Computational Electromagnetics (CEM)

CEM group concentrates on theoretical research in classical electromagnetic theory. Among the currently developed topics belong radiation properties of electrically small radiators and scatterers and their optimizations. Members of the group have for many years been also involved in classical antenna theory and field propagation in artificial composite materials.

Current research activities are strongly entangled with a “source concept” paradigm, in which all involved field quantities as well as engineering metrics are described solely in terms of electromagnetic sources. The idea of the source concept is sketched in the following figure.

CEM team collaborates with other department’s teams.

Core Members of the Group:

 

Doctoral Students:

Students

Visiting Reseachers

Vit Losenicky     
Michal Masek
Martin Strambach Lamyae Akrou
 

Current Projects

Source Concept of Electrically Small Antenna Synthesis  (2015-2017, GA15-10280Y)

 

Active External Collaborations

Brno University of Technology, Czech Republic (Petr Kadlec, Vladimir Sedenka)
University of Lund, Sweden (Mats Gustafson, Doruk Tayli; Casimir Ehrenborg)
KTH Royal Institute of Technology, Sweden (Lars Johnsson)
Catholic University of Leuven, Belgium (Guy Vandenbosch)
University of North Carolina, USA (Kurt Schab)

 

Journal Papers (Last Three Years)

Current and Antenna Optimization

  • M. Capek, M. Gustafsson, and K. Schab, “"Minimization of antenna quality factor",” 2017, eprint arXiv: 1612.07676. [Online]. Available: https://arxiv.org/abs/1612.07676
 
  • L. Jelinek and M. Capek, “"Optimal currents on arbitrarily shaped surfaces,"” IEEE Trans. Antennas Propag., vol. 65, no. 1, pp. 329–341, Jan. 2017.
 
  • M. Capek and L. Jelinek, "“Optimal composition of modal currents for minimal quality factor Q",” IEEE Trans. Antennas Propag., vol. 64, no. 12, pp. 5230–5242, 2016.
 

Characteristic Modes

  • M. Capek, V. Losenicky, L. Jelinek, and M. Gustafsson, “"Validating the characteristic modes solvers,”" 2017, eprint arXiv: 1702.07037. [Online]. Available: https://arxiv.org/abs/1702.07037
 
  • M. Capek, P. Hazdra, M. Masek, and V. Losenicky, "“Analytical representation of characteristic modes decomposition,"” IEEE Trans. Antennas Propag., vol. 65, pp. 713–720, 2017.
 
  • M. Capek, J. Eichler, and P. Hazdra, “"Evaluating radiation efficiency from characteristic currents,"” IET Microw. Antenna P., vol. 9, no. 1, pp. 10–15, Jan. 2015.
 
  • J. Eichler, P. Hazdra, and M. Capek, “"Aspects of mesh generation for characteristic mode analysis,"” IEEE Antennas Propag. Mag., vol. 56, no. 6, pp. 172–183, June 2014.
 

Stored Energy and Quality Factor Q

  • K. Schab, L. Jelinek, and M. Capek, “"Recoverable energy of dissipative electromagnetic systems,”" 2017, eprint arXiv: 1701.06313. [Online]. Available: https://arxiv.org/abs/1701.06313
 
  • M. Capek and L. Jelinek, "“Comments on ‘On Stored Energies and Radiation Q’,”" IEEE Trans. Antennas Propag., vol. 64, no. 10, pp. 4575–4576, 2016.
 
  • M. Capek, L. Jelinek, and G. A. E. Vandenbosch, "“Stored electromagnetic energy and quality factor of radiating structures,"” Proc. R. Soc. A, vol. 472, pp. 1–16, 2016.
 
  • L. Jelinek, M. Capek, P. Hazdra, and J. Eichler, "“An analytical evaluation of the quality factor Qz for dominant spherical modes,”" IET Microw. Antenna P., vol. 9, no. 10, pp. 1096–1103, 2015.
 
  • M. Capek, L. Jelinek, and P. Hazdra, “"On the functional relation between quality factor and fractional bandwidth,"” IEEE Trans. Antennas Propag., vol. 63, no. 6, pp. 2787–2790, June 2015.
 
  • M. Capek and L. Jelinek, “"Various interpretations of the stored and the radiated energy density,"” 2015, eprint arXiv: 1503.06752. [Online]. Available: http://arxiv.org/abs/1503.06752
 
  • P. Hazdra, M. Capek, J. Eichler, and M. Mazanek, "“The radiation Q-factor of a horizontal lambda/2 dipole above ground plane,"” IEEE Antennas Wireless Propag. Lett., vol. 13, pp. 1073–1075, 2014.
 
  • M. Capek, L. Jelinek, P. Hazdra, and J. Eichler, “"The measurable Q factor and observable energies of radiating structures,"” IEEE Trans. Antennas Propag., vol. 62, no. 1, pp. 311–318, Jan. 2014.
 

Artificial Materials

  • L. Jelinek, O. Kratky, and M. Capek, "“An evaluation of polarizability tensors of arbitrarily shaped highly conducting bodies,"” IET Microw. Antenna P., 2017, DOI: 10.1049/iet-map.2016.0793.
 
  • I. Hrebikova, L. Jelinek, and M. G. Silveirinha, “"Embedded energy state in an open semiconductor heterostructure,"” Phys. Rev. B, vol. 92, p. 155303, 2015.
 
  • L. Jelinek, M. Lapine, and R. C. McPhedran, "“Applicability of nonresonant artificial diamagnetics,”" Phys. Rev. B, vol. 90, p. 104413, 2014.
 
  • L. Jelinek and J. Machac, “"A polarizability measurement method for electrically small particles,”" IEEE Antennas Wireless Propag. Lett., vol. 13, pp. 1051–1053, 2014.
 
  • I. Hrebikova, L. Jelinek, J. Voves, and J. D. Baena, "“A perfect lens for ballistic eectrons: An electron-light wave analogy,"” Photonics and Nanostructures - Fundamentals and Applications, vol. 12, pp. 9–15, 2014.
 

/Edited 06. 04. 2017, MC/