Keivan Kaboutari

@ua.pt

Dept. de Eletrónica, Telecomunicações e Informàtica Universidade de Aveiro
Instituto de Telecomunicações and Dept. de Eletrónica, Telecomunicações e Informàtica Universidade de Aveiro

Keivan Kaboutari


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https://researchid.co/k.kaboutari
Keivan Kaboutari graduated B.Sc. in February 2003 from the Department of Electrical and Electronics Engineering of the Islamic Azad University, West Azarbaijan, Urmia Branch, in the Telecommunication Engineering field of education. He received his M.Sc. at the METU in the Electrical and Electronics Engineering-Biomedical program in February 2017. During the M.Sc. program, he worked as a research assistant in the Lorentz Force Electrical Impedance Tomography (LFEIT) project. This project was developed in the framework of TUBITAK and COST Action BM1309: European network for innovative uses of EMFs in biomedical applications (EMF-MED). He worked in companies and universities, mainly as a programmer, designer of digital circuits with microcontrollers and microprocessors, IT center manager, and lecturer. He is a Ph.D. candidate from Aveiro University, Aveiro, Portugal. As a researcher, he is a member of AI-Beam, POWER - 5G RU Indoor Antenna Design projects, and CMU Portugal Affiliated Ph.D.

EDUCATION

B.Sc. of Electrical and Electronics Engineering - Telecommunication Engineering, Islamic Azad University, West Azarbaijan, Urmia Branch (Iran)
M.Sc. of Electrical and Electronics Engineering - Biomedical Engineering, Middle East Technical University (METU), Ankara (Turkey)
Ph.D. student of Electronics, Telecommunications and Informatics Department, University of Aveiro (UA), Aveiro (Portugal)

RESEARCH, TEACHING, or OTHER INTERESTS

Electrical and Electronic Engineering, Engineering, Computer Engineering, Artificial Intelligence
22

