Ala Sharaiha

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This study deals with microwave properties of glass foams prepared from glass industrial waste. Two types of cullets (one from soda-lime silicate glasses and the other from Cathodic Ray Tubes CRT) have been combined with different foaming agents (C, SiC, AlN). Glass foams electromagnetic properties are primarily determined by their apparent density as well(More)
This paper presents the SRR effect on half-loop antenna characteristics. An original antenna resonating at 3.9GHz is shifted to 881MHz. Its radiation pattern is changed by adding one cell of Split Ring Resonators (SRR). The size of the radiating element is &#x03BB;<sub>0</sub>/9 &#x00D7; &#x03BB;<sub>0</sub>/13 and the ground plane is(More)
A novel multi-frequency printed quadrifilar helix antenna based on Multiple arm technique is presented in this paper. Double frequency and satisfactory antenna characteristics are achieved. The antenna has relatively compact size and hemispherical pattern with excellent circularly polarized coverage. The antenna is designed and simulated with the(More)
This paper deals with the sensitivity of the singularity expansion method to identify antennas. A dipole antenna is considered and the matrix pencil method is applied on its backscattered field. Then, small variations of length, diameter and load impedance are applied on the dipole antenna and the variation of poles in the complex plane is analyzed. It(More)
Advanced dielectric spectroscopy enables studying of the ferroelectric complex permittivity. Interpretation with the hyperbolic law provides a better fundamental understanding of the material’s tunability: bulk contribution, domain wall vibration and displacements may be discerned. Applications, like mobile telecommunication terminals may profit for the(More)
  • Claire Le Paven, Laurent Le Gendre, +11 authors Ala Sharaiha
  • 2017
In the search for new dielectric and ferroelectric compounds, we were interested in the perovskite (Sr1-xLax)2(Ta1-xTix)2O7 solid solution with ferroelectric end members Sr2Ta2O7 (TCurie = -107°C) and La2Ti2O7 (TCurie = 1461°C). In order to achieve a Curie temperature close to room temperature, the formulation with x = 0.01 was chosen and synthetized as(More)