Liste des documents
Structural properties of ZnO thin films deposited by spin-coating method
ZnO thin films are deposited on the glass substrates by sol–gel spin coating technique by varying the concentration of the sol. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were used to investigate the effect of sol concentration on the crystallinity and surface... Voir les détails
Mots clés : ZnO, Thin films, sol-gel, concentration
Two-Port MIMO Cylindrical Dielectric ResonatorAntenna For LTE Systems
In this paper, a single cylindrical dielectric resonatorantenna (CDRA) is designed and proposed for multi-input multioutput(MIMO) wireless communications. The proposed antennais excited from two ports and operated around the samefrequency 1.9 GHz, suitable for the 33 and 35 LTE bands... Voir les détails
Mots clés : cylindrical dielectric resonatorantenna (CDRA), multi-input multioutput(MIMO)
3D-FDTD Analysis of Rectangular Printed Monopole Antenna for UWB Applications
This paper presents numerical study of ultrawideband(UWB) patch antenna using both the FiniteDifference Time Domain (FDTD) method and Ansoft HFSSSoftware. The patch antenna, which consists of a rectangularmonopole, is fed by microstrip line and operates from 3 to 10.9GHz... Voir les détails
Mots clés : Monopole antenna, FDTD method, UWB applications.
Rectangular Dielectric Resonator Antenna Array for 5.8GHZ WLAN Applications
In this paper, design of two rectangular dielectricresonator antenna (DRA) array is presented for wireless localarea networks (WLAN) applications (in the dual frequencyrange 5.15-5.35 GHz and 5.72-5.85 GHz).The DRA array isexcited by microstrip feed line through a single slot located inthe ground... Voir les détails
Mots clés : Rectangular DRA array, wireless local area network (WLAN), FDTD method
Numerical Analysis of a Microstrip MIMO Antenna Array
In this paper, we present a simulation anddesign of a microstrip MIMO antenna array. The basic configuration is a microstrip patch antennas consist of ametallic patch on one side of the dielectric substrate with aground plane on the other side. The antenna system consists of2x4 radiating... Voir les détails
Mots clés : Microstrip antenna, MIMO system, Resonant Frequency, Radiation Pattern, FDTD Method.
Ultra-Wideband Antenna Integrated with Dual-Band Dielectric Resonator
In this paper, we proposed a novel integrated ultrawideband(UWB) monopole antenna with dual-band antenna.The antenna consists of planar rectangular with semi-ellipticalbase and a rectangular dielectric resonator (DRA) with dualbandoperation. Both of them are excited via coplanar... Voir les détails
Mots clés : CPW-fed line, dielectric resonator antenna (DRA), Dual-band antenna, Integrated antennas, UWB antenna.
Performance Evaluation of Omni-Directional Circular UWB Disc Antenna Conformed on a Cylindrical Surface
The cylindrical geometry can offer certain desirable antenna characteristics that are not provided by planar elements. In this paper a conformal omni-directional circular disc antenna which is mounted on a cylindrical surface feeding by a microstrip line is presented and proven to operate... Voir les détails
Mots clés : Conformal antenna, UWB antenna, CST simulator, HFSS simulator.
Experimental Investigations of an Omni-directional Dielectric Resonator Antenna for UWB Systems
In this paper, a new dielectric resonator antenna(DRA) is presented and investigated for ultra wideband (UWB)applications. The UWB antenna has a U-shape and excited by amicrostip fed monopole. The proposed antenna was simulatedand designed using two electromagnetic simulators. To... Voir les détails
Mots clés : Dielectric Resonator Antennas, Measurements, Radition Pattern, UWB applications.
Hybrid Shape Descriptors for an Improved WeldDefect Retrieval in Radiographic Testing
In this paper, four region-based shape descriptors well reported in the literature are used to characterize weld defect types ofcrack, lack of penetration, porosity and solid inclusion, usually encountered in radiographic testing of welds. The rectangularity and the roundness in the geometric... Voir les détails
Mots clés : Weld decfec, radiography, shape descriptor, hybridization
NUMERICAL STUDY OF THE PROPAGATION OF TWO CHIRPED VECTOR SOLITONS IN BIREFRINGENT OPTICAL FIBERS WITH VARIABLE COEFFICIENTS
In this work, we study numerically the propagation of two chirped optical vector solitons in birefringent optical fibers with variable coefficients using the compact split step Padé scheme (CSSPS). In the case of one managed chirped vector soliton, a negative chirp makes the vector soliton... Voir les détails
Mots clés : vector solitons, chirped solitons, birefringent optical fibers, compact split step Padé scheme, coupled higher-order nonlinear Schrodinger equations with variable coefficients, temporal waveform.