Fa
  • Ph.D. (2002)

    electrical engineering

    , Tarbiat Modares University,

  • M.Sc. (1996)

    Electrical engineering telecommunications

    , Tarbiat Modares University,

    Data not found
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ZAHRA ATLASBAF Associate Professor P. O. Box 14115-194, Tehran, IRAN, Office PhoneFax: 98 21 82884345 Email: atlasbaf@modares.ac.ir Web page: www.modares.ac.iratlasbaf B.Sc., Electrical Engineering, University of Tehran, Tehran, Iran. M.Sc., Electrical Engineering (honors), Tarbiat Modares University, Tehran, Iran. Ph.D., Electrical Engineering (honors), Tarbiat Modares University, Tehran, Iran. Research Interests Antennas, Metamaterials, Electromagnetic, Numerical Methods in Electromagnetic, Active passive Microwave circuits, Active Integrated Antennas, Optics, BioElectromagnetic Awards Prominent Professor of Electrical Engineering for the year 2013-2014, in TMU Prominent Inventor of Electrical Engineering for the year 2012-2013, in TMU

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Curriculum Vitae (CV)

Wide Scan Angle Randomly Overlap Subarray Antenna for 5G in 28GHz

Maryam Shadi, Zahra Atlasbaf
Journal Paper , 2021 February 8, {Pages }

Abstract

Synthesizing antenna arrays for fifth-generation communication technology is the most significant issue in the electromagnetic industry and academia. This paper focused on a comprehensive algorithm to design an antenna array used as a 5G base station antenna. The proposed algorithm's goal has an array antenna with high gain, continuous wide scan angle without grating lobe, compact size, minimum cost, and simplicity of construction, particularly in the array feeding network's system. For this purpose, several factors, such as subarray topology, complex weighting function, the minimum number of RF elements, and the optimum number of microstrip layers will be intended. The desired topology is specified with the grating lobe's minimum level by

Method of lines for analysis of plane wave scattering by periodic arrays of magnetically-biased graphene strips

Mehri Ziaee Bideskan, Keyvan Forooraghi, Zahra Atlasbaf
Journal PaperScientific Reports , Volume 11 , Issue 1, 2021 April 7, {Pages 13-Jan }

Abstract

In this paper, efficient analysis of the plane wave scattering by periodic arrays of magnetically-biased graphene strips (PAMGS) is performed using the semi-numerical, semi-analytical method of lines (MoL). In MoL, all but one independent variable is discretized to reduce a system of partial differential equations to a system of ordinary differential equations. Since the solution in one coordinate direction is obtained analytically, this method is time effective with a fast convergence rate. In the case of a multi-layered PAMGS, the governing equations of the problem are discretized concerning periodic boundary conditions (PBCs) in the transverse direction. The reflection coefficient transformation approach is then used to obtain an analyti

Dual polarized engineering the extinction cross-section of a dielectric wire using graphene-based oligomers

Shiva Hayati Raad, Zahra Atlasbaf
Journal PaperScientific Reports , Volume 11 , Issue 1, 2021 April 6, {Pages 10-Jan }

Abstract

In this paper, graphene-coated spherical nanoparticles are arranged around an infinite length dielectric cylinder to enhance its extinction cross-section. Initially, a single longitudinal one-dimensional periodic array is considered in different loci concerning the transverse electric (TE) incident plane wave. It is observed that regardless of the position of the particles, the extinction cross-section of the dielectric cylinder is considerably enhanced with respect to the bare one. Later, by increasing the number of longitudinal plasmonic arrays around the cylinder, each residing in a different azimuthal direction, the extinction cross-section is further manipulated to observe double pronounced Fano resonances. The origin of the Fano reson

Dyadic Green's function for the graphene-dielectric stack with arbitrary field and source points

Shiva Hayati Raad, Zahra Atlasbaf, Mauro Cuevas
Journal PaperarXiv e-prints , 2021 April , {Pages arXiv: 2104.03581 }

Abstract

In this paper, dyadic Green's function for a graphene-dielectric stack is formulated based on the scattering superposition method. To this end, scattering Green's function in each layer is expanded in terms of cylindrical vector wave functions with unknown coefficients. Using the Kronecker delta function in the field expansion, it is considered that the field and source points lie in the arbitrary layers. Afterward, recurrence relations for calculating the unknown expansion coefficients are derived by applying the impedance boundary conditions at the interface of a graphene sheet surrounded by two adjacent dielectric layers. The verification of the calculated coefficients is conducted by utilizing them in the analysis of graphene-based stru