Scopus Publications

210

Scholar Citations

7

Scholar h-index

5

Scholar i10-index

Scopus Publications

  • M-SRR-Based Microwave Sensor Design and Modeling for Evaluating Transformer Oil Quality and Lifespan Employing Relative Permittivity
    Shokooh Sadat Kooshki, Javad Ghalibafan, Fatemeh Dehghani, Keivan Kaboutari
    IEEE Sensors Journal, 2026
  • Circularly polarized magneto-electric dipole antenna with microstrip line cross aperture-coupled excitation
    Zhale Amiri, Changiz Ghobadi, Javad Nourinia, Keivan Kaboutari, Majid Shokri, et al.
    Results in Engineering, 2026
  • Wideband omnidirectional radiation linearly polarized antenna for UHF and DTV applications
    Shokooh Sadat Kooshki, Fatemeh Dehghani, Keivan Kaboutari, Javad Ghalibafan
    AEU International Journal of Electronics and Communications, 2025
  • Mechanically Reconfigurable GRIN Lens Concept for Focusing and Beamforming Applications
    K. Kaboutari, X. Liu, A. Abraray, P. Pinho, S. Shen, et al.
    Proceedings of the International Conference on Electromagnetics in Advanced Applications Iceaa, 2025
  • Modeling and Design of Improved-Gain Wideband Magneto-Electric Dipole Antenna for Micro-BTS Applications
    Zhale Amiri, Keivan Kaboutari, Changiz Ghobadi, Javad Nourinia, Majid Shokri, et al.
    Radio Science, 2024
    A wideband Magneto‐Electric Dipole (MED) antenna with high gain is proposed for the 700/800/850/900 MHz frequency bands for cellular network applications. The antenna comprises a half‐wavelength bow‐tie‐shaped dipole, an elongated magnetic loop and a ground reflector with four Elevated Ground Planes (EGPs) at reflector's corners. The EGPs enhance the antenna gain and Front‐to‐Back Ratio (FBR), which is a promising technique in the MED antenna design. The antenna is excited by a ‐shaped coupling element. An analytical model of the proposed antenna is developed by employing Schelkunoff's model for dipole antennas and the transmission line theory complemented by radiation resistance corrections. The antenna design is validated with full‐wave numerical simulations. The antenna is fabricated using cut and bent metallic plates and tested in an anechoic chamber. The analytical, numerical and experimental results are in a good agreement. The experimental results confirm that the proposed MED antenna with dimensions of achieves a bandwidth of 61.53% (623.1–1176.8 MHz) for and a stable gain of 9.8 1.9 dBi. By employing the EGPs, the realized peak gain and FBR are enhanced by 0.52 dBi and 1.1 dB, respectively.
  • Numerically Optimized Fourier Transform-Based Beamforming Accelerated by Neural Networks
    Keivan Kaboutari, Abdelghafour Abraray, Stanislav Maslovski
    Applied Sciences Switzerland, 2024
    Conventional beamforming methods for reconfigurable reflector antennas assume full control over the amplitude and phase of the reflected field. Here, we develop a novel beamforming methodology for reflecting Programmable Metasurfaces (PMS) with capacitive memory. Although utilizing such fully reactive PMS simplifies antenna design and reduces energy consumption, the PMS reflection magnitude is unity and thus a global optimization of the reflection phases over the PMS unit cells is required in each beamforming scenario. We propose an implementation of such an optimization method rooted in the traditional Fourier transform-based beamforming and evaluate its performance. Additionally, we show that a pair of trained feed-forward neural networks (FFNN) with one input, one hidden, and one output layer can replace time-consuming global optimizations in the case of a PMS comprising 3×10 unit cells. We train the FFNNs on a dataset obtained for typical single- and dual-beam beamforming scenarios. After training, the FFNNs perform requested beamforming tasks within a fraction of second and with about the same accuracy as the original optimization algorithm. The proposed methodology may find applications in future mobile telecommunication systems that require real-time beamforming on low-end hardware. The same beamforming methodology can be also employed in short-range wireless power transfer systems.
