Results 21 to 30 of about 5,646 (202)
Improved thresholding and quantization techniques for image compression [PDF]
, 2017 In recent decades, digital images have become increasingly important. With many modern applications use image graphics extensively, it tends to burden both the storage and transmission process.
Dr. Muhammad Masruri, Dr. Muhammad Masruri +5 more
core +1 more source
Advanced Electromagnetics, 2019 In this paper, the analysis, design, and measurement of a split ring resonator reflectarray is presented. The 6 different designs of reflectarray are simulated to analyze the effect of splits position on resonance frequency.
N. Naseer, B. Saka
doaj +1 more source
Dual-Polarization Ku-Band Compact Spaceborne Antenna Based on Dual-Reflectarray Optics
Sensors, 2018 This article demonstrated an accurate analysis technique for dual-reflectarray antennas that take into account the angle of incidence of the impinging electric field on the main reflectarray cells. The reflected field on the sub and the main reflectarray
Carolina Tienda +3 more
doaj +1 more source
PERFORATED NANOANTENNA REFLECTARRAY
Progress In Electromagnetics Research M, 2013 This paper presents a design of perforated nanoantenna re∞ectarray. The use of metallic nanostructures made of Silver and/or Gold at appropriate wavelength cause fascinating unusual electromagnetic efiects. Re∞ectarray consists of an array of unit cell made from Silver is investigated.
Saber Helmy Zainud-Deen +3 more
openaire +1 more source
Neural Network Characterization of Reflectarray Antennas [PDF]
, 2012 An efficient artificial neural network (ANN) approach for the modeling of reflectarray elementary components is introduced to improve the numerical efficiency of the different phases of the antenna design and optimization procedure, without loss in ...
Freni, A. +2 more
core +4 more sources
A Low Profile Planar Dual-Polarized Tightly Coupled Dipole Reflectarray With 5:1 Bandwidth
IEEE Open Journal of Antennas and Propagation, 2022 This work introduces an extremely low profile ( $0.4\lambda _{high}$ ) planar ultra-wideband dual-polarized reflectarray. The unit-cell structure of the array is modular in nature, and without any electrical connection between adjacent unit-cells.
Muhammad Hamza +2 more
doaj +1 more source
High efficiency near diffraction-limited mid-infrared flat lenses based on metasurface reflectarrays [PDF]
, 2016 A limiting factor in the development of mid-infrared optics is the lack of abundant materials that are transparent, low cost, lightweight, and easy to machine. In this paper, we demonstrate a metasurface device that circumvents these limitations.
Aieta, Francesco +11 more
core +3 more sources
Approximate Analytical Technique to Design Reflectarray Antenna
Advanced Electromagnetics, 2016 This paper presents an analysis and design for a reflectarray antenna composed of an array of rectangular patches printed on a grounded dielectric slab.
H. M. Yamani +2 more
doaj +1 more source
Dual-Band Frequency Selective Surface-Backed Reflectarray for High-Speed Ka-Band Satellites
Applied SciencesA dual-band, dual-polarized frequency selective surface (FSS)-backed multilayer reflectarray antenna is designed for 5G high-speed satellites operating at Ka-band uplink and downlink frequencies (20/30 GHz).
Ahmet Hulusi Gülseren +2 more
doaj +1 more source
MEMS-reconfigurable metamaterials and antenna applications [PDF]
, 2014 This paper reviews some of our contributions to reconfigurable metamaterials, where dynamic control is enabled by micro-electro-mechanical systems (MEMS) technology.
Debogovic, Tomislav +1 more
core +3 more sources