Reconfigurable FSS Based on PIN Diodes for Shared-Aperture X/Ka-Band Antennas

Mousa Abdollahvand, Keyvan Forooraghi, Zahra Atlasbaf, Eduardo Martinez-de-Rioja, Jose A Encinar, Amir Ebrahimi, Saptarshi Ghosh
Conference Paper2021 15th European Conference on Antennas and Propagation (EuCAP) , 2021 March 22, {Pages 04-Jan }

Abstract

This contribution presents a reconfigurable frequency selective surface (FSS) for shared-aperture satellite antennas in X and Ka bands. The FSS has been designed to be reflective at 20 and 30 GHz (transmit and receive frequencies in Ka-band) and to allow switching of transmission and reflection responses in X-band (between 9 and 12 GHz). The FSS unit cell comprises a multi-layer structure, and reconfigurability is achieved using four PIN diodes. An equivalent circuit model has been developed explaining the operating principle of the proposed FSS. The active FSS provides a stable performance for different polarizations under oblique incidence angles.

Dyadic Green's function for the graphene-dielectric stack with arbitrary field and source points

Shiva Hayati Raad, Zahra Atlasbaf, Mauro Cuevas
Journal PaperarXiv preprint arXiv:2104.03581 , 2021 April 8, {Pages }

Abstract

In this paper, dyadic Green's function for a graphene-dielectric stack is formulated based on the scattering superposition method. To this end, scattering Green's function in each layer is expanded in terms of cylindrical vector wave functions with unknown coefficients. Using the Kronecker delta function in the field expansion, it is considered that the field and source points lie in the arbitrary layers. Afterward, recurrence relations for calculating the unknown expansion coefficients are derived by applying the impedance boundary conditions at the interface of a graphene sheet surrounded by two adjacent dielectric layers. The verification of the calculated coefficients is conducted by utilizing them in the analysis of graphene-based stru

Novel phase distributions for large electronically beam-scanning reflectarrays

A Sheikholeslami, Z Atlasbaf
Journal Paper , , {Pages }

Abstract

Novel Phase Distributions for Large Beam-Scanning Reflectarrays

A SHEIKHOLESLAMI, Z ATLASBAF
Journal Paper , , {Pages }

Abstract

Method of lines for the analysis of tunable plasmonic devices composed of graphene-dielectric stack arrays

MZ Bideskan, K Forooraghi, Z Atlasbaf, A Mehrdadian, AV Lavrinenko
Journal Paper , , {Pages }

Abstract

Dual-Functional Ultrawideband Antenna With High Fidelity Factor for Body Area Networks and Microwave Imaging Systems

Z Lasemiimeni, Z Atlasbaf, N Karbaschi
Journal Paper , , {Pages }

Abstract

Solar cell design using graphene-based hollow nano-pillars

SH Raad, Z Atlasbaf
Journal Paper , , {Pages }

Abstract

Bi-functional tunable reflector/high-Q absorber design using VO2 assisted graphene-coated cylinder array

shiva Hayati Raad, Z Atlasbaf
Journal Paper , , {Pages }

Abstract

Novel Element for Bandwidth Improvement of the Reflect-array Antenna

F Ahmadi, K Forooraghi, Z Atlasbaf, J Norolahi
Journal Paper , , {Pages }

Abstract

Stability Analysis of the SIBC Modeling of Graphene in the FDTD Method

F Moharrami, Z Atlasbaf
Journal Paper , , {Pages }

Abstract

A 20/30 GHz Reflectarray Backed by FSS for Shared Aperture Ku/Ka-Band Satellite Communication Antennas

Mousa Abdollahvand, Keyvan Forooraghi, Jose Encinar, Zahra Atlasbaf, Eduardo Martinez-de-Rioja
Journal PaperIEEE Antennas and Wireless Propagation Letters , 2020 February 6, {Pages }

Abstract

This paper presents a dual-polarized and dual-frequency reflectarray backed by a frequency selective surface (FSS) with application to shared aperture Ku/Ka-band satellite communication antennas. The reflectarray has been designed to operate simultaneously at 20 and 30 GHz (downlink and uplink frequencies in Ka-band) using a single-layer configuration, where the printed elements are etched on the upper substrate of a two-layer tri-band FSS. The FSS has been designed to be transmissive at 12 GHz (downlink frequency in Ku-band) and reflective at 20 and 30 GHz. An prototype has been fabricated and tested, showing a good matching with the simulations. The measured gains are 28.5 dBi at 20 GHz and 32.25 dBi at 30 GHz.

