Biography

Khaldoun Alkhalifeh was born in Aleppo, Syria. He received the Diploma in Electrical and Electronic Engineering, from Aleppo University-Faculty of Electrical and Electronic Engineering, in 2006, and the Master degree in Microwave and Telecommunication from the Université catholique de Louvain, Belgium, in 2010. From 2011-2016, he worked as a Research Assistant with the Antenna Research Group, Institute of Information and Communication Technologies, Electronics and Applied Mathematics (ICTEAM), Université catholique de Louvain. In March 2017, he obtained a PhD in Applied Electromagnetics from Université catholique de Louvain.


Research Interests

His research interests include multi-band antenna array design and analysis, Ground Penetrating Radar (GPR) applications, fast numerical methods for electromagnetic fields in finite periodic structures, and near-field imaging.


Field of Expertise

  • Experienced in CST, IE3D for antenna simulations, and ADS for RF circuit simulation.
  • Vast knowledge of antenna EM-simulations using the Method of Moments (MoM) and Array Scanning Method (ASM).
  • Vast knowledge about the effect of a lossy medium on antennas.
  • Matlab for Antenna Simulation and Post-Processing Analysis: VSWR, Gain and Directivity.
  • GMSH open source, autoCAD softwares for plotting and meshing the antenna layouts.
  • Hands-on antenna measurements in anechoic chamber: S-parameters and Radiation pattern.
  • Familiar with Vector Network Analyzer, Power Meter, Signal Generator and Power Amplifier.

Publication

Journal

  • [DOI] K. Alkhalifeh, G. Hislop, N. A. Ozdemir, and C. Craeye, “Efficient MoM Simulation of 3D Antennas in the Vicinity of the Ground,” Efficient MoM Simulation of 3D Antennas in the Vicinity of the Ground, vol. 64, iss. 12, 2016.
    [Bibtex]
    @article{boreal:179197,
     title = {Efficient MoM Simulation of 3D Antennas in the Vicinity of the Ground},
     author = {Alkhalifeh, Khaldoun and Greg Hislop and Nilufer A. Ozdemir and Craeye, Christophe},
     abstract = {A novel fast technique is presented to account for the effect of an arbitrary soil permittivity in the analysis of Ground Penetrating Radar (GPR) antennas in the presence of a flat layered ground.We named the method Fast Ground Coupling Matrix (FGCM) because it is expressed as an additional Methodof- Moment impedance matrix obtained from the radiation patterns of the basis/testing functions and the ground reflection coefficient. The advantage of this method is the independence of radiation patterns from the ground’s physical and electromagnetic parameters (layer thickness, complex permittivity, permeability, etc.). The new matrix formulation efficiently calculates the impedance matrix due to the ground’s contribution, with a loop over the ground parameters (permittivity, conductivity and/or permeability), and changing the distance between antenna and ground. The number of samples in (complex) spectral domain is dramatically reduced by explicitly compensating truncation with aliasing errors in the spectral integration. To demonstrate the accuracy and efficiency of the proposed method, numerical results for 3D metallic Vivaldi and typical dipole antennas are presented. A good agreement among the exact Method of Moments (MoM)solutions, the simulation results, and measured data is observed over an ultra-wide bandwidth.},
     Keywords = {Ground Penetration Radar (GPR) , Method of Moments , dielectric measurements , permittivity , conductivity , ultra-wide band (UWB) , contour deformation , Green’s function},
     language = {Anglais},
     journal = {Efficient MoM Simulation of 3D Antennas in the Vicinity of the Ground},
     volume = {64},
     number = {12},
     issn = {1558-2221},
     doi = {10.1109/TAP.2016.2618482},
     year = {2016},
     url = {http://hdl.handle.net/2078.1/179197}}

