Results 61 to 70 of about 944,511 (369)

A Novel Rotation-Based Standardless Calibration and Characterization Technique for Free-Space Measurements of Dielectric Material

open access: yesIEEE Journal of Microwaves
This article presents a novel transmission-only calibration technique for free-space quasi-optical material characterization, based on rotating the sample around its axis to vary the angle of incidence under which the sample is illuminated.
Adrian Diepolder   +5 more
doaj   +1 more source

Spacial Energy Distribution Manipulation with Multi-focus Huygens Metamirror

open access: yesScientific Reports, 2017
Huygens metasurface is a planar array of crossed electric and magnetic dipoles, which provide specific surface current to tailor the electromagnetic field distribution.
Zhuochao Wang   +3 more
doaj   +1 more source

Measuring Ocean Surface Current in the Kuroshio Region Using Gaofen-3 SAR Data

open access: yesApplied Sciences, 2021
The Kuroshio is the strongest warm current in the western North Pacific, which plays a crucial role in climate and human activities. In terms of this, the accurate acquisition of ocean surface current velocity and direction in the Kuroshio region is of ...
Yan Li   +4 more
doaj   +1 more source

Controlled microwave heating in modern organic synthesis.

open access: yesAngewandte Chemie, 2004
Although fire is now rarely used in synthetic chemistry, it was not until Robert Bunsen invented the burner in 1855 that the energy from this heat source could be applied to a reaction vessel in a focused manner. The Bunsen burner was later superseded by
C. Kappe
semanticscholar   +1 more source

Sea Spike Suppression Method Based on Optimum Polarization Ratio in Airborne SAR Images

open access: yesSensors, 2021
In the condition of ocean observation for high-resolution airborne synthetic aperture radar (SAR), sea spikes will cause serious interference to SAR image interpretation and marine target detection. In order to improve the ability of target detection, it
Yawei Zhao   +4 more
doaj   +1 more source

A Flexible and Lightweight Biomass-Reinforced Microwave Absorber

open access: yesNano-Micro Letters, 2020
A flexible and lightweight microwave absorber was prepared by a vacuum filtration method. The remarkable microwave absorbency makes the absorber paper attractive in wireless wearable electronics field.
Yan Cheng   +4 more
semanticscholar   +1 more source

Vortices at Microwave Frequencies [PDF]

open access: yesPhysical Sciences Reviews, 2017
AbstractThe behavior of vortices at microwave frequencies is an extremely useful source of information on the microscopic parameters that enter the description of the vortex dynamics. This feature has acquired particular relevance since the discovery of unusual superconductors, such as cuprates.
Silva, Enrico   +2 more
openaire   +4 more sources

Uncoupled Digital Radars Creating a Coherent Sensor Network

open access: yesIEEE Journal of Microwaves
Radar networks offer the possibility to overcome the limitations of single sensors. However, without coherent signal processing, the full potential of radar networks cannot be exploited.
Julian Aguilar   +4 more
doaj   +1 more source

Wideband planar dipole based on dual-layer artificial magnetic conductor

open access: yesThe Journal of Engineering, 2019
A wideband planar dipole based on dual-layer artificial magnetic conductor (AMC) is designed. First, the size of dual-layer AMC is reduced by more than half, and the in-phase band is wider than the single-layer AMC.
Suyang Shi   +3 more
doaj   +1 more source

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

open access: yesNanomaterials, 2020
Zinc oxide (ZnO) is a multifunctional material due to its exceptional physicochemical properties and broad usefulness. The special properties resulting from the reduction of the material size from the macro scale to the nano scale has made the ...
J. Wojnarowicz, T. Chudoba, W. Lojkowski
semanticscholar   +1 more source

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