Results 11 to 20 of about 1,807 (185)

Analysis of Target Electromagnetic Scattering Characteristics Based on Accelerated SBR Algorithm

open access: yesInternational Journal of Antennas and Propagation
Aiming at the inefficiency problem faced when analyzing the electromagnetic scattering characteristics of electrically large-sized targets, this paper, based on the existing bounding volume hierarchy (BVH) tree accelerated data structure commonly used in
Xuanji Wang, Nan Bi, Zhan Meng
doaj   +2 more sources

Modified Physical Optics Approximation for RCS Calculation of Electrically Large Objects with Coated Dielectric [PDF]

open access: yesJournal of Electrical and Computer Engineering Innovations, 2015
The Radar Cross Section of a target plays an important role in the detection of targets by radars‎. ‎This paper presents a new method to predict the bistatic and monostatic RCS of coated electrically large objects.
H. Mohammadzadeh   +2 more
doaj   +1 more source

Accurate Formulation of the Skin and Proximity Effects in High-Speed Cable System

open access: yesIEEE Access, 2022
An efficient transmission line model of high-speed cables is established, to predict its response at a high-frequency region (up to 20 GHz). Especially, an appropriate conformal mapping technique is applied to formulate the per-unit-length parameters of ...
Oussama Gassab   +10 more
doaj   +1 more source

Calibration and Stokes Imaging with Full Embedded Element Primary Beam Model for the Murchison Widefield Array [PDF]

open access: yes, 2017
15 pages, 11 figures. Accepted for publication in PASA. © Astronomical Society of Australia 2017The Murchison Widefield Array (MWA), located in Western Australia, is one of the low-frequency precursors of the international Square Kilometre Array (SKA ...
Bell, M. E.   +24 more
core   +4 more sources

Multi-radar fusion technique for high-resolution ISAR imaging in sea-cluttered environment

open access: yesThe Journal of Engineering, 2019
Radar imaging of the ship is one of the important means for surveillance and reconnaissance of targets. Here, the K-distribution is used for the statistical characterisation of echo model in sea-clutter environment.
Liu Yi   +3 more
doaj   +1 more source

Aluminium Feeds for Reflector for NadirSAR [PDF]

open access: yes, 2018
With the long term aim of developing a NadirSAR quadrotor UAV system specialized for monitoring broad acre grain fields, a large aperture load bearing antenna to use as the main structural element was sort.
Gray, Derek, Le Kernec, Julien
core   +1 more source

Field calculation of electric dipole excitation of a metafilm printed on a finite‐thickness dielectric slab using the susceptibility homogenization method

open access: yesIET Microwaves, Antennas & Propagation, 2021
Here, the authors calculate the fields due to the electric dipole that excites a homogenized metasurface which is printed on a finite thickness dielectric slab. The problem is solved by replacing the total parts below the periodic array which contain the
A. Azari, Z.H. Firouzeh, A. Bakhtafrouz
doaj   +1 more source

Structural Antennas for 3cm Radar Onboard Multi-Rotor UAV [PDF]

open access: yes, 2017
A series of 3cm amateur band radar antennas suitable for installation on a cinematic grade multi-rotor UAV were considered. A wideband open waveguide mouth antenna was developed that can be made from the existing arms of a multi-rotor UAV without any ...
Gray, D., Le Kernec, J.
core   +1 more source

Circular SAR Optimization Imaging Method of Buildings

open access: yesLeida xuebao, 2015
The Circular Synthetic Aperture Radar (CSAR) can obtain the entire scattering properties of targets because of its great ability of 360° observation. In this study, an optimal orientation of the CSAR imaging algorithm of buildings is proposed by applying
Wang Jian-feng   +4 more
doaj   +1 more source

An investigation into the Gustafsson limit for small planar antennas using optimisation [PDF]

open access: yes, 2013
The fundamental limit for small antennas provides a guide to the effectiveness of designs. Gustafsson et al, Yaghjian et al, and Mohammadpour-Aghdam et al independently deduced a variation of the Chu-Harrington limit for planar antennas in different ...
Lewis, Andrew   +2 more
core   +2 more sources

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