Conference

  • [DOI] H. A. Kayani, K. Alkhalifeh, and C. Craeye, “Open-Circuit to Embedded Pattern Approach with Harmonic Optimization in ESPAR,” in Proceedings of the International Conference NEMO 2017, 2017.
    [Bibtex]
    @inproceedings{boreal:195137,
     title = {Open-Circuit to Embedded Pattern Approach with Harmonic Optimization in ESPAR},
     author = {Kayani, Husnain Ali and Alkhalifeh, Khaldoun and Craeye, Christophe},
     abstract = {The radiation characteristics of Electronically Steerable Parasitic Array Radiators (ESPAR) can be modified by changing the loads attached to the parasitic radiators. The open-circuit pattern to embedded pattern approach is employed to compute the radiation pattern, when dynamic loads are attached to the parasitic radiators. It provides results exactly matching to those of full-wave simulations without any approximation and it is computationally highly efficient in the optimization phase. The weighted mean squared error is used as a cost function for optimization to obtain the objective radiation pattern. The optimization is carried out using a harmonic decomposition of load values versus the position index of parasitic elements and it provides results within a minute with an average error below 1dB between objective radiation pattern and obtained radiation pattern within the main lobe.},
     Keywords = {Antenna radiation patterns ,    Antenna arrays ,    Optimization ,    Load modeling ,    Loaded antennas ,    Harmonic analysis ,    Dipole antennas},
     language = {Anglais},
     booktitle = {Proceedings of the International Conference NEMO 2017},
     doi = {10.1109/NEMO.2017.7964177},
     publisher = {IEEE},
     year = {2017},
     url = {http://hdl.handle.net/2078.1/195137}}
  • K. Alkhalifeh, N. A. Ozdemir, and C. Craeye, “Efficient Simulation of Coupled Ground Antennas.” 2015.
    [Bibtex]
    @inproceedings{boreal:162291,
     title = {Efficient Simulation of Coupled Ground Antennas},
     author = {Alkhalifeh, Khaldoun and Ozdemir, Nilufer Aslihan and Craeye, Christophe},
     abstract = {A novel technique is presented for the accurate and efficient simulation of Ground Penetrating Radar (GPR) antennas coupled to an arbitrary ground. The problem of generating an impedance matrix is reformulated using expressions of the basis and testing function far-field patterns which are independent of the ground’s physical and electromagnetic parameters. This allows for efficient calculation of the antenna’s impedance matrix while looping through values for the soil parameters},
     language = {Anglais},
     year = {2015},
     url = {http://hdl.handle.net/2078.1/162291}}
  • K. Alkhalifeh, S. N. Jha, S. Karki, and C. Craeye, “On the Use of Contour-FFT for the MBF-based Analysis of Arrays of Antennas Placed Vertically Above a Multi-layered Substrate.” 2015.
    [Bibtex]
    @inproceedings{boreal:162285,
     title = {On the Use of Contour-FFT for the MBF-based Analysis of Arrays of Antennas Placed Vertically Above a Multi-layered Substrate},
     author = {Alkhalifeh, Khaldoun and Jha, Shambhu Nath and Karki, Sumit and Craeye, Christophe},
     abstract = {A method is proposed for the fast Macro Basis Functions (MBFs) characterization of arrays of antennas placed vertically above a multi-layered substrate by using the Contour-Fast Fourier Transform (Contour-FFT) method. The presented work aims at accelerating the evaluation of interactions between the MBFs defined on the elements corresponding to antennas extending vertically above the ground. We first write a complex plane extension of the interaction between antennas via reflection by the ground. The calculation is then accelerated using the Contour-FFT. We exploit the Contour-FFT available for planar arrays to efficiently obtain the solution of the currents on the vertical antennas with the consideration of reflections from the semi-infinite ground. Results are presented and future perspectives are highlighted.},
     language = {Anglais},
     year = {2015},
     url = {http://hdl.handle.net/2078.1/162285}}
  • K. Alkhalifeh, S. N. Jha, S. Karki, and C. Craeye, “On the use of Contour-FFT for the MBF-based analysis of arrays of antennas placed vertically above a multi-layered substrate,” in Proceedings of the 9th European Conference on Antennas and Propagation – EUCAP 2015, 2015.
    [Bibtex]
    @inproceedings{boreal:162816,
     title = {On the use of Contour-FFT for the MBF-based analysis of arrays of antennas placed vertically above a multi-layered substrate},
     author = {Alkhalifeh, Khaldoun and Jha, Shambhu Nath and Karki, Sumit and Craeye, Christophe},
     Keywords = {ICTEAM/ELEN , Antennas},
     language = {Anglais},
     booktitle = {Proceedings of the 9th European Conference on Antennas and Propagation - EUCAP 2015},
     publisher = {IEEE},
     year = {2015},
     url = {http://hdl.handle.net/2078.1/162816}}
  • [DOI] K. Alkhalifeh, C. Craeye, and S. Lambot, “Design of a 3D UWB linear array of Vivaldi antennas devoted to water leaks detection,” in Proceedings of the 15th International Conference on Ground Penetrating Radar, USA, 2014.
    [Bibtex]
    @inproceedings{boreal:154104,
     title = {Design of a 3D UWB linear array of Vivaldi antennas devoted to water leaks detection},
