Results 21 to 30 of about 34,661 (217)

A Fast Algorithm for Establishing 3-D Scattering Center Model for Ship Targets over Sea Surface Using the Shooting and Bouncing Ray Technique

open access: yesLeida xuebao, 2019
Fast construction of the 3-D scattering centers of ship targets on the sea surface is important for many radar applications, including the fast signature prediction, feature extraction, and automatic recognition of targets.
YAN Hua   +5 more
doaj   +1 more source

Surface plasmon dispersion and modes on the graphene metasurface with periodical ribbon arrays

open access: yesMaterials Research Express, 2020
Graphene plasmonics on the structured metasurface demonstrate many exotic properties which can combine novel nanomaterials and well-established plasmonics, providing unique opportunities to develop a series of novel photonic, plasmonic and optoelectronic
Yong-Qiang Liu   +2 more
doaj   +1 more source

Scaled Sea Surface Design and RCS Measurement Based on Rough Film Medium

open access: yesSensors, 2022
The electromagnetic (EM) scattering characteristics of the rough sea surface is very important for target surveying and detection in a sea environment. This work proposes a scaled sea surface designing method based on a rough thin-film medium.
Chenyu Guo   +4 more
doaj   +1 more source

Terahertz Radar Cross Section Measurements Based on Millimeter-wave Converter

open access: yesLeida xuebao, 2018
The measurement system has been built with Stepped Frequency Continuous Wave (SFCW) signal for Radar Cross Section (RCS) measurements in free-space at 220~330 GHz.
Wu Yang   +3 more
doaj   +1 more source

Evaluation of the Trapped Surface Wave of a Vertical Electric Dipole Based on Undetermined Coefficient Method in the Presence of N-Layered Region: A Graphical Approach

open access: yesInternational Journal of Antennas and Propagation, 2019
In previous studies, the trapped surface wave, which is defined by the residue sums, has been addressed in the evaluation of the Sommerfeld integrals describing electromagnetic field of a vertical dipole in the presence of three-layered or four-layered ...
Hong Lei Xu   +5 more
doaj   +1 more source

Improved Point Dipole Model for Subwavelength Resolution Scattering Near-Field Optical Microscopy (SNOM)

open access: yesInternational Journal of Antennas and Propagation, 2020
High-resolution microscopy technique is of significant importance for studying nanomaterials. It is necessary to understand the near-field interaction between the probe and substrate materials in order to get the fine structure of the nanomaterial in the
Guizhen Lu   +4 more
doaj   +1 more source

Some features of a radio signal interaction with a turbulent atmosphere

open access: yesФизика волновых процессов и радиотехнические системы, 2022
On the basis of the solution of Maxwell’s equations system for electromagnetic radiation in a turbulent atmosphere the differential effective section of scattering of this radiation on turbulence is found.
Dmitriy S. Klyuev   +5 more
doaj   +1 more source

An effective methodology to design scale model for magnetic absorbing coatings based on ORL

open access: yesResults in Physics, 2017
The scale measurement has a great significance in studying electromagnetic scattering properties. But there still exist great difficulties in constructing an accurate scale model including nonmetallic materials such as magnetic absorbing coatings.
Liming Yuan   +5 more
doaj   +1 more source

Spatial-Variant SAR Range Cell Migration Correction Using Subaperture Strategy

open access: yesSensors, 2021
The coupling between range and azimuth dimensions is the main obstacle for highly squinted synthetic aperture radar (SAR) data focusing. Range walk correction (RWC) processing is effective to remove the linear coupling term, but the residual high order ...
Liping Hu, Guanyong Wang, Lin Hou
doaj   +1 more source

Materials‐Driven Additive Manufacturing for Electrical Machines: Qualification‐Oriented Design Beyond Geometric Freedom

open access: yesAdvanced Engineering Materials, EarlyView.
This perspective reframes additive manufacturing for electrical machines as a qualification‐limited materials and architecture design problem. It links process–structure–property–performance relationships to magnetic, conducting, dielectric, and thermal property windows, highlighting where AM can enable segmented magnetic circuits, permanent magnet ...
Dénes Fodor, Loránd Szabó
wiley   +1 more source

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