  • Impact of Phase Optimization on the Cascade Channel and System Performance of RIS-Assisted Wireless Networks
    Abdelghafour Abraray, Sherif A. Busari, Keivan Kaboutari, Jonathan Rodriguez, Stanislav I. Maslovski
    2024 International Microwave and Antenna Symposium Imas 2024, 2024
    In this work, we investigate the impacts of the Reconfigurable Intelligent Surface (RIS) phases or reflection matrix on the effective cascade (i.e., joint transmitter (TX)-to-RIS and RIS-to-receiver (RX)) channel and on the system performance for RIS-aided wireless networks. Using channel gain, signal-to-noise ratio and spectral efficiency as metrics, we demonstrate that our physical model-based RIS phases employing an optimized Fourier Transform (FT)-based beam-forming algorithm outperforms the cosine similarity (CS) phase algorithm. Unlike the CS algorithm where the RIS phases are deduced from the joint incident and reflected channel vectors, the optimized FT-based phases are blind to the cascade channels. We benchmark our results with random RIS phases as well as the mathematical upper bound. The results show that the FT phases outperform the CS and random phases, and approach the mathematical upper bound performance under diverse system parameters and configurations.
  • PIN-diode controlled slot-fed MED antenna for 5G sub-6 GHz applications
    Keivan Kaboutari, Amir Siahcheshm, Majid Shokri, Zhale Amiri, Abdelghafour Abraray, et al.
    Proceedings of the International Conference on Electromagnetics in Advanced Applications Iceaa, 2024
    A new reconfigurable Magneto-Electric Dipole (MED) antenna with a slot feed for 5 G sub-6 GHz applications is designed using the “surrogateopt” optimization algorithm. The antenna covers the n78 and n79 frequency bands when a control PIN diode is in “on” and “off” states, respectively. Impedance matching of the proposed MED antenna is achieved by altering the slot width at its center. Full-wave numerical simulations have been conducted to optimize and verify the antenna performance. An equivalent circuit based on Schelkunoff’s theory for dipole antennas and the transmission line theory has been developed to model the antenna input impedance analytically. Both simulation and analytical modeling results show that the proposed reconfigurable MED antenna, with dimensions of $71 \\times 71 \\times 13.63 \\mathrm{~mm}^{3}$, fully covers the n78 and n79 bands and maintains stable gains above 7.6 dBi in these bands.
  • 5G Indoor Micro-BTS Antenna Design Using Quad-MIMO MED Antennas
    K. Kaboutari, P. Pinho, A. S. R. Oliveira
    2023 Photonics and Electromagnetics Research Symposium Piers 2023 Proceedings, 2023
    The purpose of this work is to present a novel design and application for a printed Magneto-Electric Dipole (MED) antenna with a directional pattern and high gain intended for use in the n78-5G NR frequency band implementations. Indeed, the MED antenna should have a resonance frequency of 3.5 GHz and work within the 3.3 to 3.8 GHz range. The electric and magnetic dipoles as well as a reflector ground structure have been formed on an FR4 substrate with a thickness of 1 mm. The manufactured antenna has a 10 dBi stable gain in its frequency band. It also exhibits a S11 of less than -25 dB at a resonance frequency of 3.5 GHz. As a result, a quad Multiple-Input/Multiple-Output (MIMO) structure is designed and fabricated in accordance with the physical specifications of its electrical and mechanical container and the requirements for the application. The fabricated quad-MIMO antennas covering the frequency range of 3.27 to 3.83 GHz achieve 10 dBi gains. As a result of quad-MIMO antennas' unidirectional radiation patterns, there is a greater than 10 dB contrast between the co- and cross-polarized radiation patterns in the main direction of the antenna. Furthermore, aligned and vertical antennas provide isolation of more than 16 dB. The single-element and quad-MIMO MED antennas are analyzed in Computer Simulation Technology (CST) Studio Suite, a high-frequency simulator software.