     author = {Alkhalifeh, Khaldoun and Craeye, Christophe and Lambot, Sébastien},
     abstract = {The design of a linear Vivaldi antenna array for water leaks detection is presented. We show the 3D antenna design with the bandwidth of interest between 250-2000 MHz, which is necessary for sufficient depth penetration and high resolution imaging and characterization. New modifications on features with respect to the traditional Vivaldi antenna design are discussed. The radiation patterns show that the directivity increases with frequency. Near-fields in E and H planes in the front of the antenna are depicted and display smooth spreading over a sufficiently narrow area of radiation exposure. The impact of the ground on the antenna is analyzed. The complete design of a linear array of 4 elements is presented, and the mutual coupling between elements is illustrated.},
     Keywords = {ELEN , Vivaldi antenna , radar , ultra-wideband , UWB , 2470},
     language = {Anglais},
     booktitle = {Proceedings of the 15th International Conference on Ground Penetrating Radar},
     editor = {Sébastien Lambot, Antonis Giannopoulos, Lara Pajewski, Frédéric André, Evert Slob and Christophe Craeye},
     doi = {10.1109/ICGPR.2014.6970532},
     address = {USA},
     publisher = {IEEE},
     year = {2014},
     url = {http://hdl.handle.net/2078.1/154104}}
  • [DOI] K. Alkhalifeh, A. Cosse, C. Craeye, and B. Macq, “Microwave imaging from wheel-of-time data,” in EuCAP 2014, 2014.
    [Bibtex]
    @inproceedings{boreal:182378,
     title = {Microwave imaging from wheel-of-time data},
     author = {Alkhalifeh, Khaldoun and Cosse, Augustin and Craeye, Christophe and Macq, Benoît},
     Keywords = {ICTEAM:BIOM},
     language = {Anglais},
     booktitle = {EuCAP 2014},
     editor = {IEEE},
     doi = {10.1109/EuCAP.2014.6901832},
     publisher = {IEEE},
     year = {2014},
     url = {http://hdl.handle.net/2078.1/182378}}
  • [DOI] S. Hubert, K. Alkhalifeh, N. A. Ozdemir, and C. Craeye, “Compact Mathematical Description of Sectorially Symmetrical Arrays.” 2013.
    [Bibtex]
    @inproceedings{boreal:137367,
     title = {Compact Mathematical Description of Sectorially Symmetrical Arrays},
     author = {Hubert, Simon and Alkhalifeh, Khaldoun and Ozdemir, Nilufer Aslihan and Craeye, Christophe},
     abstract = {The proposed approach is being developed in the framework of compact direction-finding systems that include polarization estimation. This work concentrates on sectorially symmetrical arrays, and combines the classical Array Scanning Method (ASM) with a Spherical Waves Decomposition (SWD) in order to directly compute the SWD coefficients based on the ASM current distributions. This approach offers the advantages of a fast computation based on the current distribution on only one antenna, as well as a reduced set of parameters needed to evaluate the embedded element patterns.},
     language = {Anglais},
     doi = {10.1109/ICEAA.2013.6632430},
     year = {2013},
     url = {http://hdl.handle.net/2078.1/137367}}
  • [DOI] K. Alkhalifeh, R. Sarkis, and C. Craeye, “Wheel-of-Time Array Devoted to Near-Field Imaging Applications,” in Proceedings of the International Cost Estimating and Analysis Association – ICEAA’13, 2013.
    [Bibtex]
    @inproceedings{boreal:139955,
     title = {Wheel-of-Time Array Devoted to Near-Field Imaging Applications},
     author = {Alkhalifeh, Khaldoun and Sarkis, R. and Craeye, Christophe},
     Keywords = {ICTEAM/ELEN},
     language = {Anglais},
     booktitle = {Proceedings of the International Cost Estimating and Analysis Association - ICEAA'13},
     doi = {10.1109/ICEAA.2013.6632427},
     year = {2013},
     url = {http://hdl.handle.net/2078.1/139955}}
  • [DOI] K. Alkhalifeh, R. Sarkis, and C. Craeye, “Design of a Novel 3D Circular Vivaldi Antennas Array for Ultra-Wideband Near-Field Radar Imaging,” in Proceedings of the 6th European Conference on Antennas and Propagation – EUCAP 2012, 2012.
    [Bibtex]
    @inproceedings{boreal:123393,
     title = {Design of a Novel 3D Circular Vivaldi Antennas Array for Ultra-Wideband Near-Field Radar Imaging},
     author = {Alkhalifeh, Khaldoun and Sarkis, Rémi and Craeye, Christophe},
     abstract = {The design of a circular Vivaldi antenna array for Ultra wideband near-field radar imaging is presented. We first show a 3D single Vivaldi antenna with a 12:1 bandwidth without the need for complex microstrip transitions. A 3D circular array of 10 electrically connected elements is simulated using the Method of Moments, with 12:1 bandwidth. The 3D circular array is simulated using the Array Scanning Method (ASM) applied to the Method of Moments, where the ASM appears as a computationally efficient approach for simulating large circular antenna arrays. Near fields in E and H planes in the area of radiation exposure are depicted and exhibit smooth spreading over the whole field of view.},
     Keywords = {ICTEAM/ELEN , WAVE},
     language = {Anglais},
     booktitle = {Proceedings of the 6th European Conference on Antennas and Propagation - EUCAP 2012},
     doi = {10.1109/EuCAP.2012.6205930},
     publisher = {IEEE},
     year = {2012},
     url = {http://hdl.handle.net/2078/123393}}

Contact

Email : khaldoun.alkhalifeh@uclouvain.be

Phone : +32 10 47 90 21

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