Results 1 to 10 of about 3,021 (195)

Effects of Plant Crown Shape on Microwave Backscattering Coefficients of Vegetation Canopy [PDF]

open access: yesSensors, 2021
A microwave scattering model is a powerful tool for determining relationships between vegetation parameters and backscattering characteristics. The crown shape of the vegetation canopy is an important parameter in forestry and affects the microwave ...
Xiangchen Liu   +7 more
doaj   +2 more sources

ICT INDUSTRY R&D IN HUNGARY [PDF]

open access: yesChallenges of the Knowledge Society, 2011
In this article, the Hungarian ICT Industry related research and development is analysed. The developments and characteristics of the sector are described on one hand on the available statistics and on the other hand on interviews taken with the ...
ADRIENN FEKO
doaj   +2 more sources

Design of a compact quasi-optical mode converter for a 105-GHz gyrotron using optimized perturbation technique [PDF]

open access: yesScientific Reports
This paper presents the design and optimization of a compact quasi-optical (QO) mode converter for a high-performance gyrotron operating at 105 GHz in the $$TE_{17,6}$$ mode.
Hamid Sharif   +3 more
doaj   +2 more sources

RCS computation and data analysis of target base FEKO

open access: yesDianzi Jishu Yingyong, 2018
Radar engineers often have special requirement for the RCS data computation and analysis of target. The investigation of target delectability can been obtained by 1-dimensional probability density functions(PDF) and 2-dimensional RCS intensity.
Qin Qin   +3 more
doaj   +2 more sources

Modified design of microstrip patch antenna for UWB applications [PDF]

open access: yesSerbian Journal of Electrical Engineering, 2020
Ultra-wideband (UWB) patch antenna for Ku/K band applications is presented. In this paper, a microstrip line feed has been modified to an elliptical gradient structure, and the conventional radiator patch has been developed through the use of ...
Elias Bashar Bahaa Qas, Aljanabi Haider
doaj   +1 more source

Implementation of Zero-Thickness Impedance Boundary Condition for Method of Moments and Application to Microstrip Antennas [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2022
To analyze a microstrip antenna consisting of a lossy metal, we proposed a scheme for a method of moments (MoM) to completely implement a zero-thickness impedance boundary condition (IBC).
Jeong-Hun Nam, Il-Suek Koh
doaj   +1 more source

Hybrid Method for Full-Wave Simulations of Forests at L-Band

open access: yesIEEE Access, 2022
The full-wave simulations of 3D Maxwell equations of forests at L-band are carried out with a two-step hybrid method. The tallest trees considered include one 8-meter tall trunk, 18 primary branches and 108 secondary branches.
Weihui Gu   +3 more
doaj   +1 more source

Enhancing the SEM Signature via the Optimum Onset With a Bistatic and Cross-Polarization Radar Configuration

open access: yesIEEE Access, 2020
This paper assesses the feasibility of finding a time bin of optimum onset to improve the robustness of the resonance modes of a midsized aircraft target in the context of radar target identification subject to bistatic and polarization diversities.
Faisal F. H. Aldhubaib
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

Preparation and properties of functional particle Fe3O4-rGO and its modified fiber/epoxy composite for high-performance microwave absorption structure

open access: yesMaterials Research Express, 2020
Microwave absorbing materials have been becoming a countermeasure and security media for radio environment, and also been becoming the main military force attached by the world.
Jiewen Xue   +8 more
doaj   +1 more source

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