scholarly journals Resonance of High Tc Superconducting Microstrip Patch in a Substrate-Superstrate Configuration

2014 ◽  
Vol 2 (3) ◽  
pp. 19 ◽  
Author(s):  
S. Benkouda ◽  
T. Fortaki ◽  
M. Amir ◽  
A. Benghalia
Keyword(s):  
Method Of Moments ◽  
Fluid Model ◽  
Complex Surface ◽  
Superconducting Thin Film ◽  
High Permittivity ◽  
High Tc ◽  
Microstrip Patch ◽  
Rectangular Patch ◽  
Two Fluid Model ◽  
Two Fluid

The effect of a protecting dielectric superstrate on the resonance of a high Tc superconducting microstrip patch is investigated. The analysis approach is based on the spectral-domain method of moments in conjunction with the complex resistive boundary condition. The complex surface impedance of the superconducting thin film is determined using London’s equation and the two-fluid model of Gorter and Casimir. Numerical results show that the resonant frequency of the high Tc superconducting rectangular patch decreases monotonically with increasing superstrate thickness, the decrease being greater for high permittivity loading.

scholarly journals Study of Stacked High Tc Superconducting Circular Disk Microstrip Antenna in Multilayered Substrate Containing Isotropic and/or Uniaxial Anisotropic Materials

2019 ◽  
Vol 8 (3) ◽  
pp. 1-5 ◽  
Author(s):  
A. S. Boughrara ◽  
S. Benkouda ◽  
A. Bouraiou ◽  
T. Fortaki
Keyword(s):  
Microstrip Antenna ◽  
Layer Structure ◽  
Fluid Model ◽  
Single Layer ◽  
Circular Disk ◽  
Complex Surface ◽  
Anisotropic Materials ◽  
High Tc ◽  
Two Fluid Model ◽  
Circular Disks

In this paper, we present a rigorous full-wave analysis able to estimate exactly the resonant characteristics of stacked high Tc superconducting circular disk microstrip antenna. The superconducting patches are assumed to be embedded in a multilayered substrate containing isotropic and/or uniaxial anisotropic materials (the analysis is valid for an arbitrary number of layers). London’s equations and the two-fluid model of Gorter and Casimir are used in the calculation of the complex surface impedance of the superconducting circular disks. Numerical results are presented for a single layer structure as well as for two stacked circular disks fabricated on a double-layered substrate.

scholarly journals Resonant Frequency and Bandwidth of Superconducting Microstrip Antenna Fed through a Slot Cut into the Ground Plane

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 147
Author(s):  
Ahmed Mahamdi ◽  
Siham Benkouda ◽  
Skander Aris ◽  
Tayeb A. Denidni
Keyword(s):  
Resonant Frequency ◽  
Microstrip Antenna ◽  
Fluid Model ◽  
Ground Plane ◽  
Rectangular Patch ◽  
Full Wave ◽  
Full Wave Analysis ◽  
Two Fluid Model ◽  
Half Power ◽  
Two Fluid

In this work, an efficient analysis is presented to accurately predict the resonant frequency and bandwidth of superconducting microstrip antenna fed through a slot cut into the ground plane. The effect of the superconductivity of the rectangular patch is introduced in the Full-wave analysis based on Gorter-Casimir two fluid model together with London brothers equations. In order to check the accuracy of the proposed approach, the obtained results have been compared with theoretical and experimental data reported in the literature. Finally, the influence of the slot on the resonant frequency and half-power bandwidth of the superconducting antenna has been investigated.

scholarly journals Natural modes of the two-fluid model of two-phase flow

2021 ◽  
Vol 33 (3) ◽  
pp. 033324
Author(s):  
Alejandro Clausse ◽  
Martín López de Bertodano
Keyword(s):  
Two Phase Flow ◽  
Fluid Model ◽  
Phase Flow ◽  
Two Phase ◽  
Natural Modes ◽  
Two Fluid Model ◽  
Two Fluid

Self-consistent hydrodynamic two-fluid model of vortex plasma

2021 ◽  
Vol 33 (3) ◽  
pp. 037116
Author(s):  
Victor L. Mironov
Keyword(s):  
Fluid Model ◽  
Self Consistent ◽  
Two Fluid Model ◽  
Two Fluid

scholarly journals Mathematical study on two-fluid model for flow of K–L fluid in a stenosed artery with porous wall

2021 ◽  
Vol 3 (4) ◽  
Author(s):  
R. Ponalagusamy ◽  
Ramakrishna Manchi
Keyword(s):  
Theoretical Study ◽  
Fluid Model ◽  
Porous Wall ◽  
Governing Equations ◽  
Rate Of Increase ◽  
Special Cases ◽  
Stenosed Artery ◽  
Flow Through ◽  
Two Fluid Model ◽  
Two Fluid

AbstractThe present communication presents a theoretical study of blood flow through a stenotic artery with a porous wall comprising Brinkman and Darcy layers. The governing equations describing the flow subjected to the boundary conditions have been solved analytically under the low Reynolds number and mild stenosis assumptions. Some special cases of the problem are also presented mathematically. The significant effects of the rheology of blood and porous wall of the artery on physiological flow quantities have been investigated. The results reveal that the wall shear stress at the stenotic throat increases dramatically for the thinner porous wall (i.e. smaller values of the Brinkman and Darcy regions) and the rate of increase is found to be 18.46% while it decreases for the thicker porous wall (i.e. higher values of the Brinkman and Darcy regions) and the rate of decrease is found to be 10.21%. Further, the streamline pattern in the stenotic region has been plotted and discussed.

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