologies in advanced information science, wave-based cryptography is a prerequisite to enable a plethora of secure encrypting platforms which can be realized by smart multiplexing techniques together with suitable ...
Rajabalipanah Hamid   +5 more
doaj   +1 more source

Visualizing nanometric structures with sub-millimeter waves

open access: yesNature Communications, 2021
The authors demonstrate a far-field approach for height profile measurements with sub-millimetre waves. By evaluating Fabry-Pérot oscillations within surface-structured samples, combined with a Hilbert-transform approach, they visualize structures with a
Alonso Ingar Romero   +4 more
doaj   +1 more source

Double-layer geodesic and gradient-index lenses

open access: yesNature Communications, 2022
A double-layer lens consists of a first gradient-index/geodesic profile in an upper waveguide, partially surrounded by a mirror that reflects the wave into a lower guide where there is a second profile. A family of such lens profiles are derived.
Qiao Chen   +4 more
doaj   +1 more source

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