Publications by Author: BEDRA, Randa

2021
BEDRA S, BENKOUDA S, BEDRA R, FORTAKI T. Characteristics of HTS inverted circular patches on anisotropic substrates. Journal of Computational Electronics [Internet]. 2021;20 :892-899. Publisher's VersionAbstract

In this study, an efficient full-wave method is developed for characterizing the resonant frequencies, bandwidths, and quality factors of an inverted circular superconducting patch antenna. Our technique is based on the Galerkin procedure in the Hankel transform domain (HTD) combined with the complex resistive boundary conditions. With the use of suitable Green’s functions in the HTD, the analysis is performed for the case where the superconducting circular patches is printed on an anisotropic substrate. The numerical results obtained using this approach are compared with the experimental results. These comparisons were very good, which proves the correctness and the validity of the method. It is found that the optical properties combined with optimally-chosen structural parameters of anisotropic materials can maintain control of the resonant frequency and exhibit wider bandwidth characteristics.

BEDRA S, BENKOUDA S, BEDRA R, FORTAKI T. Inverted HTS rectangular patch antennas: Theoretical investigation. Physica C: Superconductivity and its Applications [Internet]. 2021;580. Publisher's VersionAbstract

In this paper, we propose a full-wave analysis for characterizing the resonant frequencies and bandwidths of high-temperature superconductor inverted microstrip printed on anisotropic substrates. Our proposed approach is based on Galerkin procedure in the Fourier transform domain (FTD) combining with the complex resistive boundary condition. With the use of suitable Green's functions in the FTD, the analysis is performed for the case where the superconducting rectangular patches printed on anisotropic substrate. The numerical results obtained using the proposed approach are compared with previously published numerical results computed by means of the electromagnetic simulator “IE3D software”. These comparisons were very good, which prove the correctness and the validity of the proposed method. It is found that the optical properties combined with optimally chosen structural parameters of anisotropic materials can be maintaining control of the resonant frequency and exhibiting wider bandwidth characteristics.

2019
Gadda A, BEDRA S, Agaba C, BENKOUDA S, BEDRA R, FORTAKI T. Computer-Aided Design of Superconducting Equilateral Triangular Patch on Anisotropic Substrates. Progress In Electromagnetics Research MProgress In Electromagnetics Research M. 2019;86 :203-211.
BEDRA S, BEDRA R, BENKOUDA S, FORTAKI T. Study of an inverted rectangular patch printed on anisotropic substrates. IETE Journal of ResearchIETE Journal of Research. 2019 :1-8.
2018
BEDRA S, BEDRA R, BENKOUDA S, FORTAKI T. Analysis of HTS circular patch antennas including radome effects. International Journal of Microwave and Wireless TechnologiesInternational Journal of Microwave and Wireless Technologies. 2018;10 :843-850.
2017
BEDRA S, BEDRA R, BENKOUDA S, FORTAKI T. Efficient CAD model to analysis of high Tc superconducting circular microstrip antenna on anisotropic substrates. Advanced ElectromagneticsAdvanced Electromagnetics. 2017;6 :40-45.
Barkat L, BEDRA S, FORTAKI T, BEDRA R. Neurospectral computation for the resonant characteristics of microstrip patch antenna printed on uniaxially anisotropic substrates. International Journal of Microwave and Wireless TechnologiesInternational Journal of Microwave and Wireless Technologies. 2017;9 :613-620.
BEDRA S, BEDRA R, BENKOUDA S, FORTAKI T. Superstrate loading effects on the resonant characteristics of high Tc superconducting circular patch printed on anisotropic materials. Physica C: Superconductivity and Its ApplicationsPhysica C: Superconductivity and Its Applications. 2017;543 :1-7.
2016
BEDRA R, BEDRA S, FORTAKI T. Analysis of elliptical-disk microstrip patch printed on isotropic or anisotropic substrate materials. International Journal of Microwave and Wireless TechnologiesInternational Journal of Microwave and Wireless Technologies. 2016;8 :251-255.
BEDRA S, FORTAKI T, MESSAI A, BEDRA R. Spectral domain analysis of resonant characteristics of high Tc superconducting rectangular microstrip patch printed on isotropic or uniaxial anisotropic substrates. Wireless personal communicationsWireless Personal Communications. 2016;86 :495-511.
2015
BEDRA R, BEDRA S, BENKOUDA S, FORTAKI T. Efficient full-wave analysis of resonant modes of circular microstrip antenna printed on isotropic or uniaxially anisotropic substrate. Wireless Personal CommunicationsWireless Personal Communications. 2015;81 :239-251.
Djouane L, BEDRA S, BEDRA R, FORTAKI T. Neurospectral modeling of rectangular patch with rectangular aperture in the ground plane. International Journal of Microwave and Wireless TechnologiesInternational Journal of Microwave and Wireless Technologies. 2015;7 :759-768.
Hassad M, BEDRA S, BEDRA R, BENKOUDA S, Boughrara AS, FORTAKI T. Resonant characteristics of rectangular Microstrip antenna printed on electric–magnetic uniaxial anisotropic substrates. International Journal of Microwave and Wireless TechnologiesInternational Journal of Microwave and Wireless Technologies. 2015;7 :783-790.
BEDRA S, FORTAKI T, BEDRA R, MESSAI A. Modeling and Design of Anisotropic Circular Microstrip Patch Antenna Using Neurospectral Computation Approach. 2015.
2014
BEDRA S, BEDRA R, BENKOUDA S, FORTAKI T. Efficient full‐wave analysis of inverted circular microstrip antenna. Microwave and Optical Technology LettersMicrowave And Optical Technology Letters. 2014;56 :2422-2425.
BEDRA S, BEDRA R, BENKOUDA S, FORTAKI T. Full-wave analysis of anisotropic circular microstrip antenna with air gap layer. Progress In Electromagnetics Research MProgress In Electromagnetics Research M. 2014;34 :143-151.