  • Realization of Programmable Chessboard Mushroom-type Metasurface for Beamforming Applications
    A. Abraray, R. A. M. Pereira, K. Kaboutari, S. Maslovski
    2023 Photonics and Electromagnetics Research Symposium Piers 2023 Proceedings, 2023
    A reconfigurable microwave reflectarray metasurface (MS) is investigated for beamforming applications. The reflected beam direction is changed by applying external dc voltages, which create a reflection phase gradient on the structure. The studied MS comprises a chessboard-like array of metallic patches placed over a grounded dielectric slab with metallic vias connecting the patches to the controlling lines. Tunability is achieved with nonlinear capacitive loads (varactors) inserted between the corners of the metallic patches. The MS is studied analytically, numerically and experimentally, from which reshaping of the radiation pattern is observed according to the applied control voltages on the MS elements. The beamforming efficiency depends on the size of the MS and the beam width of the source antenna. It is shown that the proposed MS-based reflectarray with just 3-by-10 elements is already sufficient to redirect the beam in different directions.
  • Analytical Models and Equivalent Networks of MED Antennas
    K. Kaboutari, S. Maslovski, M. Shokri, Zh. Amiri, Ch. Ghobadi, et al.
    2023 Photonics and Electromagnetics Research Symposium Piers 2023 Proceedings, 2023
  • A Compact Four Elements Self-Isolated MIMO Antenna for C-Band Applications
    Majid Shokri, Changiz Ghobadi, Javad Nourinia, Pedro Pinho, Zhale Amiri, et al.
    Spi 2023 27th IEEE Workshop on Signal and Power Integrity Proceedings, 2023
  • Dual-Band Planar Microstrip Monopole Antenna Design Using Multi-Objective Hybrid Optimization Algorithm
    V. Hosseini, F. Shapour, P. Pinho, Y. Farhang, K. Majidzadeh, et al.
    2023 Photonics and Electromagnetics Research Symposium Piers 2023 Proceedings, 2023
  • Broadband printed dipole antenna with integrated balun and tuning element for DTV application
    M.H. Teimouri, Ch. Ghobadi, J. Nourinia, K. Kaboutari, M. Shokri, et al.
    AEU International Journal of Electronics and Communications, 2022
  • A compact 4-element printed planar MIMO antenna system with isolation enhancement for ISM band operation
    K. Kaboutari, V. Hosseini
    AEU International Journal of Electronics and Communications, 2021
  • Beamforming Antenna Arrays and Metasurfaces for Medical Imaging: From Overview to Suggesting a new Imaging Modality
    K. Kaboutari, P. Pinho, S. Maslovski
    Progress in Electromagnetics Research Symposium, 2021
  • Beamforming with Intelligent Metasurfaces: Operating Principles and Possible Implementations
    Keivan Kaboutari, Abdelghafour Abraray, Stanislav Maslovski
    Proceedings of the 2021 International Conference on Electrical Engineering and Photonics Eexpolytech 2021, 2021
  • Analytical and Numerical Modeling of Reconfigurable Beamforming Metasurfaces
    S. Maslovski, A. Abraray, K. Kaboutari, D. Nunes, A. Navarro
    Progress in Electromagnetics Research Symposium, 2021
  • A Printed Dipole Antenna for WLAN Applications with Anti-interference Functionality
    M. Shokri, P. Faeghi, K. Kaboutari, Ch. Ghobadi, J. Nourinia, et al.
    Progress in Electromagnetics Research Symposium, 2021
  • Microstrip patch antenna array with cosecant-squared radiation pattern profile
    K. Kaboutari, A. Zabihi, B. Virdee, Mostafa Pilevari Salmasi
    AEU International Journal of Electronics and Communications, 2019
  • Data acquisition system for MAET with magnetic field measurements
    Keivan Kaboutari, Ahmet Önder Tetik, Elyar Ghalichi, Mehmet Soner Gözü, Reyhan Zengin, et al.
    Physics in Medicine and Biology, 2019
  • Design and assembly of a static magnetic field generator for Lorentz Field Electrical Impedance Tomography
    Ahmet Onder Tetik, Elyar Ghalichi, Keivan Kaboutari, Nevzat Guneri Gencer
    2016 20th National Biomedical Engineering Meeting Biyomut 2016, 2017