Investigating extraordinary optical transmission and sensing performance through periodic bilayer magneto-plasmonic structure

Shaziyeh Tajik, Zahra Atlasbaf
Journal PaperJournal of Applied Physics , Volume 127 , Issue 2, 2020 January 14, {Pages 023102 }

Abstract

This paper proposes the phenomenon of extraordinary optical transmission via a magneto-plasmonic nanostructure, which combines magnetic and plasmonic functionalities. The structure includes an active magnetic film magnetized perpendicular to its surface and a plasmonic metal film, perforated with subwavelength circular annular arrays, with a ring placed in the middle of each annular circle. We use the finite element method and the finite-difference time-domain method for simulation of the structure. Numerical analysis shows an improvement in the Faraday rotation and optical transmission, simultaneously, in a magneto-plasmonic structure based on a silver- and bismuth-substituted ferrite garnet. Simultaneous improvement is achieved by couplin

Tunable GRIN lensing based on graphene-dielectric multilayer metamaterials

Fatemeh Moharrami, Zahra Atlasbaf
Journal PaperJournal of Optics , Volume 22 , Issue 2, 2020 January 10, {Pages 025102 }

Abstract

In this paper, we have proposed effective gradient refractive index structures at terahertz frequencies, which function as a planar lens, focusing reflector, and a generalized Luneburg lens (GLL). We base the structures on planar and cylindrical graphene-dielectric multilayer metamaterials. The structures are designed by tailoring the surface conductivity of the graphene layers to provide a given phase profile along with the structures. Therefore, the customizable focus area of the focusing devices, and the tunable terahertz jet effect that is produced by the GLL result. The proposed structures have potential applications in terahertz imaging, sensing, detecting, and communication areas.

Scattering from Multilayered Graphene-Based Cylindrical and Spherical Particles

Shiva Hayati Raad, Zahra Atlasbaf, Mauro Cuevas
Journal Paper , 2020 March 3, {Pages }

Abstract

This chapter discusses various approaches for calculating the modified Mie-Lorenz coefficients of the graphene-based multilayered cylindrical and spherical geometries. Initially, the Kubo model of graphene surface conductivity is discussed. Then, according to it, the formulations of scattering from graphene-based conformal particles are extracted. So, we have considered a graphene-wrapped cylinder and obtained its scattering coefficients by considering graphene surface currents on the shell. Later, a layered nanotube with multiple stacked graphene-dielectric interfaces is introduced, and for analyzing the plane wave scattering, graphene surface conductivity is incorporated in the transfer matrix method (TMM). Unlike the previous section, th

A Quadrupole Tensor Analysis Approach to Design a Broadband Absorber

A. ESMAEILNIA SHIRVANI, Z. ATLASBAF
Journal PaperIEEE Access , 2020 January , {Pages }

Abstract

Design and fabrication of a novel single-layer Ka-band reflectarray antenna

M Abdollahvand, K Forooraghi, Jose A Encinar, Z Atlasbaf, E Martinez-de-Rioja
Journal PaperInternational Journal of Microwave and Wireless Technologies , Volume 12 , Issue 5, 2020 June , {Pages 409-418 }

Abstract

A novel dual-polarization, single-layer reflectarray has been designed and manufactured to operate at receive (20 GHz) and transmit (30 GHz) frequencies for Ka-band terminal antennas. The reflectarray unit cell is composed of several types of resonant elements printed on the upper side of a conductor-backed substrate, which are designed to produce a collimated beam at 20 and 30 GHz in dual polarization. Cross-shaped loops are used to provide the required phases at 20 GHz, while crossed dipoles and modified truncated rings are used to control the phasing at 30 GHz. The resonant lengths of the proposed elements have been adjusted cell by cell by means of a two-dimensional interpolation method to achieve the required phase shift at each freque

Current Teaching

  • MS.c.

    Microwave Theory II

Teaching History

  • MS.c.

    Advanced Engineering Mathematics

  • MS.c.

    Microwave Theory II

  • Ph.D.

    Special Topics in Telecommunications (Phased Array Antennas)

  • 2018
    Sanaei, Hanie
    design and simulation of monopulse folded reflect array antenna
  • 2018
    Mousavi, Seyyed Ahmad
  • 2019
    Amini, Bahareh
  • 2018
    Sedghara, Ailar
    design and fabrication of a gapwaveguide antenna for automotive radar application

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