RECENT SCHOLAR PUBLICATIONS

  • M-SRR-based Microwave Sensor Design and Modeling for Evaluating Transformer Oil Quality and Lifespan Employing Relative Permittivity
    SS Kooshki, J Ghalibafan, F Dehghani, K Kaboutari
    IEEE Sensors Journal , 2026
    2026
  • Circularly Polarized Magneto-Electric Dipole Antenna with Microstrip Line Cross Aperture-Coupled Excitation
    Z Amiri, C Ghobadi, J Nourinia, K Kaboutari, M Shokri, P Pinho
    Results in Engineering, 108927 , 2025
    2025
  • Mechanically Reconfigurable GRIN Lens Concept for Focusing and Beamforming Applications
    K Kaboutari, X Liu, A Abraray, P Pinho, S Shen, S Maslovski
    2025 International Conference on Electromagnetics in Advanced Applications … , 2025
    2025
  • Wideband omnidirectional radiation linearly polarized antenna for UHF and DTV applications
    SS Kooshki, F Dehghani, K Kaboutari, J Ghalibafan
    AEU-International Journal of Electronics and Communications 194, 155749 , 2025
    2025
  • Modeling and design of improved‐gain wideband Magneto‐Electric Dipole antenna for micro‐BTS applications
    Z Amiri, K Kaboutari, C Ghobadi, J Nourinia, M Shokri, S Maslovski
    Radio Science 59 (11), e2024RS008037 , 2024
    2024
    Citations: 6
  • Impact of Phase Optimization on the Cascade Channel and System Performance of RIS-Assisted Wireless Networks
    A Abraray, SA Busari, K Kaboutari, J Rodriguez, SI Maslovski
    2024 International Microwave and Antenna Symposium (IMAS), 1-4 , 2024
    2024
  • PIN-diode controlled slot-fed MED antenna for 5G sub-6 GHz applications
    K Kaboutari, A Siahcheshm, M Shokri, Z Amiri, A Abraray, P Pinho, ...
    2024 international conference on electromagnetics in advanced applications … , 2024
    2024
    Citations: 6
  • Numerically optimized Fourier transform-based beamforming accelerated by neural networks
    K Kaboutari, A Abraray, S Maslovski
    Applied Sciences 14 (7), 2866 , 2024
    2024
    Citations: 5
  • Realization of programmable chessboard mushroom-type metasurface for beamforming applications
    A Abraray, RAM Pereira, K Kaboutari, S Maslovski
    2023 Photonics & Electromagnetics Research Symposium (PIERS), 1909-1913 , 2023
    2023
    Citations: 5
  • 5G Indoor Micro-BTS Antenna Design Using Quad-MIMO MED Antennas
    K Kaboutari, P Pinho, ASR Oliveira
    2023 photonics & electromagnetics research symposium (piers), 814-822 , 2023
    2023
    Citations: 7
  • Analytical models and equivalent networks of med antennas
    K Kaboutari, S Maslovski, M Shokri, Z Amiri, C Ghobadi, J Nourinia
    2023 photonics & electromagnetics research symposium (piers), 115-121 , 2023
    2023
    Citations: 6
  • Dual-band planar microstrip monopole antenna design using multi-objective hybrid optimization algorithm
    V Hosseini, F Shapour, P Pinho, Y Farhang, K Majidzadeh, C Ghobadi, ...
    2023 Photonics & Electromagnetics Research Symposium (PIERS), 467-475 , 2023
    2023
    Citations: 4
  • A compact four elements self-isolated MIMO antenna for C-band applications
    M Shokri, C Ghobadi, J Nourinia, P Pinho, Z Amiri, R Barzegari, ...
    2023 IEEE 27th workshop on signal and power integrity (SPI), 1-4 , 2023
    2023
    Citations: 9
  • Chessboard Mushroom-Type Metasurface for Beamforming Applications
    K Kaboutari
    arXiv (Cornell University) , 2022
    2022
  • Broadband printed dipole antenna with integrated balun and tuning element for DTV application
    MH Teimouri, C Ghobadi, J Nourinia, K Kaboutari, M Shokri, BS Virdee
    AEU-International Journal of Electronics and Communications 148, 154161 , 2022
    2022
    Citations: 23
  • Beamforming with Intelligent Metasurfaces: Operating Principles and Possible Implementations
    K Kaboutari, A Abraray, S Maslovski
    2021 International Conference on Electrical Engineering and Photonics … , 2021
    2021
    Citations: 5
  • A compact 4-element printed planar MIMO antenna system with isolation enhancement for ISM band operation
    K Kaboutari, V Hosseini
    AEU-International Journal of Electronics and Communications 134, 153687 , 2021
    2021
    Citations: 39
  • A Printed Dipole Antenna for WLAN Applications with Anti-interference Functionality
    M Shokri, P Faeghi, K Kaboutari, C Ghobadi, J Nourinia, Z Amiri, ...
    The 43rd Photonics and Electromagnetics Research Symposium, PIERS, Hangzhou … , 2021
    2021
    Citations: 19
  • Analytical and numerical modeling of reconfigurable beamforming metasurfaces
    M Maslovski, A Abraray, K Kaboutari, D Nunes, A Navarro
    The 43rd Photonics and Electromagnetics Research Symposium, PIERS, Hangzhou … , 2021
    2021
    Citations: 6
  • Beamforming Antenna Arrays and Metasurfaces for Medical Imaging: From Overview to Suggesting a new Imaging Modality
    K Kaboutari, P Pinho, S Maslovski
    The 43rd Photonics and Electromagnetics Research Symposium, PIERS, Hangzhou … , 2021
    2021
    Citations: 6

MOST CITED SCHOLAR PUBLICATIONS

  • A compact 4-element printed planar MIMO antenna system with isolation enhancement for ISM band operation
    K Kaboutari, V Hosseini
    AEU-International Journal of Electronics and Communications 134, 153687 , 2021
    2021
    Citations: 39
  • Microstrip Patch Antenna Array with Cosecant-Squared Radiation Pattern Profile
    K Kaboutari, A Zabihi, B Virdee, MP Salmasi
    AEU - International Journal of Electronics and Communications , 2019
    2019
    Citations: 30
  • Broadband printed dipole antenna with integrated balun and tuning element for DTV application
    MH Teimouri, C Ghobadi, J Nourinia, K Kaboutari, M Shokri, BS Virdee
    AEU-International Journal of Electronics and Communications 148, 154161 , 2022
    2022
    Citations: 23
  • Data acquisition system for MAET with magnetic field measurements
    K Kaboutari, A Önder Tetik, E Ghalichi, M Soner Gözü, R Zengin, ...
    Physics in Medicine & Biology 64 (11), 115016 , 2019
    2019
    Citations: 23
  • A Printed Dipole Antenna for WLAN Applications with Anti-interference Functionality
    M Shokri, P Faeghi, K Kaboutari, C Ghobadi, J Nourinia, Z Amiri, ...
    The 43rd Photonics and Electromagnetics Research Symposium, PIERS, Hangzhou … , 2021
    2021
    Citations: 19
  • A compact four elements self-isolated MIMO antenna for C-band applications
    M Shokri, C Ghobadi, J Nourinia, P Pinho, Z Amiri, R Barzegari, ...
    2023 IEEE 27th workshop on signal and power integrity (SPI), 1-4 , 2023
    2023
    Citations: 9
  • 5G Indoor Micro-BTS Antenna Design Using Quad-MIMO MED Antennas
    K Kaboutari, P Pinho, ASR Oliveira
    2023 photonics & electromagnetics research symposium (piers), 814-822 , 2023
    2023
    Citations: 7
  • Modeling and design of improved‐gain wideband Magneto‐Electric Dipole antenna for micro‐BTS applications
    Z Amiri, K Kaboutari, C Ghobadi, J Nourinia, M Shokri, S Maslovski
    Radio Science 59 (11), e2024RS008037 , 2024
    2024
    Citations: 6
  • PIN-diode controlled slot-fed MED antenna for 5G sub-6 GHz applications
    K Kaboutari, A Siahcheshm, M Shokri, Z Amiri, A Abraray, P Pinho, ...
    2024 international conference on electromagnetics in advanced applications … , 2024
    2024
    Citations: 6
  • Analytical models and equivalent networks of med antennas
    K Kaboutari, S Maslovski, M Shokri, Z Amiri, C Ghobadi, J Nourinia
    2023 photonics & electromagnetics research symposium (piers), 115-121 , 2023
    2023
    Citations: 6
  • Analytical and numerical modeling of reconfigurable beamforming metasurfaces
    M Maslovski, A Abraray, K Kaboutari, D Nunes, A Navarro
    The 43rd Photonics and Electromagnetics Research Symposium, PIERS, Hangzhou … , 2021
    2021
    Citations: 6
  • Beamforming Antenna Arrays and Metasurfaces for Medical Imaging: From Overview to Suggesting a new Imaging Modality
    K Kaboutari, P Pinho, S Maslovski
    The 43rd Photonics and Electromagnetics Research Symposium, PIERS, Hangzhou … , 2021
    2021
    Citations: 6
  • Numerically optimized Fourier transform-based beamforming accelerated by neural networks
    K Kaboutari, A Abraray, S Maslovski
    Applied Sciences 14 (7), 2866 , 2024
    2024
    Citations: 5
  • Realization of programmable chessboard mushroom-type metasurface for beamforming applications
    A Abraray, RAM Pereira, K Kaboutari, S Maslovski
    2023 Photonics & Electromagnetics Research Symposium (PIERS), 1909-1913 , 2023
    2023
    Citations: 5
  • Beamforming with Intelligent Metasurfaces: Operating Principles and Possible Implementations
    K Kaboutari, A Abraray, S Maslovski
    2021 International Conference on Electrical Engineering and Photonics … , 2021
    2021
    Citations: 5
  • Data acquisition system for Lorentz force electrical impedance tomography using magnetic field measurements
    K Kaboutari
    PQDT-Global , 2017
    2017
    Citations: 5
  • Design and assembly of a static magnetic field generator for lorentz field electrical impedance tomography
    AÖ Tetik, E Ghalichi, K Kaboutari, NG Gençer
    2016 20th National Biomedical Engineering Meeting (BIYOMUT), 1-4 , 2016
    2016
    Citations: 5
  • Dual-band planar microstrip monopole antenna design using multi-objective hybrid optimization algorithm
    V Hosseini, F Shapour, P Pinho, Y Farhang, K Majidzadeh, C Ghobadi, ...
    2023 Photonics & Electromagnetics Research Symposium (PIERS), 467-475 , 2023
    2023
    Citations: 4
  • An Experimental Study for Magneto-Acousto Electrical Impedance Tomography using Magnetic Field Measurements
    K Kaboutari, AÖ Tetik, E Ghalichi, MS Gözü, R Zengin, NG Gençer
    ELECTRICAL IMPEDANCE TOMOGRAPHY!, 29 , 2017
    2017
    Citations: 1
  • M-SRR-based Microwave Sensor Design and Modeling for Evaluating Transformer Oil Quality and Lifespan Employing Relative Permittivity
    SS Kooshki, J Ghalibafan, F Dehghani, K Kaboutari
    IEEE Sensors Journal , 2026
    2026